Active Receiver Switching (#936)

* PR #934

* Active Receiver Switching

Switching of the active receiver module is available between the RF,
RF2, RTL_433 and Pilight Gateway modules, allowing for changing of
signal decoders without redploying the openMQTTGateway package.
Sending a JSON message to the command topic of the desired receiver
will change the active receiver module.

Other minor adjustments/improvements

1 - Improved startup serial logging that includes
- OpenMQTTGateway Version
- OpenMQTTGateway Modules

2 - Trace logging of full Gateway module command topic
 - Enabled in RF, RF2, PiLight and RTL_433

3 - Updated RTL_433 Documentation to only include enabled ASK/OOK
device decoders

4 - Trace logging of MQTT Callback topic

* Regression testing

* Adding valueAsASubject support to rtl_433_ESP
- model and id keys are appended to message topic

* Increased memory size for receiver switching in blocking build all

Co-authored-by: Northern Man <sgracey@Heisenberg.local>

main/ZgatewayRF.ino

@@ -70,6 +70,7 @@ void setupRF() {
 #  endif
   mySwitch.setRepeatTransmit(RF_EMITTER_REPEAT);
   mySwitch.enableReceive(RF_RECEIVER_GPIO);
+  Log.trace(F("ZgatewayRF command topic: %s%s" CR), mqtt_topic, subjectMQTTtoRF);
   Log.trace(F("ZgatewayRF setup done" CR));
 }
 
@@ -204,42 +205,67 @@ void MQTTtoRF(char* topicOri, JsonObject& RFdata) { // json object decoding
       pub(subjectGTWRFtoMQTT, RFdata); // we acknowledge the sending by publishing the value to an acknowledgement topic, for the moment even if it is a signal repetition we acknowledge also
       mySwitch.setRepeatTransmit(RF_EMITTER_REPEAT); // Restore the default value
     } else {
+      bool success = false;
+      if (RFdata.containsKey("active")) {
+        Log.trace(F("RF active:" CR));
+        activeReceiver = ACTIVE_RF;
+        success = true;
+      }
 #    ifdef ZradioCC1101 // set Receive on and Transmitt off
       float tempMhz = RFdata["mhz"];
-      if (tempMhz != 0 && validFrequency((int)tempMhz)) {
+      if (RFdata.containsKey("mhz") && validFrequency(tempMhz)) {
         receiveMhz = tempMhz;
         Log.notice(F("Receive mhz: %F" CR), receiveMhz);
+        success = true;
+      }
+#    endif
+      if (success) {
         pub(subjectGTWRFtoMQTT, RFdata); // we acknowledge the sending by publishing the value to an acknowledgement topic, for the moment even if it is a signal repetition we acknowledge also
       } else {
+#    ifndef ARDUINO_AVR_UNO // Space issues with the UNO
         pub(subjectGTWRFtoMQTT, "{\"Status\": \"Error\"}"); // Fail feedback
+#    endif
         Log.error(F("MQTTtoRF Fail json" CR));
       }
-#    else
-#      ifndef ARDUINO_AVR_UNO // Space issues with the UNO
-      pub(subjectGTWRFtoMQTT, "{\"Status\": \"error\"}"); // Fail feedback
-#      endif
-      Log.error(F("MQTTtoRF Fail json" CR));
-#    endif
     }
+    enableActiveReceiver();
   }
-#    ifdef ZradioCC1101 // set Receive on and Transmitt off
-  ELECHOUSE_cc1101.SetRx(receiveMhz);
-  mySwitch.disableTransmit();
-  mySwitch.enableReceive(RF_RECEIVER_GPIO);
-#    endif
 }
 #  endif
-#endif
 
-#ifdef ZradioCC1101
-bool validFrequency(int mhz) {
-  //  CC1101 valid frequencies 300-348 MHZ, 387-464MHZ and 779-928MHZ.
-  if (mhz >= 300 && mhz <= 348)
-    return true;
-  if (mhz >= 387 && mhz <= 464)
-    return true;
-  if (mhz >= 779 && mhz <= 928)
-    return true;
-  return false;
+int receiveInterupt = -1;
+
+void disableRFReceive() {
+  Log.trace(F("disableRFReceive %d" CR), receiveInterupt);
+  if (receiveInterupt != -1) {
+    receiveInterupt = -1;
+    mySwitch.disableReceive();
+  }
+}
+
+void enableRFReceive() {
+#  ifdef ZradioCC1101
+  Log.notice(F("Switching to RF Receiver: %F" CR), receiveMhz);
+#  else
+  Log.notice(F("Switching to RF Receiver" CR));
+#  endif
+#  ifndef ARDUINO_AVR_UNO // Space issues with the UNO
+#    ifdef ZgatewayPilight
+  disablePilightReceive();
+#    endif
+#    ifdef ZgatewayRTL_433
+  disableRTLreceive();
+#    endif
+#  endif
+#  ifdef ZgatewayRF2
+  disableRF2Receive();
+#  endif
+
+#  ifdef ZradioCC1101 // set Receive on and Transmitt off
+  ELECHOUSE_cc1101.SetRx(receiveMhz);
+#  endif
+  mySwitch.disableTransmit();
+  receiveInterupt = RF_RECEIVER_GPIO;
+  mySwitch.enableReceive(RF_RECEIVER_GPIO);
 }
 #endif