pyserial

问题 I am facing a peculiar issue while writing characters to Arduino using python serial communication on macOS 10.14. The Arduino is programmed to read a string, parse it and take PWM action to run a car. Ardiuno's serial communication channel is configured to receive the strings in the format < A, B, C, D > where ABCD are numbers which denote car direction, speed, steering direction and steering position. The problem is, when I send a string from the serial monitor or through the Python

问题 I am trying to open USB port in Python (using pySerial). I ran port listing tool, but it only shows COM ports. I'd like to open USB port instead (trying to communicate with tablet, but that's not relevant, I suppose). I know it is possible (and quite easy) on Linux, but I am on Windows 8, so there's nothing like "/dev/tty...". I'd like to show you some of my code, but I can't, because I have none yet (I need to know how to open USB port to be able to start coding, I am just testing yet).

问题 I am setting up communication to an Arduino that is in turn communicating with a couple of digital-to-analog controllers (www.opendacs.com for more details). I am doing this in a python wrapper in order to be able to better integrate it with the rest of my team's codebase. For my specific application, the serial port needs to be accessible (currently using pyserial) even if the current ipython session is closed out suddenly without shutting down the serial port. I thought I would use Dill to

问题 Good days, I'm new to python and trying to run a demo provided by Invensense.(9-axis MPU9250 connects a STM32F407G discovery board, I used code and python client in motion_driver_6.12 which downloaded from Invensense website.) the whole python part are python2.7, pysearil, pygame. I searched my issues in Stackoverflow, but the specific situations are a little different, and most of the solutions are useless for me. First, I show my issues. UART connects the PC, run Invensense's python client

问题 I am using docker bind mount to map the host /dev/serial/ folder generated by Ubuntu (which contains identifying symlinks to serial devices such as /dev/ttyUSB0 ). The full docker container run command I am using is docker run -d --restart always --privileged=true -v /dev/serial:/dev/serial DOCKER_IMAGE_NAME This works fine at first run, however if the serial device is disconnected and reconnected, the symlinks are recreated. This change does not propagate into the docker container and

问题 I am writing code (in python) to use serial communication with an Arduino, using the pySerial library, on Windows 7. However, I am having issues using the ports correctly. Here is my code: import serial #sets the connection parameters, relook at when know more ser = serial.Serial( port ='COM4', baudrate = 9600, parity = serial.PARITY_ODD, stopbits = serial.STOPBITS_TWO, bytesize = serial.EIGHTBITS ) ser = serial.Serial() ser.open() #opens port ser.isOpen() #returns true? handStateList = [0]*3

问题 I am attempting to port https://github.com/thearn/Python-Arduino-Command-API to python 3, so far i have gotten it to the point where i can import it without error, i tried to run the blink example found here and i would always get a type error. I think I have narrowed it down to this. The readline function from PySerial 2.7 for python 2.7.8 returns a string and the readline function from PySerial 2.7 for python 3.3 returns bytes. Python 2 >>> import serial >>> serial.VERSION '2.7' >>> ser=

问题 I have an NEC PX-42VM5HA plasma tv that I am trying to control with the connected computer. I have the data sheet that shows all the codes to control the tv and the protocol information. I am unsure how to build the right data structure in python to send the HEX control codes. Below is the Power Control Codes and the Communications Protocol. Communication Protocol: Interface: RS-232C Communication: Asynchronous Baud Rate: 9600 Data Length: 8bits Parity: Odd Stop Bit: 1bit Communication Code:

问题 I'm using an arduino uno with the basic "DigitalReadSerial" setup as outlined here: http://arduino.cc/en/Tutorial/DigitalReadSerial If i use the serial monitor included with the arduino IDE, it immediately displays any changes from pressing the button. This is what i want in pyserial, either a 0 or a 1 depending on whether the button is pressed. (to eventually trigger a timer) just to test it, i threw this together, not the prettiest, but it seems to read out the pushbutton state, but there

问题 I use python with Pyserial to use the serial port, the code like this: import serial portName = 'COM5' ser = serial.Serial(port=portName) # Use the serial port... But, the problem is, if the port is already open (by another application for example), I get an error when I try to open it like: "SerialException: could not open port 'COM5': WindowsError(5, 'Access is denied.')" . And I would like to know if I can open the port before trying to open it to avoid this error. I would like to use a