Quisk version 4.2.53

2026-06-30 17:06:52 -04:00
33 changed files with 1244 additions and 189 deletions
@@ -1,3 +1,12 @@
+Quisk Version 4.2.53  June 2026
+===============================
+I added TCI support for Software Defined Connectors CW skimmer. Please test.
+
+This version of Quisk now works on Python 3.14 and higher. I changed to a new build system because
+the old one has been deprecated by Python. They no longer support running setup.py.
+The Linux version has a new makefile. The Windows version is installed by pip as usual.
+Please test.
+
 Quisk Version 4.2.52  May 2026
 ==============================
 This is a fix for various TCI bugs. Please test with WSJT-X and let me know if all problems are solved.
@@ -1,2 +1,2 @@
-#Quisk version 4.2.52
+#Quisk version 4.2.53
 from .quisk import main
@@ -9,6 +9,7 @@
 #include <Python.h>
 #include <complex.h>
 #include <math.h>
+#include <string.h>
 #include <sys/time.h>
 #include <time.h>
 #include <errno.h>
@@ -3,6 +3,7 @@
 #ifdef MS_WINDOWS
 #include <Winsock2.h>
 #include <windows.h>
+#include <string.h>
 #else
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -105,7 +106,7 @@ static PyObject * open_rx_udp(const char * ip, int port)
 	wVersionRequested = MAKEWORD(2, 2);
 	if (WSAStartup(wVersionRequested, &wsaData) != 0) {
 		sprintf(buf, "Failed to initialize Winsock (WSAStartup)");
-		return PyString_FromString(buf);
+		return PyUnicode_FromString(buf);
 	}
 #endif
 //	quisk_using_udp = 1;
@@ -145,7 +146,7 @@ static PyObject * open_rx_udp(const char * ip, int port)
 	else {
 		sprintf(buf, "Failed to open socket");
 	}
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }

 static PyObject * close_rx_udp(PyObject * self, PyObject * args)
@@ -343,7 +344,7 @@ static PyObject * open_samples(PyObject * self, PyObject * args)
 	quisk_sample_source(NULL, NULL, &afedri_read_rx_udp);
 //////////////
 	return open_rx_udp(ip, port);		// AFEDRI specific
-//	return PyString_FromString(buf);		// return a string message
+//	return PyUnicode_FromString(buf);		// return a string message
 }

 // Miscellaneous functions needed by the SDR-IQ; called from the GUI thread as
@@ -1,7 +1,24 @@
+MODULE_NAME := afedrinet_io
+OBJDIR := ../build/local

-afedrinet2:
-	python2 setup.py build_ext --force --inplace
+CFLAGS			:= $(shell python3 ../makefil.py --cflags)
+LDFLAGS			:= $(shell python3 ../makefil.py --ldflags)
+EXTENSION_SUFFIX	:= $(shell python3 ../makefil.py --suffix)
+TARGET := $(MODULE_NAME)$(EXTENSION_SUFFIX)

-afedrinet3:
+# Default target: Link the shared library object
+$(TARGET): afedrinet_io.o $(OBJDIR)/import_quisk_api.o $(OBJDIR)/is_key_down.o
+	$(CC) -o $@ afedrinet_io.o $(LDFLAGS) $(OBJDIR)/import_quisk_api.o $(OBJDIR)/is_key_down.o
+
+# Compile the C source files into object files
+afedrinet_io.o: afedrinet_io.c ../quisk.h
+	$(CC) -o $@ -c $< $(CFLAGS) -I..
+
+.PHONY: clean
+clean:
+	-rm -f  *.o 
+	-rm -f  $(MODULE_NAME)*.so
+
+.PHONY: afedrinet-old
+afedrinet-old:
 	python3 setup.py build_ext --force --inplace
-
@@ -84,7 +84,7 @@ h3     {font-size:1.6rem;}
 <div class="contents">
 <h1>
 <a id="Welcome"></a>
-Welcome to QUISK (September 2025)
+Welcome to QUISK (June 2026)
 </h1>

 <p>
@@ -197,7 +197,7 @@ Quisk is free open source software written in Python and C. It is hosted on the
 <br>
 <p>
 If you have Python 3 installed on your computer, just continue to use that version.
-<b>On Windows Quisk requires Python 3.8, 3.9, 3.10, 3.11, 3.12 or 3.13.</b>
+On Windows Quisk requires Python 3.8 or higher.
 If you want to install a more recent version of Python, uninstall the old version first.
 Running multiple versions of Python is possible but can be confusing and is not necessary.
 <b>A Quisk installation is needed for each version of Python you have. If you upgrade to a newer Python
@@ -208,8 +208,7 @@ you must re-install Quisk. But your Quisk settings will be preserved.</b>
 <p>
 Windows does not include Python, so you must first install a recent version of 64-bit Python 3.
 If you already have 64-bit Python 3 installed, just keep using it.
-<b>On Windows Quisk requires Python 3.8, 3.9, 3.10, 3.11, 3.12 or 3.13.</b>
-There may be newer versions of Python, but until support is added, use the versions listed above.
+On Windows Quisk requires Python 3.8 or higher.
 Python is available from <a href="http://www.python.org/">http://www.python.org</a>.
 There is an option to <b>Add Python to PATH</b>. You MUST select
 this option so that you can start python by just typing "python" instead of the whole path
@@ -383,6 +382,7 @@ You only clone github for the initial installation. To update Quisk, use pull fo
 <pre>
 cd ~/quisk
 git pull
+make clean
 make
 </pre>
 <br>
@@ -1,5 +1,6 @@
 #include <Python.h>
 #include <stdlib.h>
+#include <string.h>
 #include <math.h>
 #include <complex.h>
 #include "quisk.h"
@@ -1,6 +1,7 @@
 #include <Python.h>
 #include <stdlib.h>
 #include <math.h>
+#include <string.h>
 #include <complex.h>	// Use native C99 complex type for fftw3
 #include "quisk.h"
 #include "filter.h"
@@ -32,6 +32,8 @@ with this:
 */

 #include <Python.h>
+#include <string.h>
+#include <stdio.h>

 void ** Quisk_API;		// array of pointers to functions and variables from module _quisk
 struct sound_conf * pt_quisk_sound_state;		// pointer to quisk_sound_state
@@ -1,5 +1,6 @@
 #include <Python.h>	// used by quisk.h
 #include <complex.h>	// Used by quisk.h
+#include <string.h>
 #include "quisk.h"

 // This module provides methods to access the state of the key.
@@ -0,0 +1,70 @@
+# This provides helper functions for our makefile.
+
+# Changes for MacOS support thanks to Mario, DL3LSM.
+# Changes for building from macports provided by Eric, KM4DSJ
+# Updated code for a Mac build contributed by Christoph, DL1YCF, December 2020.
+# Converted from setup.py to makefile by Jim Ahlstrom, June 2026
+
+import sys, os, subprocess, sysconfig
+
+if len(sys.argv) < 2:
+  sys.exit(2)
+
+job = sys.argv[1]
+
+def flags ():
+  # Fetch compiler flags and link flags from Python
+  result = subprocess.run(["python3-config", "--cflags"], capture_output=True, text=True, check=True)
+  cflags = result.stdout.strip()
+  cflags += " -fPIC"
+  result = subprocess.run(["python3-config", "--ldflags"], capture_output=True, text=True, check=True)
+  ldflags = result.stdout.strip()
+  ldflags += " -shared -lm -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fwrapv -O2 -lfftw3"
+  if sys.platform == "darwin":	# Build for Macintosh
+    cflags += " -DQUISK_HAVE_PORTAUDIO "
+    ldflags += " -lportaudio "
+    if os.path.isdir('/opt/local/include'):	# MacPorts
+      base_dir = '/opt/local'
+    elif os.path.isdir('/usr/local/include'):	# HomeBrew on macOS Intel 
+      base_dir = '/usr/local'
+    elif os.path.isdir('/opt/homebrew/include'): # HomeBrew on Apple Silicon
+      base_dir = '/opt/homebrew'
+    else:						# Regular build?
+      base_dir = '/usr'
+    if os.path.isfile(base_dir + "/include/pulse/pulseaudio.h"):
+      cflags += " -DQUISK_HAVE_PULSEAUDIO "
+      ldflags += " -lpulse "
+    cflags += " -I. -I%s/include " % base_dir
+    ldflags += " -L. -L%s/lib " % base_dir
+  elif "freebsd" in sys.platform:	#Build for FreeBSD
+    cflags += " -DQUISK_HAVE_PULSEAUDIO -I. -I/usr/local/include"
+    ldflags += " -lpulse -L. -L/usr/local/lib"
+  else:		# Linux
+    cflags += " -DQUISK_HAVE_ALSA -DQUISK_HAVE_PULSEAUDIO"
+    ldflags += " -lasound -lpulse"
+    if os.path.isfile("/usr/include/portaudio.h"):
+      cflags += " -DQUISK_HAVE_PORTAUDIO"
+      ldflags += " -lportaudio"
+  return cflags, ldflags
+
+if job == "--soapy":
+  # See if soapy is available
+  if os.path.isdir("/usr/include/SoapySDR") or os.path.isdir("/usr/local/include/SoapySDR"):
+    print('1')
+  else:
+    print('0')
+
+elif job == "--suffix":
+  # Determine the platform-specific extension suffix (e.g., .cpython-311-x86_64-linux-gnu.so)
+  print(sysconfig.get_config_var('EXT_SUFFIX'))
+
+elif job == "--cflags":
+  cc, ld = flags()
+  print(cc)
+
+elif job == "--ldflags":
+  cc, ld = flags()
+  print(ld)
+
+else:
+  sys.exit(1)
@@ -1,18 +1,93 @@
-.PHONY: quisk
+# This makefile replaces the old Python "setup.py build_ext" which has been deprecated.
+# See "quisk-old" below to make Quisk using the old setup.py.

