[SERIAL] Enable SERIAL to X communication (#2068)

Add Serial as a communication layer so as to transmit data to/from serial
Enable discovery of BT sensors through serial
Add serial heartbeat

Change discovery principle for interval and intervalacts, keep them always discovered and deactivate adaptivescan when changed. Instead of removing their discovery when adaptive scan is activated

Increase JSON_MSG_BUFFER_MAX as we are now using const char* and it requires more memory for Arduino Json Deserialization

Co-authored-by: Florian <1technophile@users.noreply.github.com>

main/ZgatewayIR.ino

@@ -102,7 +102,7 @@ void setupIR() {
   Log.trace(F("ZgatewayIR setup done " CR));
 }
 
-void IRtoMQTT() {
+void IRtoX() {
   decode_results results;
 
   if (irrecv.decode(&results)) {
@@ -162,7 +162,7 @@ void IRtoMQTT() {
 bool sendIdentifiedProtocol(const char* protocol_name, uint64_t data, const char* hex, unsigned int valueBITS, uint16_t valueRPT);
 
 #  if jsonReceiving
-void MQTTtoIR(char* topicOri, JsonObject& IRdata) {
+void XtoIR(const char* topicOri, JsonObject& IRdata) {
   if (cmpToMainTopic(topicOri, subjectMQTTtoIR)) {
     Log.trace(F("MQTTtoIR json" CR));
     uint64_t data = IRdata["value"];
@@ -245,7 +245,8 @@ void MQTTtoIR(char* topicOri, JsonObject& IRdata) {
       }
       if (signalSent) { // 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
         Log.notice(F("MQTTtoIR OK" CR));
-        pub(subjectGTWIRtoMQTT, IRdata);
+        IRdata["origin"] = subjectGTWIRtoMQTT;
+        enqueueJsonObject(IRdata);
       }
       irrecv.enableIRIn(); // ReStart the IR receiver (if not restarted it is not able to receive data)
     } else {