#!/usr/bin/env python3 # # Test: Read device ID # -------------------- # Read device ID # # # This functionality is not implemented in minimalmodbus, # so we have to emulate it (using serial) # import serial serial_file = '/dev/rs485' address = 247 baudrate = 19200 s = serial.Serial(serial_file, baudrate) # first test: read company ID msg = [ address, 0x2B, # Function code 0x0E, # MEI type 0x01, # Read device ID code (get basic identification) 0x14, # object ID 0xbc, # CRC8 MSB 0xda # CRC8 LSB ] msg = bytes([1,2,3,4,5,6,7,8,9,10]) s.write(msg) response = s.read() print(response)