I have Ubuntu 18.04 LTS installed.
I installed Arduino IDE v1.8.5 as a snap with
snap install arduino-mhall119
I have added my user to dial-out group and rebooted:
sudo usermod -a -G dialout $USER
$ groups
username adm dialout cdrom sudo dip plugdev lpadmin sambashare
I connected my Arduino Nano to the laptop, it is detected on port /dev/ttyUSB0 (ch341-uart).
$ ls /dev/ttyUSB0 -al
crw-rw---- 1 root dialout 188, 0 авг 13 11:59 /dev/ttyUSB0
I tried to upload the simpliest Blink sketch and get the following errors in the terminal:
$ arduino-mhall119.arduino
avrdude: ser_open(): can't open device "/dev/ttyUSB0": Permission denied
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.**
Also I have installed arduino
1.8.5 with umake - it can access serial port in usual way.
Note: we already have similar question here, but the solution was to use package from umake
, not fix for the Snap.
So my question is: How to make Arduino (Snap) access serial port /dev/ttyUSB0 (or /dev/ttyACM0)?
Update: connecting serial-port to the snap fails with the following message
$ snap connect arduino-mhall119:serial-port
error: snap "core" has no "serial-port" interface slots
Current interfaces are:
$ snap interfaces | grep arduino
:home arduino-mhall119,gedit,organize-my-files,vlc
:network arduino-mhall119,gedit,organize-my-files,pulsemixer,vlc
:unity7 arduino-mhall119,gedit,organize-my-files,vlc
:x11 arduino-mhall119,organize-my-files,pulsemixer,vlc
- arduino-mhall119:serial-port
Changing permissions of serial port to 777 with sudo chmod 777 /dev/ttyUSB0
does not help.
The following do not work too (because of syntax errors):
$ sudo snap connect arduino-mhall119:arduino
error: snap "arduino-mhall119" has no plug named "arduino"
$ snap connect arduino-mhall119:/dev/ttyUSB0
error: snap "arduino-mhall119" has no plug named "/dev/ttyUSB0"
$ snap connect arduino-mhall119
error: cannot resolve connection, plug snap name is empty
Information about YAML-manifest:
$ ls -l /snap/arduino-mhall119/current/meta/snap.yaml
-rw-r--r-- 1 root root 353 июл 28 00:20 /snap/arduino-mhall119/current/meta/snap.yaml
$ cat /snap/arduino-mhall119/current/meta/snap.yaml |grep -A 12 slots
$ cat /snap/arduino-mhall119/current/meta/snap.yaml |grep -A 5 plug
plugs:
- x11
- unity7
- home
- network
- serial-port