Issue storing QR in EEPROM and transmitting over RS485

Put in Serial.print statements to see what the functions readStringFromEEPROM and scanUUID, etc. are doing internally.

For example in scanUUID:

  if (newData) {
  Serial.print("scanUUID: ");  //debug
  Serial.println(uuid);
    FeederUUID = String(uuid);

In readStringFromEEPROM:

  int len = EEPROM.read(addrOffset);
  Serial.print("EEPROM returned len ");
  Serial.println(len);