-quisk:
+MODULE_NAME := _quisk
+OBJDIR := build/local
+SUBDIRS := afedrinet
+
+ifeq ($(shell python3 makefil.py --soapy), 1)
+SUBDIRS := $(SUBDIRS) soapypkg
+endif
+
+SRCS := \
+base64.c \
+extdemod.c \
+filter.c \
+freedv.c \
+handshake.c \
+is_key_down.c \
+microphone.c \
+quisk.c \
+quisk_wdsp.c \
+sha1.c \
+sound.c\
+sound_alsa.c \
+sound_directx.c \
+sound_portaudio.c \
+sound_pulseaudio.c \
+sound_wasapi.c \
+tci.c \
+utf8.c \
+utility.c \
+ws.c
+
+CFLAGS			:= $(shell python3 makefil.py --cflags)
+LDFLAGS			:= $(shell python3 makefil.py --ldflags)
+EXTENSION_SUFFIX	:= $(shell python3 makefil.py --suffix)
+TARGET := $(MODULE_NAME)$(EXTENSION_SUFFIX)
+
+#$(info Info CFLAGS $(CFLAGS))
+#$(info Info LDFLAGS $(LDFLAGS))
+#$(info Info TARGET $(TARGET))
+#$(info Info SUBDIRS $(SUBDIRS))
+
+OBJS := $(patsubst %.c, $(OBJDIR)/%.o, $(SRCS))
+
+.PHONY: all clean test
+.PHONY: $(SUBDIRS)
+
+# Default target
+all: $(OBJDIR) $(OBJDIR)/import_quisk_api.o ac2yd/remote.o $(TARGET) $(SUBDIRS)
+
+$(SUBDIRS):
+	$(MAKE) -C $@
+
+$(OBJDIR):
+	@mkdir -p $(OBJDIR)
+
+# Link the shared library object
+$(TARGET): $(OBJS)
+	$(CC) -o $@ $(OBJS) ac2yd/remote.o $(LDFLAGS)
+
+# Define the location for dependency files
+DEPS = $(patsubst %.o,$(OBJDIR)/%.d,$(notdir $(OBJS)))
+DEPFLAGS = -MMD -MP -MF $(OBJDIR)/$(notdir $*).d
+-include $(DEPS)
+
+# Compile the C source files into object files
+ac2yd/remote.o:	ac2yd/remote.c quisk.h filter.h
+	$(CC) -o $@ -c $< $(CFLAGS) $(DEPFLAGS)
+
+$(OBJDIR)/import_quisk_api.o: import_quisk_api.c
+	$(CC) -o $@ -c $< $(CFLAGS) $(DEPFLAGS)
+
+$(OBJDIR)/%.o: %.c | $(OBJDIR)
+	$(CC) -o $@ -c $< $(CFLAGS) $(DEPFLAGS)
+
+clean:
+	-rm -f  $(OBJDIR)/*.o $(OBJDIR)/*.d
+	-rm -f	ac2yd/*.o
+	-rm -f	$(MODULE_NAME)*.so
+	for dir in $(SUBDIRS); do \
+		$(MAKE) -C $$dir clean; \
+	done
+
+# Run a test script to verify that the module can be imported
+test: $(TARGET)
+	@python3 -c "import $(MODULE_NAME); print('Successfully imported:', $(MODULE_NAME).__file__)"
+
+
+
+.PHONY: quisk-old
+quisk-old:
 	python3 setup.py build_ext --force --inplace
-	@echo
-
-quisk3:
-	python3 setup.py build_ext --force --inplace
-	@echo
-
-soapy3:
-	(cd soapypkg; make soapy3)
-
-afedrinet3:
-	(cd afedrinet; make afedrinet3)
-
-perseus3:
-	(cd perseuspkg; make perseus3)
@@ -3,6 +3,7 @@
 #include <math.h>
 #include <sys/time.h>
 #include <complex.h>
+#include <string.h>
 #include <fftw3.h>
 #include "quisk.h"
 #include <sys/types.h>
@@ -1,7 +1,25 @@
+MODULE_NAME := perseus
+OBJDIR := ../build/local

-perseus2:
-	python2 setup.py build_ext --force --inplace
+CFLAGS			:= $(shell python3 ../makefil.py --cflags)
+LDFLAGS			:= $(shell python3 ../makefil.py --ldflags)
+EXTENSION_SUFFIX	:= $(shell python3 ../makefil.py --suffix)
+TARGET := $(MODULE_NAME)$(EXTENSION_SUFFIX)

-perseus3:
+# Default target: Link the shared library object
+$(TARGET): perseus.o $(OBJDIR)/import_quisk_api.o
+	$(CC) -o $@ perseus.o $(LDFLAGS) $(OBJDIR)/import_quisk_api.o
+
+# Compile the C source files into object files
+perseus.o: perseus.c ../quisk.h ../filter.h
+	$(CC) -o $@ -c $< $(CFLAGS) -I..
+
+.PHONY: clean
+clean:
+	-rm -f  *.o 
+	-rm -f  $(TARGET)
+
+.PHONY: perseus-old
+perseus-old:
 	python3 setup.py build_ext --force --inplace

@@ -297,11 +297,11 @@ static PyObject * open_device(PyObject * self, PyObject * args)


 	main_cleanup:
-	return PyString_FromString("ERROR");
+	return PyUnicode_FromString("ERROR");

 	exit_success:
 	
-	return PyString_FromString(buf128);
+	return PyUnicode_FromString(buf128);
 	
 	
 }
@@ -0,0 +1,41 @@
+[build-system]
+requires = ["setuptools>=61.0.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "quisk"
+version = "4.2.53"
+requires-python = ">=3.13"
+description = 'QUISK is a Software Defined Radio (SDR) transceiver that can control various radio hardware.'
+license = "GPL-2.0-or-later"
+license-files = ["license.txt"]
+authors = [
+  {name = "James C. Ahlstrom", email="jahlstr@gmail.com"}
+]
+keywords = ['quisk', 'sdr', 'software defined radio']
+classifiers = [
+	'Development Status :: 6 - Mature',
+	'Environment :: X11 Applications',
+	'Environment :: Win32 (MS Windows)',
+	'Intended Audience :: End Users/Desktop',
+	'Natural Language :: English',
+	'Operating System :: POSIX :: Linux',
+	'Operating System :: Microsoft :: Windows',
+	'Programming Language :: Python :: 3',
+	'Programming Language :: C',
+	'Topic :: Communications :: Ham Radio',
+]
+
+[project.gui-scripts]
+quisk = "quisk.quisk:main"
+
+[project.urls]
+Homepage = "https://james.ahlstrom.name/quisk/index.html"
+Documentation = "https://james.ahlstrom.name/quisk/docs.html"
+Repository = "https://github.com/jimahlstrom/quisk"
+Changelog = "https://james.ahlstrom.name/quisk/CHANGELOG.txt"
+
+[tool.setuptools.packages.find]
+where = ["."]
+
+
@@ -3,6 +3,7 @@
 #include <stdlib.h>
 #include <math.h>
 #include <complex.h>	// Use native C99 complex type for fftw3
+#include <string.h>
 #include <fftw3.h>
 #include <sys/types.h>
 #include <stdbool.h>
@@ -4027,7 +4028,7 @@ static PyObject * open_rx_udp(PyObject * self, PyObject * args)
 	wVersionRequested = MAKEWORD(2, 2);
 	if (WSAStartup(wVersionRequested, &wsaData) != 0) {
 		sprintf(buf, "Failed to initialize Winsock (WSAStartup)");
-		return PyString_FromString(buf);
+		return PyUnicode_FromString(buf);
 	}
 	else {
 		cleanupWSA = 1;
@@ -4076,7 +4077,7 @@ static PyObject * open_rx_udp(PyObject * self, PyObject * args)
 	else {
 		sprintf(buf, "Failed to open socket");
 	}
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }

 static PyObject * open_sound(PyObject * self, PyObject * args)
@@ -4290,7 +4291,7 @@ static PyObject * mixer_set(PyObject * self, PyObject * args)
 		return NULL;

 	quisk_alsa_mixer_set(card_name, numid, value, err_msg, QUISK_SC_SIZE);
-	return PyString_FromString(err_msg);
+	return PyUnicode_FromString(err_msg);
 }

 static PyObject * pc_to_hermes(PyObject * self, PyObject * args)
@@ -4493,12 +4494,12 @@ static PyObject * ip_interfaces(PyObject * self, PyObject * args)
 				baddr |= ~netmask;
 			tup = PyTuple_New(4);
 			if (name == NULL)
-				PyTuple_SetItem(tup, 0, PyString_FromString("unnamed"));
+				PyTuple_SetItem(tup, 0, PyUnicode_FromString("unnamed"));
 			else
-				PyTuple_SetItem(tup, 0, PyString_FromString(name));
-			PyTuple_SetItem(tup, 1, PyString_FromString(Win_NtoA(ipAddr)));
-			PyTuple_SetItem(tup, 2, PyString_FromString(Win_NtoA(netmask)));
-			PyTuple_SetItem(tup, 3, PyString_FromString(Win_NtoA(baddr)));
+				PyTuple_SetItem(tup, 0, PyUnicode_FromString(name));
+			PyTuple_SetItem(tup, 1, PyUnicode_FromString(Win_NtoA(ipAddr)));
+			PyTuple_SetItem(tup, 2, PyUnicode_FromString(Win_NtoA(netmask)));
+			PyTuple_SetItem(tup, 3, PyUnicode_FromString(Win_NtoA(baddr)));
 			PyList_Append(pylist, tup);
 			Py_DECREF(tup);
 		}
@@ -4517,10 +4518,10 @@ static PyObject * ip_interfaces(PyObject * self, PyObject * args)
 		while(p) {
 			if ((p->ifa_addr) && p->ifa_addr->sa_family == AF_INET) {
 				tup = PyTuple_New(4);
-				PyTuple_SetItem(tup, 0, PyString_FromString(p->ifa_name));
-				PyTuple_SetItem(tup, 1, PyString_FromString(Lin_NtoA(p->ifa_addr)));
-				PyTuple_SetItem(tup, 2, PyString_FromString(Lin_NtoA(p->ifa_netmask)));
-				PyTuple_SetItem(tup, 3, PyString_FromString(Lin_NtoA(p->ifa_broadaddr)));
+				PyTuple_SetItem(tup, 0, PyUnicode_FromString(p->ifa_name));
+				PyTuple_SetItem(tup, 1, PyUnicode_FromString(Lin_NtoA(p->ifa_addr)));
+				PyTuple_SetItem(tup, 2, PyUnicode_FromString(Lin_NtoA(p->ifa_netmask)));
+				PyTuple_SetItem(tup, 3, PyUnicode_FromString(Lin_NtoA(p->ifa_broadaddr)));
 				PyList_Append(pylist, tup);
 				Py_DECREF(tup);
 			}
@@ -5660,7 +5661,7 @@ static PyObject * Xdft(PyObject * pyseq, int inverse, int window)
 	static fftw_complex * samples;		// complex data for fft
 	static fftw_plan planF, planB;		// fft plan for fftW
 	static double * fft_window;			// window function
-	Py_complex pycx;					// Python C complex value
+	complex double pycx;

 	if (PySequence_Check(pyseq) != 1) {
 		PyErr_SetString (QuiskError, "DFT input data is not a sequence");
@@ -5695,22 +5696,20 @@ static PyObject * Xdft(PyObject * pyseq, int inverse, int window)
 	for (i = 0; i < size; i++) {
 		obj = PySequence_GetItem(pyseq, j);
 		if (PyComplex_Check(obj)) {
-			pycx = PyComplex_AsCComplex(obj);
+			pycx = PyComplex_RealAsDouble(obj) + I * PyComplex_ImagAsDouble(obj);
 		}
 		else if (PyFloat_Check(obj)) {
-			pycx.real = PyFloat_AsDouble(obj);
-			pycx.imag = 0;
+			pycx = PyFloat_AsDouble(obj);
 		}
 		else if (PyInt_Check(obj)) {
-			pycx.real = PyInt_AsLong(obj);
-			pycx.imag = 0;
+			pycx = PyInt_AsLong(obj);
 		}
 		else {
 			Py_XDECREF(obj);
 			PyErr_SetString (QuiskError, "DFT input data is not a complex/float/int number");
 			return NULL;
 		}
-		samples[i] = pycx.real + I * pycx.imag;
+		samples[i] = pycx;
 		if (++j >= size)
 			j = 0;
 		Py_XDECREF(obj);
@@ -5736,9 +5735,7 @@ static PyObject * Xdft(PyObject * pyseq, int inverse, int window)
 	pyseq = PyList_New(fft_size);
 	j = (size - 1) / 2;		// zero frequency in input
 	for (i = 0; i < fft_size; i++) {
-		pycx.real = creal(samples[i]);
-		pycx.imag = cimag(samples[i]);
-		PyList_SetItem(pyseq, j, PyComplex_FromCComplex(pycx));
+		PyList_SetItem(pyseq, j, PyComplex_FromDoubles(creal(samples[i]), cimag(samples[i])));
 		if (++j >= size)
 			j = 0;
 	}
@@ -29,6 +29,8 @@

 #define QUISK_CWKEY_DOWN	(quisk_hardware_cwkey || quisk_serial_key_down || quisk_midi_cwkey || quisk_remote_cwkey)

+#include <stdio.h>
+#include <stdlib.h>
 #ifdef MS_WINDOWS
 #define QUISK_SHUT_RD	SD_RECEIVE
 #define QUISK_SHUT_BOTH	SD_BOTH
@@ -264,6 +266,7 @@ extern void send_graph_data(double * fft_avg, int fft_size, double zoom, double
 PyObject * quisk_tci_set_params(PyObject * self, PyObject * args, PyObject * keywds);
 PyObject * quisk_tci_get_params(PyObject * self, PyObject * args);
 void tci_send_audio(complex double * cSamples, int nSamples);
+void tci_send_iq(complex double * cSamples, int nSamples);
 int tci_get_mic(complex double * cSamples, int mic_count);
 extern uint64_t tci_tx_audio_client;	// This is ws_cli_conn_t defined in ws.h.

