[SOLVED] Unable to connect to serial port /dev/ttyUSB0

Setup, Configuration and Use Beginners
1

Hello,

i try to connect from my rpi3 via UART to my ebus adapter.

openhab log file show me

Unable to connect to serial port /dev/ttyUSB0

But with the command

ebusctl info

, everything works file, so it should be a openhab problem.

How can i solve the problem?

2

Have you added the openhab user to the dialout and tty group?

3

pi@raspberrypi : /etc/openhab2/services $ ls -l /dev/ttyUSB*

crw-rw---- 1 root dialout 188, 0 Okt 14 17:59 /dev/ttyUSB0

how can i add openhab user to the dialout and tty group?

4

Try sudo adduser openhab dialout and change user name to what you need if not openhab. Then do the same for tty.

5

Thank you.

after i use this commands

sudo adduser openhab dialout
sudo adduser openhab tty

everything works fine

6

Glad to help and please mark the post as solved.