This is what I’ve been using. It’s a mashup of the methods I posted above. I’d still like to see better solutions, though. # A function that tries to list serial ports on most common platforms def list_serial_ports(): system_name = platform.system() if system_name == “Windows”: # Scan for available ports. available = [] for i … Read more
In Python 2 – Turn it into a string first, then into unicode. str(integer).decode(“utf-8”) Best way I think. Works with any integer, plus still works if you put a string in as the input. Updated edit due to a comment: For Python 2 and 3 – This works on both but a bit messy: str(integer).encode(“utf-8”).decode(“utf-8”)
The slow CPU wasting part is the “do serial sending”. The while loop with just a short sleep will use negligible CPU. Can you show the serial sending code. There may be a way to speed that up. On this rather slow CPU I see this: import time while True: time.sleep(0.2) # 0% CPU while … Read more
Use pip to install pyserial. First install pip: sudo apt-get install python-pip After that install pyserial: sudo pip install pyserial
I see a couple of issues. First: ser.read() is only going to return 1 byte at a time. If you specify a count ser.read(5) it will read 5 bytes (less if timeout occurrs before 5 bytes arrive.) If you know that your input is always properly terminated with EOL characters, better way is to use … Read more
You can use inWaiting() to get the amount of bytes available at the input queue. Then you can use read() to read the bytes, something like that: While True: bytesToRead = ser.inWaiting() ser.read(bytesToRead) Why not to use readline() at this case from Docs: Read a line which is terminated with end-of-line (eol) character (\n by … Read more
Using a separate thread is totally unnecessary. Just follow the example below for your infinite while loop instead. I use this technique in my eRCaGuy_PyTerm serial terminal program here (search the code for inWaiting() or in_waiting). Notes: To check your python3 version, run this: python3 –version My output when I first wrote and tested this … Read more
Encode your data which you are writing to serial,in your case “serialcmd” to bytes.try the following : ser.write(serialcmd.encode())
this is something I did and worked out for me so far: import os, pty, serial master, slave = pty.openpty() s_name = os.ttyname(slave) ser = serial.Serial(s_name) # To Write to the device ser.write(‘Your text’) # To read from the device os.read(master,1000) If you create more virtual ports you will have no problems as the different … Read more
There was a talk about using Python with robotics at this years PyConAU called Ah! I see you have the machine that goes ‘BING’! by Dr. Graeme Cross. The only option he recommended for using Python on a microcontroller board was PyMite which I think also goes by the name of Python-On-A-Chip. It has been … Read more