@@ -4030,7 +4030,9 @@ class App(wx.App):
    self.file_name_play_cq = ''
    self.midiControls = {}		# Control object and associated function for Midi control name
    self.tci_vfo = 0
-    self.tci_started = False
+    self.tci_dds = 0
+    self.tci_modulation = ''
+    self.tci_split_enable = 0
    # get the screen size - thanks to Lucian Langa
    x, y, self.screen_width, self.screen_height = wx.Display().GetGeometry()	# Using display index 0
    self.Bind(wx.EVT_IDLE, self.OnIdle)
@@ -4361,12 +4363,12 @@ class App(wx.App):
      value = getattr(conf, "pulse_audio_verbose_output")
      QS.tci_set_params(verbose=value)
      QS.tci_set_params(start=1);
-      self.tci_started = True
-      QS.tci_set_params(tci_dds=self.VFO)
-      QS.tci_set_params(tci_if=self.txFreq)
-      self.tci_vfo = self.txFreq + self.VFO
+      self.tci_dds = self.VFO
+      QS.tci_set_params(tci_dds=self.tci_dds)
+      self.tci_vfo = self.rxFreq + self.VFO
      QS.tci_set_params(tci_vfo=self.tci_vfo)
-      QS.tci_set_params(tci_modulation=self.mode)
+      self.tci_modulation = self.mode
+      QS.tci_set_params(tci_modulation=self.tci_modulation)
      QS.tci_set_params(tci_trx=0)
      QS.tci_set_params(tci_split_enable=0)
    return True
@@ -4693,6 +4695,8 @@ class App(wx.App):
    if msg:
      print(msg, end='')
    QS.close_key()
+    if QS.tci_get_params("tci_clients_count") > 0:
+      QS.tci_set_params(close=1)
    QS.set_file_name(record_button=0)	# Turn off file recording
    time.sleep(0.1)
    if self.sound_thread:
@@ -5782,7 +5786,6 @@ class App(wx.App):
      QS.set_sidetone(self.sidetone_volume, self.sidetone_0to1, self.ritFreq, conf.keyupDelay)
  def OnBtnSplit(self, event):	# Called when the Split check button is pressed
    self.split_rxtx = self.splitButton.GetValue()
-    QS.tci_set_params(tci_split_enable=self.split_rxtx)
    if self.split_rxtx:
      if self.split_offset == 0:
        if self.mode in ("CWL", "CWU"):
@@ -5796,7 +5799,7 @@ class App(wx.App):
      QS.set_split_rxtx(0)
      self.split_offset = self.txFreq - self.rxFreq
      self.txFreq = self.rxFreq
-      self.ChangeHwFrequency(self.txFreq, self.VFO, 'OnSplit', event=event)
+      self.ChangeHwFrequency(self.txFreq, self.VFO, 'OnSplit', event=event, rx_freq=self.rxFreq)
    self.screen.SetTxFreq(self.txFreq, self.rxFreq)
  def OnMenuSplitPlay1(self, event):
    self.split_rxtx_play = 1
@@ -6168,7 +6171,6 @@ class App(wx.App):
      self.ChangeRxTxFrequency(self.rxFreq + delta + self.VFO, self.txFreq + delta + self.VFO)
    Hardware.ChangeMode(mode)
    self.mode = mode
-    QS.tci_set_params(tci_modulation=mode)
    self.MakeFilterButtons(self.Mode2Filters(mode))
    QS.set_rx_mode(Mode2Index.get(mode, 3))
    if mode == 'CWL':
@@ -6829,22 +6831,56 @@ class App(wx.App):
      if self.timer - self.clip_time0 > 1.0:
        self.clip_time0 = 0
        self.freqDisplay.Clip(0)
+    if QS.tci_get_params("tci_clients_count") > 0:
+      # These are change requests from TCI clients. All must be echoed with the new value from Quisk.
+      # modulation
+      mode = QS.tci_get_params("tci_modulation")
+      if mode is not None:	# TCI set new modulation
+        self.modeButns.SetLabel(mode, True)
+        self.tci_modulation = self.mode
+        QS.tci_set_params(tci_modulation=self.tci_modulation)
+      # split
+      split = QS.tci_get_params("tci_split_enable")
+      if split is not None:	# TCI set split_enable
+        self.splitButton.SetValue(split, True)
+        self.tci_split_enable = self.split_rxtx
+        QS.tci_set_params(tci_split_enable=self.tci_split_enable)
+      # tci dds == self.VFO
+      tci_dds = QS.tci_get_params("tci_dds")
+      if tci_dds is not None:
+        self.ChangeHwFrequency(0, tci_dds, 'TCIrequest')
+        self.tci_dds = self.VFO
+        QS.tci_set_params(tci_dds=self.tci_dds)
+      # tci_vfo == self.VFO + self.rxFreq
+      tci_vfo = QS.tci_get_params("tci_vfo")
+      if tci_vfo is not None:
+        self.ChangeRxTxFrequency(tci_vfo, None)
+        self.tci_vfo = self.VFO + self.rxFreq
+        QS.tci_set_params(tci_vfo=self.tci_vfo)
+      # tci_trx handled elsewhere
    if self.timer - self.heart_time0 > 0.10:	# call hardware to perform background tasks:
      self.heart_time0 = self.timer
      Hardware.HeartBeat()
-      if self.tci_started:
-        if self.tci_vfo != self.txFreq + self.VFO:	# limit the speed of frequency updates
-          self.tci_vfo = self.txFreq + self.VFO
+      if QS.tci_get_params("tci_clients_count") > 0:	# limit the speed of frequency updates
+        # these are changes made in Quisk that must be broadcast to all clients.
+        # modulation
+        if self.tci_modulation != self.mode:
+          self.tci_modulation = self.mode
+          QS.tci_set_params(tci_modulation=self.tci_modulation)
+        # split
+        if self.tci_split_enable != self.split_rxtx:
+          self.tci_split_enable = self.split_rxtx
+          QS.tci_set_params(tci_split_enable=self.tci_split_enable)
+        # tci dds == self.VFO
+        if self.tci_dds != self.VFO:
+          self.tci_dds = self.VFO
+          QS.tci_set_params(tci_dds=self.tci_dds)
+        # tci_vfo == self.VFO + self.rxFreq
+        tci_vfo = self.VFO + self.rxFreq
+        if self.tci_vfo != tci_vfo:
+          self.tci_vfo = tci_vfo
          QS.tci_set_params(tci_vfo=self.tci_vfo)
-        freq = QS.tci_get_params("tci_vfo")
-        if freq is not None:	# TCI frequency
-          self.ChangeRxTxFrequency(freq, None)
-        mode = QS.tci_get_params("tci_modulation")
-        if mode is not None:	# TCI mode
-          self.modeButns.SetLabel(mode, True)
-        split = QS.tci_get_params("tci_split_enable")
-        if split is not None:	# TCI split_enable
-          self.splitButton.SetValue(split, True)
+        # tci_trx handled elsewhere
      if self.is_HermesLite2:
        self.tx_inhibit = QS.get_params('quisk_tx_inhibit')
      else:
@@ -1,7 +1,9 @@
 // This module provides C access to the WDSP SDR library.

 #include <Python.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <complex.h>

