Fix ESPiLight transmission error reporting (#762)

main/ZgatewayPilight.ino

@@ -101,26 +101,21 @@ void MQTTtoPilight(char* topicOri, JsonObject& Pilightdata) {
   ELECHOUSE_cc1101.SetTx(CC1101_FREQUENCY); // set Transmit on
   rf.disableReceiver();
 #  endif
-  int result = 0;
-
   if (cmpToMainTopic(topicOri, subjectMQTTtoPilight)) {
     Log.trace(F("MQTTtoPilight json data analysis" CR));
     const char* message = Pilightdata["message"];
     const char* protocol = Pilightdata["protocol"];
     const char* raw = Pilightdata["raw"];
     if (raw) {
-      int msgLength = 0;
       uint16_t codes[MAXPULSESTREAMLENGTH];
-      msgLength = rf.stringToPulseTrain(
-          raw,
-          codes, MAXPULSESTREAMLENGTH);
+      int msgLength = rf.stringToPulseTrain(
+          raw, codes, MAXPULSESTREAMLENGTH);
       if (msgLength > 0) {
         rf.sendPulseTrain(codes, msgLength);
         Log.notice(F("MQTTtoPilight raw ok" CR));
-        result = msgLength;
       } else {
         Log.trace(F("MQTTtoPilight raw KO" CR));
-        switch (result) {
+        switch (msgLength) {
           case ESPiLight::ERROR_INVALID_PULSETRAIN_MSG_C:
             Log.trace(F("'c' not found in string, or has no data" CR));
             break;
@@ -134,19 +129,16 @@ void MQTTtoPilight(char* topicOri, JsonObject& Pilightdata) {
             Log.trace(F("pulse type not defined" CR));
             break;
         }
+        Log.error(F("Invalid JSON: raw data malformed" CR));
       }
     } else if (message && protocol) {
       Log.trace(F("MQTTtoPilight msg & protocol ok" CR));
-      result = rf.send(protocol, message);
-    } else {
-      Log.error(F("MQTTtoPilight failed json read" CR));
-    }
-
-    if (result > 0) {
+      int msgLength = rf.send(protocol, message);
+      if (msgLength > 0) {
         Log.trace(F("Adv data MQTTtoPilight push state via PilighttoMQTT" CR));
         pub(subjectGTWPilighttoMQTT, Pilightdata);
       } else {
-      switch (result) {
+        switch (msgLength) {
           case ESPiLight::ERROR_UNAVAILABLE_PROTOCOL:
             Log.error(F("protocol is not available" CR));
             break;
@@ -160,10 +152,12 @@ void MQTTtoPilight(char* topicOri, JsonObject& Pilightdata) {
             Log.error(F("no transmitter pin" CR));
             break;
           default:
-          Log.error(F("invalid json data, can't read raw or message/protocol" CR));
-          break;
+            Log.error(F("Invalid JSON: can't read message/protocol" CR));
         }
       }
+    } else {
+      Log.error(F("MQTTtoPilight failed json read" CR));
+    }
   }
 #  ifdef ZradioCC1101
   ELECHOUSE_cc1101.SetRx(CC1101_FREQUENCY); // set Receive on