@hesspoint Update: There is actually a custom HA integration that is awesome: https://github.com/sindrebroch/ha-magicmirror

So I switched form the REST API to that integration and it is even better

@sranj ok, so u receive the trigger in the node_helper, and need to launch/exec/spawn your python pgm

so you need the child_process library
https://nodejs.org/en/knowledge/child-processes/how-to-spawn-a-child-process/

PIR uses the same library to launch the tvservice command, or vgencmd to blank the screen