 #define CLIP32			2147483647
@@ -0,0 +1 @@
+#
@@ -0,0 +1,569 @@
+# SDR-TRX Quisk Configuration File
+# This file is to integrate the function of control of the SDR-TRX wint Quisk and with WSJT-X.
+# This is for control of the SDR-TRX with using the UDP port port 12346.  WSJT-X interfaces with this
+# locally using UDP on port 2237.  Capital letters begin commands to the SDR-TRX from Quisk, 
+# and lowercase letters are for commands coming from WSJT-X (through this Quisk interface).
+# This is for usinng the SDR-TRX without a 3.5 mm audio card to the soundcard of the computer,
+# and the WSJT-X software using UDP, and the data coming over UDP part 12345 too.
+# It requires the libldl/ directory from weakmon to be in the directory you run this from.
+# It also requires the WSJTXClass.py file from wsjtx_transceiver_interface to be in the lib directory
+# and the version of that class. I have supplied a pruned down versions of ft8.py and ft4.45, because we don't need much
+# other than FT8Send and FT4Send from those files.  You need to edit transceiver_config.yml to have your callsign and grid, etc.
+
+import socket
+import time
+import yaml
+import struct
+import datetime
+import sys
+import os
+from ft8 import FT8Send
+from ft4 import FT4Send
+from quisk_hardware_model import Hardware as BaseHardware
+import struct
+import collections
+import lib.WSJTXClass as WSJTXClass  # To use encoders
+
+sys.path.append(os.path.expandvars('$WEAKMON'))
+
+DEBUG_ON = True
+
+#
+# Define the name of the hardware and the items on the hardware screen (see quisk_conf_defaults.py):
+#
+
+################ Receivers SdrTrx, The SdrTrx radio by Rob Frohne, KL7NA
+## hardware_file_name		Hardware file path, rfile
+# This is the file that contains the control logic for each radio.
+#hardware_file_name = 'sdrtrxpkg/quisk_hardware.py'
+
+## widgets_file_name			Widget file path, rfile
+# This optional file adds additional controls for the radio.
+#widgets_file_name = ''
+
+## si570_xtal_freq			Si570 crystal frequency, integer
+# This is the Si570 startup frequency in Hz.  114.285MHz is the typical
+# value from the data sheet; you can use 'usbsoftrock calibrate' to find
+# the value for your device.
+si570_xtal_freq = 114285000
+
+## rx_max_amplitude_correct		Max ampl correct, number
+# If you get your I/Q samples from a sound card, you will need to correct the
+# amplitude and phase for inaccuracies in the analog hardware.  The correction is
+# entered using the controls from the "Rx Phase" button on the config screen.
+# You must enter a positive number.  This controls the range of the control.
+rx_max_amplitude_correct = 0.2
+
+## rx_max_phase_correct			Max phase correct, number
+# If you get your I/Q samples from a sound card, you will need to correct the
+# amplitude and phase for inaccuracies in the analog hardware.  The correction is
+# entered using the controls from the "Rx Phase" button on the config screen.
+# You must enter a positive number.  This controls the range of the control in degrees.
+rx_max_phase_correct = 10.0
+
+
+# SDR-TRX Hardware Control Class
+#
+
+class Hardware(BaseHardware):
+    # These are "static variable substitutes" since python doesn't have them.
+    # They are shared by all instances of the class and don't get redefinede each time a method is called.
+    # Move these into the Hardware class.
+    # Uncomment these lines if you wish to use Pulseaudio
+    name_of_sound_play = "pulse"
+
+    # Radio's Frequency limits.
+    radio_lower = 3500000
+    radio_upper = 30000000
+    PACKET_SIZE = 1444  # 4 bytes for packet number + 360 * 4 bytes for int32_t pairs
+    # Using 16 bit samples, so 2 bytes per sample.
+
+    # Set the number of Hz the signal is tuned to above the center frequency to avoid 1/f noise.
+    vfo_Center_Offset = 10000
+
+    tx_ready_wsjtx = False
+    tx_ready_wsjtx_sent = False
+    tx_now = False
+
+    # This is the open code for the WSJT server.
+    ft8_encoder = FT8Send()
+    ft4_encoder = FT4Send()
+
+    class Packet:
+        def __init__(self, data):
+            self.number = struct.unpack('<I', data[:4])[0]
+            self.pairs = [struct.unpack('<hh', data[i:i+4]) for i in range(4, len(data), 4)]
+    
+    class PacketQueue:  
+        def __init__(self):
+            self.queue = collections.deque()
+
+        def add_packet(self, packet):
+            self.queue.append(packet)
+            self.queue = collections.deque(sorted(self.queue, key=lambda p: p.number))
+
+        def check_missing_packets(self):
+            for i in range(1, len(self.queue)):
+                if self.queue[i].number != self.queue[i-1].number + 1:
+                    avg_pairs = [((self.queue[i-1].pairs[j][0] + self.queue[i].pairs[j][0]) // 2,
+                                (self.queue[i-1].pairs[j][1] + self.queue[i].pairs[j][1]) // 2)
+                                for j in range(len(self.queue[i-1].pairs))]
+                    self.queue.insert(i, Packet(struct.pack('<I', self.queue[i-1].number + 1) +
+                                                b''.join(struct.pack('<ii', pair[0], pair[1]) for pair in avg_pairs)))
+
+        def get_packets(self):
+            packets = list(self.queue)
+            self.queue.clear()
+            return packets
+
+    def open(self):
+        # Connection for WSJT-X and data
+        self.PICO_UDP_IP = None  # Will be set to the IP of the machine sending data
+        self.COMMAND_UDP_PORT = 12346  # This is the port the Pico listens on for UDP commands coming from quisk.
+        self.DATA_UDP_PORT = 12345  # This is the port the quisk listens on for UDP IQ data coming from the Pico W.
+        self.BROADCAST_PORT = 12347  # This is the port the Pico gets our IP address from.-
+        self.broadcast_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        self.broadcast_sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
+        self.broadcast_message = "Quisk"
+        self.broadcast_sock.setblocking(False)
+        self.isConnected = False
+        self.command_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        self.command_sock.setblocking(False)
+        self.data_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        self.data_sock.bind(('', self.DATA_UDP_PORT))
+        print("Data socket bound to IP:", self.data_sock.getsockname()[0])
+        self.data_sock.setblocking(False)
+        self.establish_connection()
+            
+        self.InitSamples(2, 0)  # Two bytes per sample, little endian.
+        self.queue = self.PacketQueue()
+        time.sleep(2)
+        # Poll for version. Should probably confirm the response on this.
+        version = str(self.get_parameter("VER"))  # The way the firmware is now, this sets it up to use the UART or UDP.
+        # UART is used if get_parameter uses the UART, and UDP is used if it uses the UDP.
+        print(version)
+        # Return an informative message for the config screen
+        t = str(version) + ". Capture from sound card %s." % self.conf.name_of_sound_capt
+        configs_file = open('transceiver_config.yml', 'r')
+        configs = yaml.load(configs_file, Loader=yaml.BaseLoader)
+
+        # Global variables
+        self.callsign = configs['callsign']
+        self.grid = configs['grid']
+        self.current_msg = ''
+        self.rx_callsign = ''
+        self.mode = 'FT8'
+        self.tx_freq = 1200
+
+        # Connection for WSJT-X
+        WSJTX_UDP_IP = "127.0.0.1"  # Assuming you are running WSJT-X on the same computer as Quisk...
+        WSJTX_UDP_PORT = 2237
+        self.wsjtx_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        self.wsjtx_sock.bind((WSJTX_UDP_IP, WSJTX_UDP_PORT))
+        self.wsjtx_sock.setblocking(False)
+
+        self.StartSamples()
+        return t
+
+    def close(self):
+        # Called once to close the Hardware
+        self.get_parameter("RX") # Make sure we are in RX mode.
+        time.sleep(1)  # Wait for RX to be set.
+        self.StopSamples()
+        self.command_sock.close()
+        self.wsjtx_sock.close()
+        self.broadcast_sock.close()
+
+    def ChangeFrequency(self, tune, vfo, source='', band='', event=None):
+        # Called whenever quisk requests a frequency change.
+        # This sends the FREQ command  dto set the centre frequency of the radio,
+        # and will also move the 'tune' frequency (the section within the RX passband
+        # which is to be demodulated) if it falls outside the passband (+/- sample_rate/2).
+        print("Setting VFO to %d, with tune to %d." % (vfo, tune))
+        print("Setting VFO to %d." % vfo)
+        if vfo < self.radio_lower:
+            vfo = self.radio_lower
+            print("Outside range! Setting to %d" % self.radio_lower)
+
+        if vfo > self.radio_upper:
+            vfo = self.radio_upper
+            print("Outside range! Setting to %d" % self.radio_upper)
+
+        # print("sample_rate =", sample_rate)  # I believe sample_rate comes from quisk.
+        # If the tune frequency is outside the RX bandwidth, set it to somewhere within that bandwidth.
+        if tune > (vfo + sample_rate / 2) or tune < (vfo - sample_rate / 2):
+            tune = vfo + self.vfo_Center_Offset
+            print("Bringing tune frequency back into the RX bandwidth.")
+
+        # success = self.set_parameter("FREQ",str(vfo))
+        self.set_parameter("FREQ", str(vfo))
+        self.set_parameter("TX_FREQ", str(tune))
+
+        return tune, vfo
+
+    def OnButtonPTT(self, event):
+        btn = event.GetEventObject()
+        if btn.GetValue():
+            self.get_parameter("TX")
+            print("TX")
+        else:
+            self.get_parameter("RX")
+            print("RX")
+        return BaseHardware.OnButtonPTT(self, event)
+
+
+
+    def establish_connection(self):
+        while not self.isConnected:
+            print("isConnected is: ", self.isConnected)
+            # Check if a connection is established
+            # Wait for data to arrive and set PICO_UDP_IP to the sender's IP
+            while self.PICO_UDP_IP is None:  #  This needs to be fixed.  It continues to send broadcast packets.
+                try:
+                    print("Sending broadcast message...")
+                    self.broadcast_sock.sendto(self.broadcast_message.encode(), ('<broadcast>', self.BROADCAST_PORT))
+                    time.sleep(1)  # Wait for 1 second before sending the next broadcast message
+                except Exception as e:
+                    print("Broadcast message did not work: {0}".format(e))
+                    break
+                try:
+                    data, addr = self.data_sock.recvfrom(self.PACKET_SIZE)  # Adjust the buffer size as needed
+                    self.PICO_UDP_IP = addr[0]
+                    print("PICO_UDP_IP set to:", self.PICO_UDP_IP)
+                    # if data == self.broadcast_message:
+                    self.isConnected = True
+                except socket.error:
+                    if self.PICO_UDP_IP is not None:
+                        print("Connection established with Pico W at IP:", self.PICO_UDP_IP, "but exception occurred.")
+                        break  # Exit the loop if self.PICO_UDP_IP is not None
+                    pass  # No data available yet
+
+    def GetRxSamples(self):
+        # Initialize packet counter and time marker
+        # This routine is made for FT8 and FT4, where we need to send a packet every 15 seconds.
+        # The Pico W sending the data has a sample rate of 48046 samples per second > 48 ks/s.
+        # We made the packets so they carry 180 samples per packet.  That gives 4000 packets 
+        # per 15 seconds.  We discard any packets after that four times a minute at 59, 14, 29, 
+        # and 44 seconds.  This should make four ticks per minute, and we should be able to ignore
+        # # them if we are doing FT8 or FT4.  Something else might be more optimum for other modes.
+
+        packet_counter = 0
+        next_time_marker = 0
+        send_packets = False
+
+        while True:
+            # Check if we've reached the next time marker
+            current_time = time.time()
+            current_seconds = current_time % 60
+
+            # Define the time markers
+            if 59 <= current_seconds < 60:
+                next_time_marker = current_time + 1 - current_seconds
+                send_packets = True
+            elif 14 <= current_seconds < 15:
+                next_time_marker = current_time + 1 - (current_seconds - 14)
+                send_packets = True
+            elif 29 <= current_seconds < 30:
+                next_time_marker = current_time + 1 - (current_seconds - 29)
+                send_packets = True
+            elif 44 <= current_seconds < 45:
+                next_time_marker = current_time + 1 - (current_seconds - 44)
+                send_packets = True
+
+            # If we've reached the next time marker, reset the packet counter
+            if current_time >= next_time_marker and send_packets:
+                packet_counter = 0
+                send_packets = False
+
+            try:
+                data, addr = self.data_sock.recvfrom(self.PACKET_SIZE)
+                self.no_data_repeat = 0
+            except socket.error:
+                # Send a broadcast message to the Pico W to get the IP address in case it has reset.
+                self.broadcast_sock.sendto(self.broadcast_message.encode(), ('<broadcast>', self.BROADCAST_PORT))
+                break  # No more packets available
+
+            packet = self.Packet(data)
+            self.queue.add_packet(packet)
+
+            # Check for missing packets and fill them in
+            self.queue.check_missing_packets()
+
+            # Get the packets and pass them to the processing thread
+            packets = self.queue.get_packets()
+
+            for packet in packets:
+                data = b''.join(struct.pack('<hh', pair[0], pair[1]) for pair in packet.pairs)
+                # if len(data) % 4 != 0:  # Each I/Q pair is now 4 bytes (2 * 2 bytes)
+                #     self.GotReadError(self, DEBUG_ON, "Error: Mismatched number of I and Q samples")
+                #     continue
+                            # If we've already sent 4000 packets since the last time marker, discard the rest
+                if packet_counter >= 4000:
+                    continue
+
+                self.AddRxSamples(data)
+                packet_counter += 1
+
+    #
+    # UDP comms functions, to communicate with the Raspberry Pi Pico W board used in the SDR-TRX.
+    #
+
+    def get_parameter(self, string):
+        string = string + "\n"
+        self.command_sock.sendto(string.encode(), (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+        return self.get_argument()
+
+    def set_parameter(self, string, arg):
+        string = string + "," + arg + "\r" + "\n"
+        self.command_sock.sendto(string.encode(), (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+        print('arg is: ', arg)
+        temp_arg = self.get_argument()
+        print('temp_arg is: ', temp_arg)
+        return True
+
+    def get_argument(self):
+        self.command_sock.setblocking(True)
+        try:
+            data1 = self.command_sock.recv(1024)
+            print('Received on line 178: ', data1)
+        except Exception as e:
+            print("Exception occurred: {0}".format(e))
+            return -1
+        self.command_sock.setblocking(False)
+        if not data1.startswith(b'OK'):
+            print('Received on line 185: ', data1)
+        # Maybe we didn't catch an OK line?
+        else:
+            while True:
+                try:
+                    data1 = self.command_sock.recv(1024)
+                    print('Received on line 190: ', data1)
+                    break
+                except BlockingIOError:
+                    pass
+        # Check to see if we have a comma in the string. If not, there is no argument.
+        if data1.find(b',') == -1:
+            return -1
+
+        data1 = data1.split(b',')[1].rstrip(b'\r\n')
+        print("data1 =")
+        print(data1)
+
+        # Check for the OK string.  Should we wait for the OK string?
+        try:
+            data2 = self.command_sock.recv(1024)
+            if data2.startswith(b'OK'):  
+                return data2
+        except BlockingIOError:
+            return -1
+
+    # We might want to integrate the UDP reads below into the stuff above.
+
+    #  The code below is to interface WSJT-X with SDR-TRX.
+
+    def encode_ft8(self, msg):
+        try:
+            a77 = self.ft8_encoder.pack(msg, 1)
+            symbols = self.ft8_encoder.make_symbols(a77)
+        except Exception as e:
+            print("FT8 encoder error, check message!")
+            print(f"Exception type: {type(e).__name__}")
+            print(f"Exception message: {str(e)}")
+            symbols = None
+            time.sleep(3)
+        return symbols
+
+    def encode_ft4(self, msg):
+        try:
+            a77 = self.ft4_encoder.pack(msg, 1)
+            symbols = self.ft4_encoder.make_symbols(a77)
+        except:
+            print("FT4 encoder error, check message!")
+            symbols = None
+            time.sleep(3)
+        return symbols
+
+    def load_symbols(self, symbols):
+        print("Load symbols into transmitter..")
+        self.command_sock.sendto(b'm', (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+        count = 0
+        for symbol in symbols:
+            self.command_sock.sendto(struct.pack('>B', symbol), (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+            count += 1
+            # Wait to avoid Arduino serial buffer overflow.  This may not be needed with the Pico.
+            if count % 50 == 0:
+                time.sleep(0.05)
+        self.command_sock.sendto(b'\0', (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+        resp = self.command_sock.recv(1)
+        if resp == b'm':
+            print("Load OK")
+        else:
+            print(resp)
+
+    def change_freq(self, new_freq):
+        #global self.tx_freq
+        self.command_sock.setblocking(True)
+        print("Change TX frequency to:", new_freq)
+        self.command_sock.sendto(b'o', (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+        self.command_sock.sendto(struct.pack('<H', new_freq), (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+        time.sleep(0.05)    
+        resp = self.command_sock.recv(1)
+        print("resp after changing offset is: ", resp)
+        self.command_sock.setblocking(False)
+        if resp == b'o':
+            print("New freq OK")
+            self.tx_freq = new_freq
+
+    def set_mode(self, new_mode):  # New more robust protocol.
+        #global mode
+        if new_mode == 'FT8':
+            self.command_sock.sendto(b'e', (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+            time.sleep(.05)
+            resp = self.command_sock.read(1) 
+            print("resp = ", resp)       
+            if resp == b'e':
+                self.mode = new_mode
+                print("Switched to: {0}".format(new_mode)) 
+                self.current_msg = '' 
+                return True
+        elif new_mode == 'FT4':
+            self.command_sock.sendto(b'f', (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+            time.sleep(0.05)
+            resp = self.command_sock.recv(1)
+            print("resp = ", resp)       
+            if resp == b'f':
+                self.mode = new_mode
+                self.current_msg = ''
+                print("Switched to: {0}".format(new_mode))
+                return True
+        else:
+            return False
+
+
+    def new_msg(self, msg):
+        #global self.current_msg
+        #global self.mode
+        if msg != self.current_msg:
+            print("Message: {0}".format(msg))
+            if 'FT8' in self.mode:
+                symbols = self.encode_ft8(msg)
+            else:
+                symbols = self.encode_ft4(msg)
+            if symbols.any():
+                # symbols = [kk for kk in range(79)]
+                self.load_symbols(symbols)
+                self.current_msg = msg
+            else:
+                return
+        else:
+            time.sleep(0.005)  #  Do we need this?
+
+    def transmit(self):
+        if False:  # not current_msg:
+            print("No previous message!")
+            time.sleep(1)
+        else:
+            print("TX!")
+            self.command_sock.sendto(b't', (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+            # self.tx_now = False
+
+    def check_time_window(self, utc_time):
+        time_window = 15 if 'FT8' in self.mode else 7
+        print("Time window: ", time_window)  # Is correct for FT8 and FT4.
+        rm = utc_time.second % time_window
+        if rm > 1 and rm < time_window - 1:  # Within one second of exact time for FT8.
+            return False
+        else:
+            return True
+
+    # See if HeartBeat will work for this:
+    def HeartBeat(self):  # Should be called at 10 Hz from the main.
+        # Check transmitter is initialized
+        #raise Exception("In HeartBeat")
+    
+        # print("\n\nWait for transmitter ready...")
+        if self.tx_ready_wsjtx == False:
+            if self.tx_ready_wsjtx_sent == False:
+                self.command_sock.sendto(b'r', (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+                time.sleep(0.05)
+                self.tx_ready_wsjtx_sent = True
+            while True:
+                try:
+                    x = self.command_sock.recv(1)
+                    if x == b'r':
+                        print("Transmitter ready!")
+                        self.tx_ready_wsjtx = True
+                    break
+                except BlockingIOError:
+                    pass          
+        if self.tx_ready_wsjtx == True:
+            try:
+                fileContent = self.wsjtx_sock.recv(1024)
+            except Exception as e:
+                if e == BlockingIOError:  # This is our way of pollig the socket.
+                    # Maybe use select to stop the errors printing after we quit.
+                    return BaseHardware.HeartBeat(self)
+                else:
+                    # print("Error in HeartBeat")
+                    # print(f"Exception type: {type(e).__name__}")
+                    # print(f"Exception message: {str(e)}")
+                    pass
+            try:
+                NewPacket = WSJTXClass.WSJTX_Packet(fileContent, 0)
+                NewPacket.Decode()
+
+                if NewPacket.PacketType == 1:
+                    # print('New Packet is type 1')
+                    StatusPacket = WSJTXClass.WSJTX_Status(fileContent, NewPacket.index)
+                    StatusPacket.Decode()
+    
+                    # Check TX frequency and update transceiver
+                    new_freq = StatusPacket.TxDF
+                    new_mode = StatusPacket.TxMode.strip()
+                    
+
+                    if new_freq != self.tx_freq:
+                        # time.sleep(0.03)
+                        print('Changing frequency from {0} to {1}'.format(self.tx_freq, new_freq))
+                        try:
+                            self.change_freq(new_freq)
+                        except Exception as e:
+                            print(f"Exception occurred: {e}")
+                        print ('It is now ', self.tx_freq)
+
+                    # print('new_mode', new_mode, ' self.mode is: ', self.mode)
+                    if new_mode != self.mode:  
+                        print("Mode before: {0}".format(self.mode))
+                        self.set_mode(new_mode)
+                        print("New mode after: {0}".format(self.mode))
+
+                    # Check if TX is enabled
+                    if StatusPacket.Transmitting == 1:
+                        # Check time, avoid transmitting out of the time slot
+                        current_time = datetime.datetime.now()
+                        utc_time = current_time.astimezone(datetime.timezone.utc)
+                        self.tx_now = self.check_time_window(utc_time)
+                        if self.tx_now:
+                            self.command_sock.sendto(b'p', (self.PICO_UDP_IP, self.COMMAND_UDP_PORT))
+                        message = StatusPacket.TxMessage
+                        message = message.replace('<', '')
+                        message = message.replace('>', '')
+                        print('Message is: ', message)
+                        self.new_msg(message.strip())
+                        print("Encoded message is: ", self.current_msg)
+                        # print("tx_now is: ", self.tx_now)
+                        if self.tx_now:
+                            print('Transmitting')
+                            self.transmit()
+                        print("Time: {0}:{1}:{2}".format(utc_time.hour, utc_time.minute, utc_time.second))
+                    else:
+                        pass
+                        #  print('Not Transmitting')
+                    return BaseHardware.HeartBeat(self)
+        
+            except Exception as e:
+                # print("Error in HeartBeat")
+                # print(f"Exception type: {type(e).__name__}")
+                # print(f"Exception message: {str(e)}")
+                # traceback.print_exc()
+                return BaseHardware.HeartBeat(self)
@@ -4,14 +4,8 @@ import os

