Publish refactoring (#298)

* factoring of the publishing function
* integration of json publishing to MQTT
* receiving and transcode json messages from mqtt
* replace the TRACE runtime condition by a buildtime one so as to decrease program size
* remove retainFlag parameter not necessary for the moment
* Increase the scope of tests for arduino mega and esp32
* Update arduinojson library to 5.13.3
* add macros to choose between simple or json publishing or both
* differentiate build test for ATmega2560
* correct wrong sprintf definition
* change IDE version for continuous integration
* let default warning level in arduino ide
* correct pins for ESP32
* reorganize user_config

ZactuatorONOFF.ino

@@ -38,22 +38,41 @@ void setupONOFF(){
   trc(F("ZactuatorONOFF setup done "));
 }
 
-void MQTTtoONOFF(char * topicOri, char * datacallback){
-
-  bool boolSWITCHTYPE;
-  boolSWITCHTYPE = to_bool(datacallback);
-  String topic = topicOri;
- 
-  if ((topic == subjectMQTTtoONOFF)){
-    trc(F("MQTTtoONOFF"));
-    trc(boolSWITCHTYPE);
-    digitalWrite(ACTUATOR_ONOFF_PIN, boolSWITCHTYPE);
-    boolean result = client.publish(subjectGTWONOFFtoMQTT, datacallback);// we acknowledge the sending by publishing the value to an acknowledgement topic
-    if (result){
-      trc(F("MQTTtoONOFF ack pub."));
-      trc(datacallback);
+#ifdef simplePublishing
+  void MQTTtoONOFF(char * topicOri, char * datacallback){
+  
+    bool boolSWITCHTYPE;
+    boolSWITCHTYPE = to_bool(datacallback);
+    String topic = topicOri;
+   
+    if (topic == subjectMQTTtoONOFF){
+      trc(F("MQTTtoONOFF data analysis"));
+      trc(boolSWITCHTYPE);
+      digitalWrite(ACTUATOR_ONOFF_PIN, boolSWITCHTYPE);
+      // we acknowledge the sending by publishing the value to an acknowledgement topic
+      pub(subjectGTWONOFFtoMQTT, datacallback);
     }
   }
-}
 #endif
 
+#ifdef jsonPublishing
+  void MQTTtoONOFF(char * topicOri, JsonObject& ONOFFdata){
+   
+    String topic = topicOri;
+   
+    if (topic == subjectMQTTtoONOFF){
+      trc(F("MQTTtoONOFF json data analysis"));
+      int boolSWITCHTYPE = ONOFFdata["switchType"] | 99;
+      if (boolSWITCHTYPE != 99) {
+        trc(F("MQTTtoONOFF boolSWITCHTYPE ok"));
+        trc(boolSWITCHTYPE);
+        digitalWrite(ACTUATOR_ONOFF_PIN, boolSWITCHTYPE);
+        // we acknowledge the sending by publishing the value to an acknowledgement topic
+        pub(subjectGTWONOFFtoMQTT, ONOFFdata);
+      }else{
+        trc(F("MQTTtoONOFF Fail reading from json"));
+      }
+    }
+  }
+#endif
+#endif