Pi Plates and exec command

[dbrittain (Drew Brittain)]

I bought a DAQ and relay plate from Pi Plates and I am having issues getting the scripts to run from openhab items with an exec command. I previously just used GPIO commands in my scripts and they worked fine.

An example of one of my items is:

Switch Heating { exec=“ON: python heat_on.sh,OFF: python heat_off.sh” }

heat_on.sh script is:

import piplates.RELAYplate as RELAY
RelayON(0,1)

The script works in terminal by itself but not in openhab.

[rlkoshak (Rich Koshak)]

See:

How to solve Exec binding problems

One of the most common problems I help people with on this forum is dealing with the Exec binding. So I’m writing this post so I can reference it later. Background When openHAB is installed in the automated way (i.e. via apt-get) an openhab user is created and the service runs under that user. The openhab user has the following attributes: no shell so one cannot log in or su to this user limited rights not a member of sudoers has a home directory in /var/lib/openhab (or /var/lib/openhab2) has…

Realize that the openhab user has a limited environment with limited permissions and paths. So be sure the openhab user is a member of the right groups, has permissions to read/write/execute everything need, and use the full path to executables.