 # This file is used to build the Linux and Mac versions of Quisk. Windows builds are not included.

-# You must define the version here.  A title string including
-# the version will be written to __init__.py and read by quisk.py.
-
-Version = '4.2.52'
-
-fp = open("__init__.py", "w")	# write title string
-fp.write("#Quisk version %s\n" % Version)
-fp.write("from .quisk import main\n")
+fp = open('__init__.py')		# Read in the version
+Version = fp.readline().strip()[15:]
 fp.close()

 sources = ['quisk.c', 'sound.c', 'is_key_down.c', 'microphone.c', 'utility.c',
@@ -1,7 +1,24 @@
+MODULE_NAME := soapy
+OBJDIR := ../build/local

-soapy2:
-	python2 setup.py build_ext --force --inplace
+CFLAGS			:= $(shell python3 ../makefil.py --cflags)
+LDFLAGS			:= $(shell python3 ../makefil.py --ldflags)
+EXTENSION_SUFFIX	:= $(shell python3 ../makefil.py --suffix)
+TARGET := $(MODULE_NAME)$(EXTENSION_SUFFIX)

-soapy3:
+# Default target: Link the shared library object
+$(TARGET): soapy.o $(OBJDIR)/import_quisk_api.o
+	$(CC) -o $@ soapy.o $(LDFLAGS) -lSoapySDR $(OBJDIR)/import_quisk_api.o
+
+# Compile the C source files into object files
+soapy.o: soapy.c ../quisk.h ../filter.h
+	$(CC) -o $@ -c $< $(CFLAGS) -I..
+
+.PHONY: clean
+clean:
+	-rm -f  *.o 
+	-rm -f  $(MODULE_NAME)*.so
+
+.PHONY: soapy-old
+soapy-old:
 	python3 setup.py build_ext --force --inplace
-
@@ -1,5 +1,6 @@
 #include <Python.h>
 #include <complex.h>
+#include <string.h>
 #include <SoapySDR/Device.h>
 #include <SoapySDR/Formats.h>
 #include <SoapySDR/Version.h>
@@ -223,7 +224,7 @@ static PyObject * open_device(PyObject * self, PyObject * args)
 	else {
 		snprintf(buf128, 128, "SoapySDRDevice_make fail: %s", SoapySDRDevice_lastError());
 	}
-	return PyString_FromString(buf128);
+	return PyUnicode_FromString(buf128);
 }

