Trouble porting LoRa+Nano project to Attiny85 (Serial Comm Issue?)

Projects General Guidance
22

This would be the simple way if you're only interested if you ever receive an 'A'.

  // Flash an LED if Acknowledgement is received from Receiver
  if (LoraSerial.available())
  {
    char c = LoraSerial.read();
    if(c == 'A')
    {
      ack = true;
      digitalWrite(recLed, HIGH);
      delay(250);
      digitalWrite(recLed, LOW);

    }
  }

No use of the String class :wink: Although I do not think that it's the problem in this case. Also see the Serial Input Basics tutorial posted by @jremington.

You can save some RAM by using LoraSerial.println(F("AT+SEND=715,1,H")); and LoraSerial.println(F("AT+SEND=715,1,L"));.