Fix controller to serial "None" option as None correctly.

controllers/mattchbox_usb.py

@@ -38,6 +38,7 @@ class MattchBox(Controller):
         # Allow server config changes to trigger controller reload if required.
         self.port = None
         self.next_port = self.server_state.get()["serial_port"]
+        self.logger.log.info("Server config gives port as: {}".format(self.next_port))
 
         self.server_from_q = server_from_q
         self.server_to_q = server_to_q
@@ -57,10 +58,13 @@ class MattchBox(Controller):
             self.port = None
             self.next_port = new_port
 
-    def connect(self, port: Optional[str]):
-        # If we loose the controller, make sure to set channels live, so we tracklist.
+    def _disconnected(self):
+        # If we lose the controller, make sure to set channels live, so we tracklist.
         for i in range(len(self.server_from_q)):
             self.sendToPlayer(i, "SETLIVE:True")
+        self.server_state.update("ser_connected", False)
+
+    def connect(self, port: Optional[str]):
 
         if port:
             # connect to serial port
@@ -71,8 +75,10 @@ class MattchBox(Controller):
                 self.logger.log.info("Connected to serial port {}".format(port))
             except serial.SerialException as e:
                 self.logger.log.error(
-                    "Could not open serial port {}: {}".format(port, e)
+                    "Could not open serial port" + str(port),
+                    e
                 )
+                self._disconnected()
                 self.ser = None
         else:
             self.ser = None
@@ -89,7 +95,7 @@ class MattchBox(Controller):
                     )  # Endianness doesn't matter for 1 byte.
                     self.logger.log.info("Received from controller: " + str(line))
                     if line == 255:
-                        self.ser.write(b"\xff")  # Send 255 back
+                        self.ser.write(b"\xff")  # Send 255 back, this is a keepalive.
                     elif line in [51,52,53]:
                         # We've received a status update about fader live status, fader is down.
                         self.sendToPlayer(line-51, "SETLIVE:False")
@@ -108,7 +114,7 @@ class MattchBox(Controller):
 
             elif self.port:
                 # If there's still a port set, just wait a moment and see if it's been reconnected.
-                self.server_state.update("ser_connected", False)
+                self._disconnected()
                 time.sleep(10)
                 self.connect(self.port)
 
@@ -116,7 +122,7 @@ class MattchBox(Controller):
                 # We're not already connected, or a new port connection is to be made.
                 if self.ser:
                     self.ser.close()
-                    self.server_state.update("ser_connected", False)
+                    self._disconnected()
 
                 if self.next_port is not None:
                     self.connect(self.next_port)

web_server.py

@@ -164,7 +164,9 @@ def ui_config_server_update(request):
     server_state.update("port", int(request.form.get("port")))
     server_state.update("num_channels", int(request.form.get("channels")))
     server_state.update("ws_port", int(request.form.get("ws_port")))
-    server_state.update("serial_port", request.form.get("serial_port"))
+
+    serial_port = request.form.get("serial_port")
+    server_state.update("serial_port", None if serial_port == "None" else serial_port)
 
     # Because we're not showing the api key once it's set.
     if "myradio_api_key" in request.form and request.form.get("myradio_api_key") != "":