 static void get_direc_len(const char * name, int * direction, int * length)
@@ -254,7 +255,7 @@ static PyObject * get_device_list(PyObject * self, PyObject * args)	// Called fr
 	for (i = 0; i < length; i++) {
 		dict = PyDict_New();
 		for (j = 0; j < results[i].size; j++)
-			PyDict_SetItemString(dict, results[i].keys[j], PyString_FromString(results[i].vals[j]));
+			PyDict_SetItemString(dict, results[i].keys[j], PyUnicode_FromString(results[i].vals[j]));
 		PyList_Append(devices, dict);
 		Py_DECREF(dict);
 	}
@@ -329,7 +330,7 @@ static PyObject * set_parameter(PyObject * self, PyObject * args)	// Called from
 		}
 	}
 	if (msg200[0])
-		return PyString_FromString(msg200);
+		return PyUnicode_FromString(msg200);
 	Py_INCREF (Py_None);
 	return Py_None;
 }
@@ -377,7 +378,7 @@ static PyObject * get_parameter(PyObject * self, PyObject * args)	// Called from
 		pylist = PyList_New(0);
 		names = SoapySDRDevice_listAntennas(sdev, direction, 0, &len_list);
 		for (i = 0; i < len_list; i++) {
-			pyobj = PyString_FromString(names[i]);
+			pyobj = PyUnicode_FromString(names[i]);
 			PyList_Append(pylist, pyobj);
 			Py_DECREF(pyobj);
 		}
@@ -440,7 +441,7 @@ static PyObject * get_parameter(PyObject * self, PyObject * args)	// Called from
 		pylist = PyList_New(0);
 		names = SoapySDRDevice_listGains(sdev, direction, 0, &len_list);
 		for (i = 0; i < len_list; i++) {
-			pyobj = PyString_FromString(names[i]);
+			pyobj = PyUnicode_FromString(names[i]);
 			PyList_Append(pylist, pyobj);
 			Py_DECREF(pyobj);
 		}
@@ -450,7 +451,7 @@ static PyObject * get_parameter(PyObject * self, PyObject * args)	// Called from
 	else if ( ! strncmp(name, "soapy_listGainsValues", length)) {
 		pylist = PyList_New(0);
 		pylst2 = PyList_New(0);		// First element is the total gain
-		pyobj = PyString_FromString("total");
+		pyobj = PyUnicode_FromString("total");
 		PyList_Append(pylst2, pyobj);
 		Py_DECREF(pyobj);
 		range = SoapySDRDevice_getGainRange(sdev, direction, 0);
@@ -460,7 +461,7 @@ static PyObject * get_parameter(PyObject * self, PyObject * args)	// Called from
 		names = SoapySDRDevice_listGains(sdev, direction, 0, &len_list);
 		for (i = 0; i < len_list; i++) {
 			pylst2 = PyList_New(0);
-			pyobj = PyString_FromString(names[i]);
+			pyobj = PyUnicode_FromString(names[i]);
 			PyList_Append(pylst2, pyobj);
 			Py_DECREF(pyobj);
 			range = SoapySDRDevice_getGainElementRange(sdev, direction, 0, names[i]);
@@ -4,6 +4,7 @@
 #define PY_SSIZE_T_CLEAN
 #include <Python.h>
 #include <complex.h>
+#include <string.h>
 #include <math.h>
 #include <sys/time.h>
 #include <time.h>
@@ -986,6 +987,8 @@ int quisk_read_sound(void)	// Called from sound thread
 	// Perhaps replace the samples with samples from a file
 	if (quisk_record_state == FILE_PLAY_SAMPLES)
 		quisk_play_samples(cSamples, nSamples);
+	// Send radio IQ samples to TCI
+	tci_send_iq(cSamples, nSamples);
 #if ! DEBUG_MIC
 	nSamples = quisk_process_samples(cSamples, nSamples);
 #endif
@@ -2,6 +2,7 @@
 * This modue provides sound access for QUISK using the ALSA
 * library for Linux.
 */
+#include <string.h>
 #ifdef QUISK_HAVE_ALSA
 #include <Python.h>
 #include <complex.h>
@@ -454,7 +455,7 @@ static int device_list(PyObject * py, snd_pcm_stream_t stream, char * name)
 			}
 			snprintf(buf100, 100, "%s %s (hw:%d,%d)", card_text, pcm_text, card, dev);
 			if (py) {		// add to list of devices
-				PyList_Append(py, PyString_FromString(buf100));
+				PyList_Append(py, PyUnicode_FromString(buf100));
 			}
 			if (name) {		// return the "hw:" name
 				if (strstr(buf100, name)) {
@@ -1129,10 +1130,10 @@ static void midi_in_devices(PyObject * pylist, int just_names)
 					}
 					else {
 						pytup = PyTuple_New(2);
-						PyList_Append(pylist, pytup);
-						PyTuple_SET_ITEM(pytup, 0, PyUnicode_DecodeUTF8(friendly_name, strlen(friendly_name), "replace"));
+						PyTuple_SetItem(pytup, 0, PyUnicode_DecodeUTF8(friendly_name, strlen(friendly_name), "replace"));
 						snprintf(card_name, 32, "hw:%d,%d,%d", card, device, sub);
-						PyTuple_SET_ITEM(pytup, 1, PyUnicode_DecodeUTF8(card_name, strlen(card_name), "replace"));
+						PyTuple_SetItem(pytup, 1, PyUnicode_DecodeUTF8(card_name, strlen(card_name), "replace"));
+						PyList_Append(pylist, pytup);
 					}
 				}
 			}
@@ -1,3 +1,5 @@
+#include <string.h>
+
 #ifdef QUISK_HAVE_DIRECTX

 #include <Python.h>
@@ -55,14 +57,7 @@ static int match_name(LPCTSTR lpszDesc, const char * name)
 		Py_DECREF(py_unicode);
 		return 0;
 	}
-#if PY_MAJOR_VERSION >= 3
-	if (PyUnicode_READY(py_unicode) == 0)
-		length = PyUnicode_GET_LENGTH(py_unicode);
-	else
-		length = 0;
-#else
-	length = PyUnicode_GET_SIZE(py_unicode);
-#endif
+	length = PyUnicode_GetLength(py_unicode);
 	if (length <= 0) {
 		Py_DECREF(py_unicode);
 		Py_DECREF(py_substring);
@@ -1,6 +1,8 @@
 /*
 * This module provides sound access for QUISK using the portaudio library.
 */
+#include <string.h>
+
 #ifdef QUISK_HAVE_PORTAUDIO

 #include <Python.h>
@@ -475,7 +477,7 @@ static int device_list(PyObject * py, int input)
                // found one
                if (py) {
                    snprintf(buf100, 100, "%s", info->name);
-					PyList_Append(py, PyString_FromString(buf100));
+					PyList_Append(py, PyUnicode_FromString(buf100));
                } 
            }
        }
@@ -34,6 +34,8 @@
 * 2020 Apr by N2ADR Changes in printf's
 */

+#include <string.h>
+
 #ifdef QUISK_HAVE_PULSEAUDIO

 #include <Python.h>
@@ -1030,20 +1032,20 @@ static void source_sink(const char * name, const char * descr, pa_proplist * pro
 	PyObject * pytup;

 	pytup = PyTuple_New(3);
-	PyList_Append(pylist, pytup);
-	PyTuple_SET_ITEM(pytup, 0, PyString_FromString(name));
-	PyTuple_SET_ITEM(pytup, 1, PyString_FromString(descr));
+	PyTuple_SetItem(pytup, 0, PyUnicode_FromString(name));
+	PyTuple_SetItem(pytup, 1, PyUnicode_FromString(descr));
 	value = pa_proplist_gets(props, "device.api");
    
 	if (value && ! strcmp(value, "alsa")) {
 		snprintf(buf300, 300, "%s %s (hw:%s,%s)", pa_proplist_gets(props, "alsa.card_name"), pa_proplist_gets(props, "alsa.name"),
 			 pa_proplist_gets(props, "alsa.card"), pa_proplist_gets(props, "alsa.device"));

-		PyTuple_SET_ITEM(pytup, 2, PyString_FromString(buf300));
+		PyTuple_SetItem(pytup, 2, PyUnicode_FromString(buf300));
 	}
 	else {
-		PyTuple_SET_ITEM(pytup, 2, PyString_FromString(""));
+		PyTuple_SetItem(pytup, 2, PyUnicode_FromString(""));
 	}
+	PyList_Append(pylist, pytup);
 }


@@ -1074,7 +1076,7 @@ static void index_callback(pa_context *c, uint32_t idx, void *userdata) {
    //printf("%u\n", idx);
 }

-PyObject * quisk_pulseaudio_sound_devices(PyObject * self, PyObject * args)
+PyObject * quisk_pulseaudio_sound_devices(PyObject * self, PyObject * args)	// Called from the GUI thread
 {	// Return a list of PulseAudio device names [pycapt, pyplay]
 	PyObject * pylist, * pycapt, * pyplay;
 	pa_mainloop *pa_names_ml;
@@ -7,6 +7,9 @@
 * Note that there is NO WARRANTY AT ALL.  USE AT YOUR OWN RISK!!

 */
+
+#include <string.h>
+
 #ifdef QUISK_HAVE_WASAPI

 #define UNICODE
@@ -1125,10 +1128,10 @@ PyObject * quisk_wasapi_sound_devices(PyObject * self, PyObject * args)		// Call
 		EXIT_ON_ERROR(hr)
 		// data items are (name, id, is_raw)
 		pytup = PyTuple_New(3);
+		PyTuple_SetItem(pytup, 0, PyUnicode_FromWideChar(varName.pwszVal, -1));
+		PyTuple_SetItem(pytup, 1, PyUnicode_FromWideChar(pwszID, -1));
+		PyTuple_SetItem(pytup, 2, PyInt_FromLong(1));
 		PyList_Append(pyplay, pytup);
-		PyTuple_SET_ITEM(pytup, 0, PyUnicode_FromWideChar(varName.pwszVal, -1));
-		PyTuple_SET_ITEM(pytup, 1, PyUnicode_FromWideChar(pwszID, -1));
-		PyTuple_SET_ITEM(pytup, 2, PyInt_FromLong(1));
 		CoTaskMemFree(pwszID);
 		pwszID = NULL;
 		PropVariantClear(&varName);
@@ -1155,10 +1158,10 @@ PyObject * quisk_wasapi_sound_devices(PyObject * self, PyObject * args)		// Call
 		EXIT_ON_ERROR(hr)
 		// data items are (name, id, is_raw)
 		pytup = PyTuple_New(3);
+		PyTuple_SetItem(pytup, 0, PyUnicode_FromWideChar(varName.pwszVal, -1));
+		PyTuple_SetItem(pytup, 1, PyUnicode_FromWideChar(pwszID, -1));
+		PyTuple_SetItem(pytup, 2, PyInt_FromLong(1));
 		PyList_Append(pycapt, pytup);
-		PyTuple_SET_ITEM(pytup, 0, PyUnicode_FromWideChar(varName.pwszVal, -1));
-		PyTuple_SET_ITEM(pytup, 1, PyUnicode_FromWideChar(pwszID, -1));
-		PyTuple_SET_ITEM(pytup, 2, PyInt_FromLong(1));
 		CoTaskMemFree(pwszID);
 		pwszID = NULL;
 		PropVariantClear(&varName);
@@ -2,36 +2,37 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <string.h>
 #include "ws.h"
 #include <pthread.h>
 #include <complex.h>
 #include <time.h>
 #include "quisk.h"
+#include "filter.h"

 #define TCI_STREAM_DATA_BYTES	16384
 #define TCI_RX_BUF_SIZE		1024
-#define TCI_COMMAND_SIZE	32
+#define TCI_COMMAND_SIZE	64
+#define BAD_TCI_IF		999999999

 static int verbose;	// non-zero for verbose log messages
 static int tci_port;

 // Implement the ExpertSDR2 Version 1.4 protocol:
-// The only sample rate is 48000. The Tx audio parameters are copied from the Rx audio stream.
+// The Tx audio parameters are copied from the Rx audio stream.
 // The only sample type is FLOAT32 type 3.
-// WSJT-X RX_AUDIO_STREAM must be two channels and Stream.length is the number of floats (not samples).
-// WSJT-X TX_AUDIO_STREAM always returns two channels and Stream.length is the number of floats (not samples).
-// WSJT-X TX_AUDIO_STREAM is twice as long, but the data is in the first half and garbage is in the second half.
-// WSJT-X TX_CHRONO Stream.length is the number of floats, and the returned TX_AUDIO_STREAM length is equal to it.
 // It is unclear whether Stream.length is the number of floats, or half that for two channels. And version 1.4 lacks Stream.channels.
 // The protocol name for TCI version 1.4 is "protocol:ESDR,1.4;" and the port is 40001.
 // The protocol name for TCI version 2.0 is "protocol:ExpertSDR3,2.0;" and the port is 50001.
 // The TCI modulations are: am, sam, dsb, lsb, usb, cw, nfm, wfm, spec, digl, digu, drm.

