How do I call a c++ program that use sudo

[hanninen (Magnus Hannninen)]

Hi

I’m trying to control some 433mHz switches (Mercury 350.115).

After alot of trial and error I have manage to create a c++ program that I can control the switches through shh.

$ sudo /home/hass/./myMercurySwitch 2 on

This works fine.

Now I want to use this in home assistant.
In my configuration.yaml I have this:

switch:
  platform: command_line
  switches:
    window_light:
      command_on: '/home/hass/./myMercurySwitch 2 on'
      command_off: '/home/hass/./myMercurySwitch 2 off'

This gives me “Command failed” in the home assistants log.

I think it has to do with that HA don’t allow me to use sudo, or that user hass are not allowed to execute the file myMercurySwitch. Trying to execute the file as hass gives me the error “can’t open /dev/mem”.

What permissions do I need to change to get this to work?
Or is command_line not the way to do it?

[PhyberApex]

Hey,

1. make sure you can run sudo without password (see here: http://askubuntu.com/questions/334318/sudoers-file-enable-nopasswd-for-user-all-commands)

2. add HA to sudo group.

Should be good to go.

~Cheers

[rpitera (Robert Pitera)]

You can add the HA user to sudoers following the instructions in this thread:

Automation to play a sound when door sensor is triggered

Add your user hass to the sudoers list. Edit the sudoers file sudo nano /etc/sudoers and add the following at the bottom: hass ALL=(ALL) NOPASSWD: ALL then in your shell_command add sudo in front of the player: shell_command: play_sound: sudo omxplayer /usr/share/scratch/Media/Sounds/Instruments/Trumpet2.wav Also, sometimes certain accounts don’t have access to all the path environment variables, so probably best to make sure by adding the full path to omxplayer: shell_command: p…

Note that the HA user name may be hass or homeassistant depending on your installation method.

[hanninen (Magnus Hannninen)]

Thanks

I added both ‘hass’ and ‘homeassistant’ to sudoers

$ sudo visudo

hass ALL=(ALL) NOPASSWD: ALL
homeassistant ALL=(ALL) NOPASSWD: ALL

Then I added 'sudo ’ to the configuration.yalm.

switch:
platform: command_line
switches:
window_light:
command_on: ‘sudo /home/hass/./myMercurySwitch 2 on’
command_off: ‘sudo /home/hass/./myMercurySwitch 2 off’

This works now.

Many thanks