pyserial

问题 I have a serial Python program, Linux environment (Raspbian / Raspberry Pi), that uses a serial port via USB & serial adapter. I need to handle a situation when the user unplug the USB adapter and then re-insert it. The problem is that, on reconnect, the ttyUSB0 becomes ttyUSB1 and so the port is no longer found. However, if I stop the Python program (keyboard interrupt) and again unplug and re-insert the USB adapter, then the port goes back to ttyUSB0 (and so I can start over again). This

问题 I have a serial Python program, Linux environment (Raspbian / Raspberry Pi), that uses a serial port via USB & serial adapter. I need to handle a situation when the user unplug the USB adapter and then re-insert it. The problem is that, on reconnect, the ttyUSB0 becomes ttyUSB1 and so the port is no longer found. However, if I stop the Python program (keyboard interrupt) and again unplug and re-insert the USB adapter, then the port goes back to ttyUSB0 (and so I can start over again). This

问题 I have a serial Python program, Linux environment (Raspbian / Raspberry Pi), that uses a serial port via USB & serial adapter. I need to handle a situation when the user unplug the USB adapter and then re-insert it. The problem is that, on reconnect, the ttyUSB0 becomes ttyUSB1 and so the port is no longer found. However, if I stop the Python program (keyboard interrupt) and again unplug and re-insert the USB adapter, then the port goes back to ttyUSB0 (and so I can start over again). This

问题 I've begun writing some code using PySerial to send and receive data to a serial device. Up until now I've only been working on initiating a transaction from a terminal and receiving a response from the serial device. pseudo: main: loop: message = get_message() send_to_serial(message) time_delay(1 second) read_response() Now I'd like to implement a listener on that port in the case that the serial device is the one initiating the communication. Also to remove the time_delay which could end up

问题 I've begun writing some code using PySerial to send and receive data to a serial device. Up until now I've only been working on initiating a transaction from a terminal and receiving a response from the serial device. pseudo: main: loop: message = get_message() send_to_serial(message) time_delay(1 second) read_response() Now I'd like to implement a listener on that port in the case that the serial device is the one initiating the communication. Also to remove the time_delay which could end up

问题 I am trying to read binary serial port using Python. Each source message consists of 3 floating point values, 12 bytes in total. Using the Python code shown below, I was expecting to get a 12-byte bytearray message. However, running the code I found out it is not always 12 bytes and sometimes it is gibberish. What am I doing wrong here or why is it so? Pyhon code: #!/usr/bin/env python import serial import time serialPort = 'COM3' serialBaud = 921600 dataNumBytes = 4 numData = 3 rawData =

问题 I am trying to read binary serial port using Python. Each source message consists of 3 floating point values, 12 bytes in total. Using the Python code shown below, I was expecting to get a 12-byte bytearray message. However, running the code I found out it is not always 12 bytes and sometimes it is gibberish. What am I doing wrong here or why is it so? Pyhon code: #!/usr/bin/env python import serial import time serialPort = 'COM3' serialBaud = 921600 dataNumBytes = 4 numData = 3 rawData =

问题 I seem to be having an problem, when I run this Python 3.5 script It's for USB serial controlled device: import serial import time ser1 = serial.Serial('/dev/tty.usbserial', 115200, timeout=0.1) def setupMode(): ser1.write(b'$PF,200\r\n') ser1.write(b'$PO,20\r\n') setupMode() def startMeasurments(): ser1.write(b'$GO\r\n') startMeasurments() def checkUnit(): ser1.write(b'$US\r\n') checkUnit() while True: data = ser1.read(9999) print ('Got:', data) time.sleep(0.1) ser1.close() I get these

问题 I've written a Python3 script which runs on Raspberry Pi Zero W that collects data from an IMU sensor (MPU9250) and creates 3 different angle values; roll, pitch, yaw. Which looks like this: def main(): while True: dataAcc = mpu.readAccelerometerMaster() dataGyro = mpu.readGyroscopeMaster() dataMag = mpu.readMagnetometerMaster() [ax, ay, az] = [round(dataAcc[0], 5), round(dataAcc[1], 5), round(dataAcc[2], 5)] [gx, gy, gz] = [round(dataGyro[0], 5), round(dataGyro[1], 5), round(dataGyro[2], 5)]

问题 Whenever i execute the code below it gives me following Error: ImportError: cannot import name 'Serial' from 'serial' (unknown location) Code: from serial import Serial arduinodata = Serial('com4',9600) print("Enter n to ON LED and f to OFF LED") while 1: input_data = raw_input() print ("You Entered"+input_data) if (input_data == 'n'): arduinodata.write(b'1') print("LED ON") if (input_data == 'f'): arduinodata.write(b'0') print("LED OFF") I have installed all the required python modules. Like