 // These are TCI parameters:
-//static int64_t quisk_dds;
-//static int quisk_if;
+static long long quisk_dds;
+static long long client_dds=-1;
 static long long quisk_vfo;
 static long long client_vfo=-1;
+static int quisk_if;
+static int client_if=BAD_TCI_IF;
 static int quisk_trx;
 static int client_trx=-1;
 static int quisk_split_enable;
@@ -79,6 +80,11 @@ struct ClientData {	// data for each client
 	int audio_stream_channels;
 	int audio_stream_samples;
 	int audio_stream_bytes_per_sample;
+	struct quisk_cHB45Filter HalfBand1;
+	struct quisk_cFilter filtDecim3;
+	struct quisk_cFilter filtDecim48to24;
+	int send_IQ_stream;
+	int IQ_stream_samplerate;
 } ;

 struct _Stream {
@@ -132,11 +138,11 @@ struct _StreamTypes StreamTypes[NUM_STREAM_TYPES] = {
 	{"lineout  ", 0}
 } ;

-static void PrintStream(const char * msg, size_t size)
+static void PrintStream(const char * msg, size_t size, int always)
 {
 	struct _Stream * pt = (struct _Stream *)msg;

-	if (time(NULL) - StreamTypes[pt->type].when > 5) {
+	if (always || time(NULL) - StreamTypes[pt->type].when > 5) {
 		StreamTypes[pt->type].when = time(NULL);
 		if (pt->type == TX_AUDIO_STREAM)
 			QuiskPrintf("TCI     Receiving %slength %5d:", StreamTypes[pt->type].name, (int)size);
@@ -164,7 +170,7 @@ static int sendframe_txt_bcast(uint16_t port, const char * msg)
 static size_t sendframe_bin(ws_cli_conn_t client, const char * msg, size_t size)
 {
 	if (verbose)
-		PrintStream(msg, size);
+		PrintStream(msg, size, 0);
 	return ws_sendframe_bin(client, msg, size);
 }

@@ -177,8 +183,12 @@ static int text_message(ws_cli_conn_t client, struct ClientData * ctx)

 	if (verbose)
 		QuiskPrintf("TCI     Received text      %s\n", ctx->msg_buf);
-	for (i = 0; ctx->msg_buf[i]; i++)
+		//QuiskPrintf("TCI     Received text      %s %20.6lf\n", ctx->msg_buf, QuiskTimeSec());
+	for (i = 0; ctx->msg_buf[i]; i++) {
+		char_buf[i] = ctx->msg_buf[i];		// make a copy of the command
 		ctx->msg_buf[i] = tolower(ctx->msg_buf[i]);
+	}
+	char_buf[i] = 0;
 	command = strtok_r(ctx->msg_buf, ":", &saveptr);
 	if (command == NULL)
 		return 0;
@@ -193,10 +203,19 @@ static int text_message(ws_cli_conn_t client, struct ClientData * ctx)
 			for (i = 0; i < tci_clients_count; i++) {
 				if (tci_clients_list[i] == client) {
 					ctx->send_Rx_audio_stream = 1;
+					memset(&ctx->HalfBand1,
+						0, sizeof(struct quisk_cHB45Filter));
+					quisk_filt_cInit(&ctx->filtDecim3,
+						quiskFilt144D3Coefs, sizeof(quiskFilt144D3Coefs)/sizeof(double));
+					quisk_filt_cInit(&ctx->filtDecim48to24,
+						quiskFilt48dec24Coefs, sizeof(quiskFilt48dec24Coefs)/sizeof(double));
+
 					break;
 				}
 			}
 			pthread_mutex_unlock(&clients_list_mutex);
+			sendframe_txt(client, char_buf);
+			return 0;
 		}
 		else if (strcmp(command, "audio_stop") == 0) {
 			pthread_mutex_lock(&clients_list_mutex);
@@ -207,19 +226,24 @@ static int text_message(ws_cli_conn_t client, struct ClientData * ctx)
 				}
 			}
 			pthread_mutex_unlock(&clients_list_mutex);
+			sendframe_txt(client, char_buf);
+			return 0;
 		}
 		else if (strcmp(command, "audio_stream_sample_type") == 0) {
 			if (strcmp(arg1, "float32") == 0) {
 				ctx->audio_stream_sample_type = TCI_FLOAT32;
 				ctx->audio_stream_bytes_per_sample = 4;
+				sendframe_txt(client, char_buf);
 			}
-			else {
-				return 0;
-			}
+			return 0;
 		}
 		else if (strcmp(command, "audio_samplerate") == 0) {
-			if (atoi(arg1) != 48000)
+			i = atoi(arg1);
+			if (i != 48000 && i != 24000 && i != 12000 && i != 8000)
 				return 0;
+			ctx->audio_stream_samplerate = i;
+			sendframe_txt(client, char_buf);
+			return 0;
 		}
 		else if (strcmp(command, "audio_stream_channels") == 0) {
 			if (strcmp(arg1, "1") == 0)
@@ -228,23 +252,74 @@ static int text_message(ws_cli_conn_t client, struct ClientData * ctx)
 				ctx->audio_stream_channels = 2;
 			else
 				return 0;
+			sendframe_txt(client, char_buf);
+			return 0;
 		}
 		else if (strcmp(command, "audio_stream_samples") == 0) {
 			return 0;	// do not send
 		}
 		break;
+	case 'd':
+		if (strcmp(command, "dds") == 0) {
+			if (arg2) {
+				client_dds = atoll(arg2);
+				// Echo comes from quisk_tci_set_params()
+			}
+			else {
+				snprintf(char_buf, TCI_COMMAND_SIZE, "dds:0,%lld;", quisk_dds);
+				sendframe_txt(client, char_buf);
+			}
+			return 0;
+		}
+		break;
 	case 'i':
-		if (strcmp(command, "iq_start") == 0)
-			return 0;	// do not send
-		else if (strcmp(command, "iq_stop") == 0)
-			return 0;	// do not send
-		else if (strcmp(command, "iq_samplerate") == 0)
-			return 0;	// do not send
+		if (strcmp(command, "iq_start") == 0) {
+			pthread_mutex_lock(&clients_list_mutex);
+			for (i = 0; i < tci_clients_count; i++) {
+				if (tci_clients_list[i] == client) {
+					ctx->send_IQ_stream = 1;
+					break;
+				}
+			}
+			pthread_mutex_unlock(&clients_list_mutex);
+			sendframe_txt(client, char_buf);
+			return 0;
+		}
+		else if (strcmp(command, "iq_stop") == 0) {
+			pthread_mutex_lock(&clients_list_mutex);
+			for (i = 0; i < tci_clients_count; i++) {
+				if (tci_clients_list[i] == client) {
+					ctx->send_IQ_stream = 0;
+					break;
+				}
+			}
+			pthread_mutex_unlock(&clients_list_mutex);
+			sendframe_txt(client, char_buf);
+			return 0;
+		}
+		else if (strcmp(command, "iq_samplerate") == 0) {
+			ctx->IQ_stream_samplerate = quisk_sound_state.sample_rate;
+			snprintf(char_buf, TCI_COMMAND_SIZE, "iq_samplerate:%d;", quisk_sound_state.sample_rate);
+			sendframe_txt(client, char_buf);
+			return 0;
+		}
+		else if (strcmp(command, "if") == 0) {
+			if (arg3) {
+				client_if = atoi(arg3);
+				// Echo comes from quisk_tci_set_params()	UNIMPLEMENTED
+			}
+			else {
+				snprintf(char_buf, TCI_COMMAND_SIZE, "if:0,0,%d;", quisk_if);
+				sendframe_txt(client, char_buf);
+			}
+			return 0;
+		}
 		break;
 	case 'm':
 		if (strcmp(command, "modulation") == 0) {
 			if (arg2) {
 				strncpy(client_modulation, arg2, TCI_COMMAND_SIZE - 1);
+				// Echo comes from quisk_tci_set_params()
 			}
 			else {
 				snprintf(char_buf, TCI_COMMAND_SIZE, "modulation:0,%.9s;", quisk_modulation);
@@ -260,6 +335,7 @@ static int text_message(ws_cli_conn_t client, struct ClientData * ctx)
 					client_split_enable = 1;
 				else
 					client_split_enable = 0;
+				// Echo comes from quisk_tci_set_params()
 			}
 			else {
 				if (quisk_split_enable)
@@ -291,6 +367,7 @@ static int text_message(ws_cli_conn_t client, struct ClientData * ctx)
 					client_trx = 0;
 					tci_tx_audio_client = 0;
 				}
+				// Echo comes from quisk_tci_set_params()
 			}
 			else {
 				if (quisk_trx)
@@ -308,6 +385,7 @@ static int text_message(ws_cli_conn_t client, struct ClientData * ctx)
 		if (strcmp(command, "vfo") == 0) {
 			if (arg3) {
 				client_vfo = atoll(arg3);
+				// Echo comes from quisk_tci_set_params()
 			}
 			else {
 				snprintf(char_buf, TCI_COMMAND_SIZE, "vfo:0,0,%lld;", quisk_vfo);
@@ -330,7 +408,9 @@ static void onopen(ws_cli_conn_t client)
 	ctx = malloc(sizeof(struct ClientData));
 	ctx->msg_length = 0;
 	ctx->send_Rx_audio_stream = 0;
+	ctx->send_IQ_stream = 0;
 	ctx->audio_stream_samplerate = 48000;
+	ctx->IQ_stream_samplerate = quisk_sound_state.sample_rate;
 	ctx->audio_stream_sample_type = TCI_FLOAT32;
 	ctx->audio_stream_channels = 2;
 	ctx->audio_stream_samples = 0;
@@ -348,7 +428,9 @@ static void onopen(ws_cli_conn_t client)

 	sendframe_txt(client, "protocol:ESDR,1.4;");
 	//sendframe_txt(client, "vfo_limits:30000,30000000;");  Not known due to transverters
-	//sendframe_txt(client, "if_limits:-48000,48000;");
+	int if_limit = quisk_sound_state.sample_rate / 2;
+	snprintf(command, TCI_COMMAND_SIZE, "if_limits:%d,%d;", - if_limit, if_limit);
+	sendframe_txt(client, command);
 	sendframe_txt(client, "trx_count:1;");
 	sendframe_txt(client, "channel_count:1;");
 	sendframe_txt(client, "device:QuiskSDR;");
@@ -358,10 +440,10 @@ static void onopen(ws_cli_conn_t client)

 	sendframe_txt(client, "start;");
 	sendframe_txt(client, "tx_enable:0,true;");
-	//snprintf(command, TCI_COMMAND_SIZE, "dds:0,%d;", quisk_dds);
-	//sendframe_txt(client, command);
-	//snprintf(command, TCI_COMMAND_SIZE, "if:0,0,%d;", quisk_if);
-	//sendframe_txt(client, command);
+	snprintf(command, TCI_COMMAND_SIZE, "dds:0,%lld;", quisk_dds);
+	sendframe_txt(client, command);
+	snprintf(command, TCI_COMMAND_SIZE, "if:0,0,%d;", quisk_if);
+	sendframe_txt(client, command);
 	snprintf(command, TCI_COMMAND_SIZE, "modulation:0,%.9s;", quisk_modulation);
 	sendframe_txt(client, command);
 	snprintf(command, TCI_COMMAND_SIZE, "vfo:0,0,%lld;", quisk_vfo);
@@ -471,7 +553,7 @@ static void onmessage(ws_cli_conn_t client, const unsigned char *msg, uint64_t s
 					break;
 				case TCI_FLOAT32:
 					// Version 1.4 does not return the number of channels. We assume two channels.
-					// pt->length is the number of floats in WSJT-X.
+					// pt->length is the number of floats
 					while (vpt < vpt_end && count < pt->length) {
 						re = *(float *)vpt;
 						vpt += sizeof(float);
@@ -499,7 +581,7 @@ static void onmessage(ws_cli_conn_t client, const unsigned char *msg, uint64_t s
 			}
 		}
 		if (verbose)
-			PrintStream((const char *)msg, size);
+			PrintStream((const char *)msg, size, 0);

