I'm struggling to connect a K8200 printer to a rpi3 running repetier-server 0.86.2 armhf.

Everything works fine on a PC with the 0.86.2 windows version, but on the Rpi i'm stuck on the second step of the printer setup :

I define my firmware, Marlin, my baudRate at 250000, then I tried every port that seems involved (/dev/serial/by-id/usb-FTDI_FT231X_USB_UART_DA00DDXD-if00-port0, /dev/serial/by-path/platform-3f980000.usb-usb-0:1.2:1.0-port0, /dev/tty/USB0, /dev/tty/AMA0, ) but whatever I may try, I'm stuck on "En attente de connexion", that forbids me to go to step 3, as to see my printer connected.

I tried to use the reset button on the printer board, as unplugging-plugging the USB, with no more luck. /var/lib/Repetier-Server/logs/server.log don't shown any error.

Note : CartesianVirtual port still works fine...

What else can I do ? Is there other relevant logs anywhere ?

I'm unsure if this question should have been adressed to rpi, 3d printing or linux community, I'm sorry if I offend anyone :)

  • $\begingroup$ Have you tried OctoPrint? Set-up is easy using the OctoPi distribution. $\endgroup$
    – Mick
    Nov 10, 2017 at 17:01
  • $\begingroup$ Thank you for the suggestion, but I already use a custom-image. Anyway, I found a fix for repetier-server, glory allelouia ! $\endgroup$ Nov 10, 2017 at 21:30

1 Answer 1


Thanks to the repetier team on git hub, we found that the problem came from a permission issue on /dev/ttyUSB0, as the user repetierserver couldn't access it.

Other people reported that these commands solves the problem:
sudo adduser repetierserver dialout
sudo adduser repetierserver tty
but in my case it seems I need to run : sudo chmod 777 /dev/ttyUSB0 in order to solve this.

  • 1
    $\begingroup$ Good to see you solved the problem and took the time to share it with us! Please accept your answer so that it does not pop up to the top of the cue once in a while. This also will help us reducing the unanswered question list. $\endgroup$
    – 0scar
    Jun 9, 2018 at 7:06

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