-- coding: utf_8 --

import serial
import modbus_tk.defines as cst
from modbus_tk import modbus_rtu

def main():
master = modbus_rtu.RtuMaster(serial.Serial(port="COM9",
baudrate=38400, bytesize=8, parity='N', stopbits=1))
master.set_timeout(5.0)
master.set_verbose(True)

    red = master.execute(1, cst.READ_HOLDING_REGISTERS, 64012, 1)  # 这里可以修改需要读取的功能码
    print(red)

if name == "main":
main()

return:

Traceback (most recent call last):
File "D:\WorkSpace\Test\main.py", line 20, in
main()
File "D:\WorkSpace\Test\main.py", line 15, in main
red = master.execute(1, cst.READ_HOLDING_REGISTERS, 64012, 1) # 这里可以修改需要读取的功能码
File "D:\WorkSpace\Test\venv\lib\site-packages\modbus_tk\utils.py", line 39, in new
raise excpt
File "D:\WorkSpace\Test\venv\lib\site-packages\modbus_tk\utils.py", line 37, in new
ret = fcn(*args, **kwargs)
File "D:\WorkSpace\Test\venv\lib\site-packages\modbus_tk\modbus.py", line 356, in execute
response_pdu = query.parse_response(response)
File "D:\WorkSpace\Test\venv\lib\site-packages\modbus_tk\modbus_rtu.py", line 60, in parse_response
raise ModbusInvalidResponseError("Invalid CRC in response")
modbus_tk.exceptions.ModbusInvalidResponseError: Invalid CRC in response

from modbus-tk.

same question

from modbus-tk.