change lora settings to increase range

collar.cpp

@@ -174,7 +174,7 @@ void setup()
   // define multi-channel sending
   lora.setChannel(MULTI);
   // set datarate
-  lora.setDatarate(SF7BW125);
+  lora.setDatarate(SF12BW125); // SF7BW125
   if(!lora.begin())
   {
     Serial.println("Failed");
@@ -187,7 +187,7 @@ void setup()
   // For safe operation in 20dBm: your antenna must be 3:1 VWSR or better
   // and respect the 1% duty cycle.
 
-  lora.setPower(1);
+  lora.setPower(15); // 1
 
   // start 1 second timer
   TCCR1A = 0;