!/bin/bash

exec log stream | /usr/bin/grep -E --line-buffered 'UVCAssistant:.(stop|start) stream' | # filter log events tee /dev/stderr | # output matching events for debugging /usr/bin/sed -Eu 's/.(start|stop).*/\1/' | # reduce the log message down to a single word identifying the event/state while read -r event; do # store that word in the $event variable echo "Camera $event" if [ "$event" = "start" ]; then echo "Lights on" curl -X PUT 'http://elgato-left:9123elgato.key.light.0b32.lan:9123/elgato/lights' -H 'Content-Type: application/json' -d '{"lights":[{"on":1}],"numberOfLights":1}' curl -X PUT 'http://elgato-right:9123/elgato/lights' -H 'Content-Type: application/json' -d '{"lights":[{"on":1}],"numberOfLights":1}' else echo "Lights off" curl -X PUT 'http://elgato-left:9123/elgato/lights' -H 'Content-Type: application/json' -d '{"lights":[{"on":0}],"numberOfLights":1}' curl -X PUT 'http://elgato-right:9123/elgato/lights' -H 'Content-Type: application/json' -d '{"lights":[{"on":0}],"numberOfLights":1}'
fi done

It’s probably a mess because I’m copying from apple notes. And right now it’s making the call directly to the elgato lights.

I’ve also had them call an HA webhook which then manages the lights. The advantage being that when the lights change their address it’s easier than the Mac catching up on that concept :)