We will use two devices, which contain this processor: Moduino ESP32 and Pycom. Both devices are running in MicroPytthon environment. Our Modbus Slave will be PC computer with Modbus simulator software running on it.
You will need:
- Moduino ESP32 or Moduino Pycom device (check this website to find out more about Moduino ESP32 device and this to check Pycom device)
- PC with Linux operating system
- RS-232/RS-485 port in your computer or USB to RS-232/RS-485 converter
You can read the complete tutorial at Instructables.com: