add config for spreading factor, signal bandwith and coding rate 4

src/LoRa_APRS_iGate.cpp

@@ -365,6 +365,9 @@ void setup_lora()
 		while (1);
 	}
 	lora_aprs.setTxPower(Config.lora.power);
+	lora_aprs.setSpreadingFactor(Config.lora.spreadingFactor);
+	lora_aprs.setSignalBandwidth(Config.lora.signalBandwidth);
+	lora_aprs.setCodingRate4(Config.lora.codingRate4);
 	Serial.println("[INFO] LoRa init done!");
 	show_display("INFO", "LoRa init done!", 2000);
 

src/configuration.cpp

@@ -69,6 +69,12 @@ Configuration ConfigurationManagement::readConfiguration()
 		conf.display.timeout      = data["display"]["timeout"];
 		conf.display.overwritePin = data["display"]["overwrite_pin"];
 	}
+	if(data["version"] >= 3)
+	{
+		conf.lora.spreadingFactor = data["lora"]["spreading_factor"];
+		conf.lora.signalBandwidth = data["lora"]["signal_bandwidth"];
+		conf.lora.codingRate4     = data["lora"]["coding_rate4"];
+	}
 
 	return conf;
 }
@@ -110,6 +116,9 @@ void ConfigurationManagement::writeConfiguration(Configuration conf)
 	data["lora"]["frequency_rx"]            = conf.lora.frequencyRx;
 	data["lora"]["frequency_tx"]            = conf.lora.frequencyTx;
 	data["lora"]["power"]                   = conf.lora.power;
+	data["lora"]["spreading_factor"]        = conf.lora.spreadingFactor;
+	data["lora"]["signal_bandwidth"]        = conf.lora.signalBandwidth;
+	data["lora"]["coding_rate4"]            = conf.lora.codingRate4;
 	data["display"]["always_on"]            = conf.display.alwaysOn;
 	data["display"]["timeout"]              = conf.display.timeout;
 	data["display"]["overwrite_pin"]        = conf.display.overwritePin;

src/configuration.h

@@ -62,11 +62,14 @@ public:
 	class LoRa
 	{
 	public:
-		LoRa() : frequencyRx(433775000), frequencyTx(433775000), power(20) {}
+		LoRa() : frequencyRx(433775000), frequencyTx(433775000), power(20), spreadingFactor(12), signalBandwidth(125000), codingRate4(5) {}
 
 		long frequencyRx;
 		long frequencyTx;
 		int power;
+		int spreadingFactor;
+		long signalBandwidth;
+		int codingRate4;
 	};
 
 	class Display