#读取10s串口数据后关闭这个串口importtimedefread_serial(port, baudrate, duration):try:#初始化串口ser =serial.Serial(port, baudrate)print(f"Opened serial port {port} at {baudrate} baud.")#记录开始时间start_time =time.time()#持
2,创建串口,实例化对象 public SerialPort myComPort = new SerialPort("COM4", 9600, Parity.None); 1. 3,创建窗口接收函数 private void ReceiveData(object sender, SerialDataReceivedEventArgs e) { int n = myComPort.BytesToRead; byte[] buf = new byte[n]; myComPort.Read(buf, 0, n); text...
串口(Serial Port):计算机上用于串行通信的接口,常见的有RS-232、USB转串口等。 波特率(Baud Rate):数据传输速率,表示每秒传输的符号数。 数据位(Data Bits):每个字节中的有效数据位数,通常是7或8位。 停止位(Stop Bits):用于标记一个字节传输结束的位数,通常是1位或2位。
read_serial: 这是线程执行的主要方法,通过self.running变量控制循环。使用self.serial_port.in_waiting检查是否有数据,如果有,就读取并打印。 stop_reading: 停止读取数据并关闭串口,确保线程安全。 步骤3:在主线程中保持循环 我们将在主线程中启动串口读取线程,并保持主线程的运行。以下是示例代码: if__name__==...
from pymodbus.constants import Endianfrom pymodbus.payload import BinaryPayloadDecoderfrom pymodbus.payload import BinaryPayloadBuilder# Read a holding register valueresult = client.read_holding_registers(address=100, count=1, unit=1)if result.isError():print("Error reading register!")else: decoder ...
connected = False port = 'COM4' baud = 9600 ser = serial.Serial(port, baud, timeout=0) while not connected: #serin = ser.read() connected = True while True: print("test") reading = ser.readline().decode() 问题是它阻止了其他任何东西的执行,包括 bottle py web 框架。添加 sleep()...
.read(bytes_to_read) # ser.reset_input_buffer() # reset buffer sensor_index, sensor_reading = read_sensor_package(bytes_serial) if sensor_index >= 0: if sensor_index not in sensors: sensors[sensor_index] = SMA(2) if sensor_reading > 0: sensors[sensor_index].append(sensor_reading)...
print("Error reading register!") else: decoder = BinaryPayloadDecoder.fromRegisters(result.registers, byteorder=Endian.Big) value = decoder.decode_32bit_float() print("Register value:", value) 使用“minimalmodbus”向保持寄存器(例如寄存器200)写入值,代码如下: ...
Thus, after reading the content, we will bring the prompt back by re-initializing the serial interface, passing only as argument of the init method a baud rate of 115200. uart.init(baudrate=115200) To finalize, we will print the content obtained from the serial port. print(content) The ...
配置Modbus RTU连接参数SERIAL_PORT = '/dev/ttyUSB0' # 串行接口BAUDRATE = 9600 # 波特率TIMEOUT = 1 # 超时时间UNIT = 0x01 # 从站地址# 创建ModbusRTU主站客户端client = ModbusClient(method='rtu', port=SERIAL_PORT, baudrate=BAUDRATE, timeout=TIMEOUT, parity='N')# 连接从站clie...