Fix send frequencies

Author: ango1994

manager/libs/applications/compatibility/exercise_wrapper.py

@@ -53,14 +53,11 @@ def __init__(self, exercise_command, gui_command, update_callback):
             self.gui_server.kill()
             raise RuntimeError(f"Exercise GUI {gui_command} could not be run")
 
-        self.running = True
-
-        self.start_send_freq_thread()
 
 
     def send_freq(self, exercise_connection, is_alive):
         """Send the frequency of the brain and gui to the exercise server"""
-        while is_alive():
+        while self.running:
             exercise_connection.send(
                 """#freq{"brain": 20, "gui": 10, "rtf": 100}""")
             time.sleep(1)
@@ -71,9 +68,16 @@ def send_pick(self, data):
 
     def start_send_freq_thread(self):
         """Start a thread to send the frequency of the brain and gui to the exercise server"""
-        daemon = Thread(target=lambda: self.send_freq(self.exercise_connection,
+        self.running = True
+        self.send_freq_thread = Thread(target=lambda: self.send_freq(self.exercise_connection,
                         lambda: self.is_alive), daemon=False, name='Monitor frequencies')
-        daemon.start()
+        self.send_freq_thread.start()
+
+    def stop_send_freq_thread(self):
+        """Stop the thread sending the frequency of the brain and gui to the exercise server"""
+        if self.running:
+            self.running = False
+            self.send_freq_thread.join()
 
     def _run_exercise_server(self, cmd, log_file, load_string, timeout: int = 5):
         process = subprocess.Popen(f"{cmd}", shell=True, stdout=sys.stdout, stderr=subprocess.STDOUT,
@@ -131,7 +135,7 @@ def pause(self):
 
     def restart(self):
         # Terminate current processes
-        self.running= False
+        self.stop_send_freq_thread()
         home_dir = os.path.expanduser('~')
         stop_process_and_children(self.exercise_server)
         try:
@@ -142,7 +146,9 @@ def restart(self):
         process_ready,self.exercise_server = self._run_exercise_server(f"python {self.exercise_command}",
                                                                         f'{home_dir}/ws_code.log',
                                                                         'websocket_code=ready')
-        self.running= True
+        if process_ready:
+            self.start_send_freq_thread()
+       
 
 
     @property