[LORA] Fix message without json not being transmitted (1technophile#1875)

Fix LoRa not processing message that are not JSON
Add also a non-JSON-message to the example

Author: 1technophile

examples/LoraTemperature/README.md

@@ -1,5 +1,6 @@
 # OpenMQTTGateway LoRa Node Example
 This repository contains an example of a LoRa node program designed for the ESP32 platform. The program reads the internal temperature of the ESP32, packages the data into a JSON format, and sends it over LoRa.
+It also sends a constant raw string simulating a Makerfab Soil sensor payload.
 
 ## Features:
 * Uses an SX12XX LoRa module.

examples/LoraTemperature/platformio.ini

@@ -27,7 +27,7 @@ lib_deps =
 monitor_speed = 115200
 
 [env:heltec-wifi-lora-32]  ; Heltec ESP32 Board with SSD1306 display
-platform = ${com.esp32_platform}
+platform = espressif32
 board = heltec_wifi_lora_32
 framework = arduino
 lib_deps =

examples/LoraTemperature/src/main.cpp

@@ -90,13 +90,24 @@ void loop() {
   LoRa.print(msg);
   LoRa.endPacket();
 
-  Serial.println(String(msg));
+  Serial.println(msg);
 
   display.drawString(0, 15, String(NodeId));
   display.drawString(0, 30, "tempc: " + String(temp) + " C");
   display.display();
 
+  delay(5000);
+
+  // Send makerfab soil sensor example packet
+  LoRa.beginPacket();
+  String msg2 = "ID010770 REPLY : SOIL INEDX:5862 H:100.00 T:1.77 ADC:624 BAT:857";
+  LoRa.print(msg2);
+  LoRa.endPacket();
+
+  Serial.println(msg2);
+
   counter++;
+
   digitalWrite(2, HIGH); // turn the LED on (HIGH is the voltage level)
   delay(1000); // wait for a second
   digitalWrite(2, LOW); // turn the LED off by making the voltage LOW

main/ZgatewayLORA.ino

@@ -428,9 +428,13 @@ void LORAtoMQTT() {
     } else {
       // ascii payload
       std::string packetStrStd = (char*)packet;
-      auto error = deserializeJson(LORAdataBuffer, packetStrStd);
-      if (error) {
-        Log.error(F("LORA packet deserialization failed: %s, buffer capacity: %u" CR), error.c_str(), LORAdataBuffer.capacity());
+      auto result = deserializeJson(LORAdataBuffer, packetStrStd);
+      if (result) {
+        Log.notice(F("LORA packet deserialization failed, not a json, sending raw message" CR));
+        LORAdata = LORAdataBuffer.to<JsonObject>();
+        LORAdata["message"] = (char*)packet;
+      } else {
+        Log.trace(F("LORA packet deserialization OK" CR));
       }
     }
 
@@ -453,6 +457,7 @@ void LORAtoMQTT() {
     } else {
       LORAdataBuffer["origin"] = subjectLORAtoMQTT;
     }
+
     handleJsonEnqueue(LORAdata);
     if (repeatLORAwMQTT) {
       Log.trace(F("Pub LORA for rpt" CR));