python检测光电感烟火灾探测报警器
2021/5/6 14:55:17
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import serial # 引入库 import threading # python 定时器 import platform # 系统 import modbus_tk.modbus_rtu as rtu import modbus_tk.defines as cst try: sys = platform.system() if sys == "Windows": ser = serial.Serial(port='COM6', baudrate=9600, bytesize=8, parity="N", stopbits=1, timeout=0.1) # 设置电脑端为主机(Master) master = rtu.RtuMaster(ser) master.set_timeout(1.0) master.set_verbose(True) elif sys == "Linux": ser = serial.Serial(port='/dev/ttyUSB1', baudrate=9600, bytesize=8, parity="N", stopbits=1, timeout=0.1) # 设置电脑端为主机(Master) master = rtu.RtuMaster(ser) master.set_timeout(1.0) master.set_verbose(True) else: print("系统错误") except Exception as e: print("串口系统错误") def fun_timer(): read_values = master.execute(1, cst.HOLDING_REGISTERS, 0x01, 12) # 烟感设备地址 1 # print(read_values) # (0, 0, 0, 0, 0, 0, 259, 0, 0, 0, 0, 0) # print(read_values[2]) # (0, 0, 1, 0, 0, 0, 259, 0, 0, 0, 0, 0) # 报警器状态说明: # 报警器状态代码: 0 或 1 # 报警器状态: 0 代表 正常没有烟雾 1 代表有烟报警 if read_values[2] == 0: print('检测没有烟雾正常') else: print('检测到烟雾并报警') global timer timer = threading.Timer(1, fun_timer) timer.start() timer = threading.Timer(1, fun_timer) timer.start()
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