References : https://gist.github.com/xandfury/626e7849422e8757e8fa1c16403e22ee https://circuitdigest.com/microcontroller-projects/rs-485-modbus-serial-communication-with-arduino-as-master https://circuitdigest.com/microcontroller-projects/rs485-modbus-serial-communication-using-arduino-uno-as-slave