# uncomment to force a HDMI mode rather than DVI. # uncomment to force a specific HDMI mode (this will force VGA)

# uncomment if hdmi display is not detected and composite is being output By default it will be display's size minus # goes off screen, and negative if there is too much border # uncomment the following to adjust overscan. # and your display can output without overscan # uncomment this if your display has a black border of unused pixels visible # uncomment if you get no picture on HDMI for a default 'safe' mode # Some settings may impact device functionality. Here's my config.txt that worked: # For more options and information see it continues like that until it times out for all baudrate combinations.Ĭould not configure port (5 'input/output error')Įrror while connecting to serial port: /dev/ttyS0 error: '(22, 'Invalid argument')' Unexpected error while connecting to serial port /dev/ttyS0, baudrate from hook default: SerialException: 'Could not configure port: (5, 'Input/output error')' comm.py:_open_serial:3699Īnd when I try to connect to ttyAMA0, this is what happens:Ĭonnecting to port /dev/ttyAMA0, baudrate Ĭonnected to: Serial(port='/dev/ttyAMA0', baudrate=, bytesize=8, parity='N', stopbits=1, timeout=2.0, xonxoff=False, rtscts=False, dsrdtr=False), starting monitor When I try to connect to ttyS0, I get the following error: After all the setup, this is the only issue preventing my new Pi from fully running OctoPrint. I replaced it after the power and USB ports broke off due to mishandling of my printer by another party. Note: prior to this, I had a Raspberry Pi 3B connected to my printer with no webcam, and didn't run into any serial connection issues. OctoPrint 1.6.1 (Webcam connected), OctoPi 0.18.0, Raspberry Pi 4B (connected to Buck Converter for power), Prusa i3 Mk3S+, Google Chrome. SystemInfo (77.7 KB) Additional information about your setup Did running in safe mode solve the problem? Yes, I tried running OctoPrint on my Pi 4B in safe mode. disabling and re-enabling the hardware serial interface in raspi-config.manually adding /dev/ttyAMA0 to available serial ports and attempting to connect to it.manually attempting to connect to /dev/ttyS0.editing ~/boot/config.txt with the following:.OctoPrint boots up just fine, and so does the printer - however, the pi has been unable to initiate a serial connection no matter what I do. I have a Raspberry Pi 4 (4GB) with Octoprint 1.6.1 installed.

How to use serial port in raspberry pi