[Python知识库]对某个负载仪进行的协议检测和改造

买了个负载仪，DL24数控可调恒流放电负载，想测试间隔放电，发现没有这个功能，但是其可以通过串口进行控制，就用串口监听找到协议（单向开环的也没什么验证），任何用python控制它定时进行开关，或者进行阶梯放电

import serial
import threading
import schedule
import time

s0 = serial.Serial("COM7", 9600)  # PC端

command_power = {
            'switch_on': [  
                        ('B1 B2 01 01 00 B6'), #开
                        ('B1 B2 02 05 00 B6'), #5A
                        ],
            'switch_off': [
                        ('B1 B2 01 00 00 B6'), #关
                        ('B1 B2 02 00 06 B6'), # 60mA
                        ],
                }

# main thread
def TXData():  #
    creatCTR = threading.Thread(target=SetThread)
    creatCTR.start()

def SetThread():
    threadCTR = threading.Thread(target=setDL24)
    threadCTR.start()
    while True:
        if not threadCTR.is_alive():
            threadCTR = threading.Thread(target=setDL24)
            threadCTR.start()
        time.sleep(60)




def sendCtrOrder(ctrSta,ctrNum):
     hex = bytes.fromhex(command_power['switch_on'][ctrNum])
     print(time.strftime("%H:%M:%S", time.localtime()))
     print('开 下发数据:', hex)
     s0.write(hex)

     time.sleep(1)

     hex = bytes.fromhex(command_power['switch_off'][ctrNum])
     print(time.strftime("%H:%M:%S", time.localtime()))
     print('关 下发数据:', hex)
     s0.write(hex)

def ctrSwitch1(ctrSta): 
    sendCtrOrder(ctrSta, 0)   #0 开关； 1 幅度


def setDL24():
    print('thread creat')

    ctrStaOn = 'switch_on'
    ctrStaOff = 'switch_off'

    schedule.every(4).seconds.do(ctrSwitch1, ctrStaOn)
#    schedule.every(10).seconds.do(ctrSwitch1, ctrStaOff)

    while True:
       schedule.run_pending()
             
       time.sleep(1)

#  主函数
if __name__ == '__main__':
    TXData()
    pass

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