EDIT: forgot to say it work from 10 - 99 % hi , like to share my solution ( i use alsamixer to set volume) : virtual switch with slider (in my system : id=71) on action run the script set_volume.sh: pi@tana-rpi1:~/domoticz/scripts $ cat set_volume.sh v=$(curl -s "http://192.168.10.181:8888/json.htm ...