send a log message to the client when a device fails

htdocs/openwebrx.js

@@ -1142,6 +1142,9 @@ function on_ws_recv(evt) {
                     case 'secondary_demod':
                         secondary_demod_push_data(json['value']);
                         break;
+                    case 'log_message':
+                        divlog(json['value'], true);
+                        break;
                     default:
                         console.warn('received message of unknown type: ' + json['type']);
                 }

owrx/connection.py

@@ -185,7 +185,9 @@ class OpenWebRxReceiverClient(Client):
             self.startDsp()
 
             # keep trying until we find a suitable SDR
-            if self.sdr.getState() != SdrSource.STATE_FAILED:
+            if self.sdr.getState() == SdrSource.STATE_FAILED:
+                self.write_log_message("SDR device \"{0}\" has failed, selecting new device".format(self.sdr.getName()))
+            else:
                 break
 
         # send initial config
@@ -308,6 +310,9 @@ class OpenWebRxReceiverClient(Client):
     def write_aprs_data(self, data):
         self.send({"type": "aprs_data", "value": data})
 
+    def write_log_message(self, message):
+        self.send({"type": "log_message", "value": message})
+
     def write_sdr_error(self, message):
         self.send({"type": "sdr_error", "value": message})