七、Modbus工具

先安装modbus_tk和serial.感谢梁工替我写的这个工具

# -*- coding: utf-8 -*-"""Spyder EditorThis is a temporary script file."""from modbus_tk import defines as funCodefrom modbus_tk.modbus_rtu import RtuServerimport serialimport timefrom modbus_tk import hooks#server = RtuServer(serial.Serial(port='/dev/tty.wchusbserial1420', baudrate=115200, bytesize=8, parity='N', stopbits=1, xonxoff=0))# server = RtuServer(serial.Serial(port=0, baudrate=38400, bytesize=8, parity='N', stopbits=1, xonxoff=0))slave = server.add_slave(1)def before_handle_request_hook(argument):#     print('modbus_rtu.RtuServer.before_write')        data = argument[1]    strData = 'RX: '    for i in argument[1]:        strData = strData + '0x%02x ' %(i)    print(strData)def after_handle_request_hook(argument):#     print('modbus_rtu.RtuServer.after_read')      strData = 'TX: '    for i in argument[1]:        strData = strData + '0x%02x ' %(i)    print(strData)def slave_init():    slave.add_block('holdingReg', funCode.HOLDING_REGISTERS, 0x2000, 20)    hooks.install_hook('modbus.Server.before_handle_request', before_handle_request_hook)    hooks.install_hook('modbus.Server.after_handle_request', after_handle_request_hook)def slave_poll():    server.start()    print('server.start....')    while True:        data = slave.get_values('holdingReg', 0x2000, 20)        #print(type(data))        data = data        time.sleep(1)def slave_stop():    server.stop()if __name__ == '__main__':    slave_init()    try:        slave_poll()    except KeyboardInterrupt:        slave_stop()