 	}

@@ -529,11 +611,37 @@ static void tci_startup(void)
 	return;
 }

+static int decimate_audio_stream(complex double * cSamples, int nSamples, struct ClientData * ctx)
+{
+	switch(ctx->audio_stream_samplerate) {		// Starting audio rate is 48000
+		case 48000:
+			break;
+		case 24000:
+			nSamples = quisk_cDecimate(cSamples, nSamples, &ctx->filtDecim48to24, 2);
+			break;
+		case 12000:
+			nSamples = quisk_cDecim2HB45(cSamples, nSamples, &ctx->HalfBand1);
+			nSamples = quisk_cDecimate(cSamples, nSamples, &ctx->filtDecim48to24, 2);
+			break;
+		case 8000:
+			nSamples = quisk_cDecim2HB45(cSamples, nSamples, &ctx->HalfBand1);
+			nSamples = quisk_cDecimate(cSamples, nSamples, &ctx->filtDecim3, 3);
+			break;
+		default:
+			nSamples = 0;
+			break;
+	}
+	return nSamples;
+}
+
 void tci_send_audio(complex double * cSamples, int nSamples)	// called from the sound thread
 {
 	int i, n;
 	struct _Stream stream;
 	struct ClientData * ctx;
+	static complex double * cCopy = NULL;
+	static int cCopy_size = 0;
+	complex double * cAudio;

 	if (tci_clients_count <= 0)
 		return;
@@ -555,15 +663,29 @@ void tci_send_audio(complex double * cSamples, int nSamples)	// called from the
 		int bytes_per_sample = ctx->audio_stream_bytes_per_sample;
 		void * vpt = &stream.data;
 		void * vpt_end = vpt + TCI_STREAM_DATA_BYTES;
+		if (ctx->audio_stream_samplerate != 48000) {	// decimation must not change cSamples
+			if (cCopy_size < nSamples) {
+				if (cCopy)
+					free(cCopy);
+				cCopy_size = nSamples * 2;
+				cCopy = (complex double *)malloc(cCopy_size * sizeof(complex double));
+			}
+			memcpy(cCopy, cSamples, nSamples * sizeof(complex double));
+			nSamples = decimate_audio_stream(cCopy, nSamples, ctx);
+			cAudio = cCopy;
+		}
+		else {
+			cAudio = cSamples;
+		}
 		switch (ctx->audio_stream_sample_type) {
 		case TCI_FLOAT32:
 			stream.length = 0;	// make a frame
 			for (i = 0; i < nSamples; i++) {
-				*(float *)vpt = (float)(creal(cSamples[i]) * (1.0 / 2147483648.0 / 2));
+				*(float *)vpt = (float)(creal(cAudio[i]) * (1.0 / 2147483648.0 / 2));
 				vpt += bytes_per_sample;
 				stream.length++;
 				if (two_channels) {
-					*(float *)vpt = (float)(cimag(cSamples[i]) * (1.0 / 2147483648.0 / 2));
+					*(float *)vpt = (float)(cimag(cAudio[i]) * (1.0 / 2147483648.0 / 2));
 					vpt += bytes_per_sample;
 					stream.length++;
 				}
@@ -571,6 +693,7 @@ void tci_send_audio(complex double * cSamples, int nSamples)	// called from the
 					sendframe_bin(tci_clients_list[n], (const char *)&stream,
 						(16 * sizeof(uint32_t) + stream.length * bytes_per_sample));
 					stream.length = 0;
+					vpt = &stream.data;
 				}
 			}
 			break;
@@ -579,6 +702,58 @@ void tci_send_audio(complex double * cSamples, int nSamples)	// called from the
 	pthread_mutex_unlock(&clients_list_mutex);
 }

+void tci_send_iq(complex double * cSamples, int nSamples)	// called from the sound thread
+{
+	int i, n;
+	struct _Stream stream;
+	struct ClientData * ctx;
+
+	if (tci_clients_count <= 0)
+		return;
+
+	if (nSamples <= 0)
+		return;
+
+	pthread_mutex_lock(&clients_list_mutex);
+	for (n = 0; n < tci_clients_count; n++) {
+		ctx = ws_get_connection_context(tci_clients_list[n]);
+		if (ctx->send_IQ_stream == 0)
+			continue;
+		memset(&stream, 0, 16 * sizeof(uint32_t));
+		stream.sample_rate = ctx->IQ_stream_samplerate;
+		stream.format = ctx->audio_stream_sample_type;
+		stream.type = IQ_STREAM;
+		stream.channels = 2;
+		int bytes_per_sample = ctx->audio_stream_bytes_per_sample;
+		void * vpt = &stream.data;
+		void * vpt_end = vpt + TCI_STREAM_DATA_BYTES;
+		int original_length = nSamples;
+		switch (ctx->audio_stream_sample_type) {
+		case TCI_FLOAT32:
+			stream.length = 0;	// make a frame
+			for (i = 0; i < nSamples; i++) {
+				*(float *)vpt = (float)(creal(cSamples[i]) * (1.0 / 2147483648.0 / 2));
+				vpt += bytes_per_sample;
+				stream.length++;
+				*(float *)vpt = (float)(cimag(cSamples[i]) * (1.0 / 2147483648.0 / 2));
+				vpt += bytes_per_sample;
+				stream.length++;
+				if (vpt >= vpt_end || i == nSamples - 1) {
+					sendframe_bin(tci_clients_list[n], (const char *)&stream,
+						(16 * sizeof(uint32_t) + stream.length * bytes_per_sample));
+					original_length -= stream.length / 2;
+					stream.length = 0;
+					vpt = &stream.data;
+				}
+			}
+			break;
+		}
+		if (verbose && original_length != 0)
+			QuiskPrintf("Error in tci_send_iq: Samples remain %d\n", original_length);
+	}
+	pthread_mutex_unlock(&clients_list_mutex);
+}
+
 int tci_get_mic(complex double * cSamples, int mic_count)	// called from the sound thread
 {
 	if (tci_tx_audio_client) {
@@ -608,16 +783,17 @@ int tci_get_mic(complex double * cSamples, int mic_count)	// called from the sou
 PyObject * quisk_tci_set_params(PyObject * self, PyObject * args, PyObject * keywds)	// called from the GUI thread
 {  /* Call with keyword arguments ONLY.
      Sent from Quisk when parameters change. Broadcast the change to clients.*/
-	static char * kwlist[] = {"start", "verbose", "tci_dds", "tci_if", "tci_vfo", "tci_trx", "tci_split_enable",
+	static char * kwlist[] = {"start", "close", "verbose", "tci_dds", "tci_if", "tci_vfo", "tci_trx", "tci_split_enable",
 		"tci_modulation", NULL} ;
 	long long new_vfo=-1;
 	long long new_dds=-1;
-	int start=-1, new_if=-1, new_trx=-1, new_split_enable=-1;
+	int start=-1, close=-1, new_trx=-1, new_split_enable=-1;
+	int new_if = BAD_TCI_IF;
 	char * mode=NULL;
 	char char_buf[TCI_COMMAND_SIZE];

-	if (!PyArg_ParseTupleAndKeywords (args, keywds, "|iiLiLiis", kwlist,
-			&start, &verbose, &new_dds, &new_if, &new_vfo, &new_trx, &new_split_enable,
+	if (!PyArg_ParseTupleAndKeywords (args, keywds, "|iiiLiLiis", kwlist,
+			&start, &close, &verbose, &new_dds, &new_if, &new_vfo, &new_trx, &new_split_enable,
 			&mode))
 		return NULL;
 	if (start == 1) {
@@ -628,6 +804,19 @@ PyObject * quisk_tci_set_params(PyObject * self, PyObject * args, PyObject * key
 		Py_INCREF (Py_None);
 		return Py_None;
 	}
+	if (close != -1) {
+		sendframe_txt_bcast(tci_port, "stop;");
+	}
+	if (new_dds != -1) {
+		quisk_dds = new_dds;
+		snprintf(char_buf, TCI_COMMAND_SIZE, "dds:0,%lld;", quisk_dds);
+		sendframe_txt_bcast(tci_port, char_buf);
+	}
+	if (new_if != BAD_TCI_IF) {
+		quisk_if = new_if;
+		snprintf(char_buf, TCI_COMMAND_SIZE, "if:0,0,%d;", quisk_if);
+		sendframe_txt_bcast(tci_port, char_buf);
+	}
 	if (new_vfo != -1) {
 		quisk_vfo = new_vfo;
 		snprintf(char_buf, TCI_COMMAND_SIZE, "vfo:0,0,%lld;", quisk_vfo);
@@ -683,6 +872,10 @@ PyObject * quisk_tci_get_params(PyObject * self, PyObject * args)	// called from

 	if (!PyArg_ParseTuple (args, "s", &name))
 		return NULL;
+
+	if (strcmp(name, "tci_clients_count") == 0)
+		return PyLong_FromLong(tci_clients_count);
+
 	if (tci_started == 0) {
 	}
 	else if (strcmp(name, "tci_vfo") == 0 && client_vfo >= 0) {
@@ -690,6 +883,16 @@ PyObject * quisk_tci_get_params(PyObject * self, PyObject * args)	// called from
 		client_vfo = -1;
 		return PyLong_FromLongLong(ll);
 	}
+	else if (strcmp(name, "tci_dds") == 0 && client_dds >= 0) {
+		ll = client_dds;
+		client_dds = -1;
+		return PyLong_FromLongLong(ll);
+	}
+	else if (strcmp(name, "tci_if") == 0 && client_if != BAD_TCI_IF) {
+		ii = client_if;
+		client_if = BAD_TCI_IF;
+		return PyLong_FromLong(ii);
+	}
 	else if (strcmp(name, "tci_split_enable") == 0 && client_split_enable >= 0) {
 		ii = client_split_enable;
 		client_split_enable = -1;
@@ -718,7 +921,7 @@ PyObject * quisk_tci_get_params(PyObject * self, PyObject * args)	// called from
 			strcpy(char_buf, "FM");
 		client_modulation[0] = 0;
 		if (char_buf[0])
-			return PyString_FromString(char_buf);
+			return PyUnicode_FromString(char_buf);
 	}
 	Py_INCREF (Py_None);
 	return Py_None;
@@ -6,6 +6,7 @@
 #include <sys/time.h>
 #endif
 #include <complex.h>
+#include <string.h>
 #include "quisk.h"

 // Access to config file attributes.
@@ -71,40 +72,27 @@ double QuiskGetConfigDouble(const char * name, double deflt)

 char * QuiskGetConfigString(const char * name, char * deflt)
 {  // Return the UTF-8 configuration string. Return deflt for failure.
-  char * res;
-  PyObject * attr;
-#if PY_MAJOR_VERSION < 3
-  static char retbuf[QUISK_SC_SIZE];
-#endif
+	Py_ssize_t size;

-  if (!quisk_pyConfig || PyErr_Occurred())
-    return deflt;
-  attr = PyObject_GetAttrString(quisk_pyConfig, name);
-  if (attr) {
-#if PY_MAJOR_VERSION >= 3
-    res = (char *)PyUnicode_AsUTF8(attr);
-#else
-    if (PyUnicode_Check(attr)) {
-      PyObject * pystr = PyUnicode_AsUTF8String(attr);
-      strMcpy(retbuf, PyString_AsString(pystr), QUISK_SC_SIZE);
-      retbuf[QUISK_SC_SIZE - 1] = 0;
-      res = retbuf;
-      Py_DECREF(pystr);
-    }
-    else {
-      res = PyString_AsString(attr);
-    }
-#endif
-    Py_DECREF(attr);
-    if (res)
-      return res;		// success
-    else
-      PyErr_Clear();
-  }
-  else {
-    PyErr_Clear();
-  }
-  return deflt;		// failure
+	if (!quisk_pyConfig || PyErr_Occurred())
+		return deflt;		// failure
+	PyObject * attr = PyObject_GetAttrString(quisk_pyConfig, name);
+	if ( ! attr) {
+		PyErr_Clear();
+		return deflt;		// failure
+	}
+	if ( ! PyUnicode_Check(attr)) {
+		Py_DECREF(attr);
+		return deflt;		// failure
+	}
+	const char * utf8_str = PyUnicode_AsUTF8AndSize(attr, &size);
+	if ( ! utf8_str) {
+		Py_DECREF(attr);
+		PyErr_Clear();
+		return deflt;		// failure
+	}
+	Py_DECREF(attr);
+	return (char *)utf8_str;
 }

 double QuiskTimeSec(void)