Wait for galaxyguy and some others I used to fit them not anymore, not because it's rubbish mind you
Have a look at selfmon aswell you can contact them to see there app options and what you can
Mr galaxy might be on holiday , we need notifications when posting names might nudge him
Geezer come you want to do all this protocol stuff ? Googling is easier
https://www.security.honeywell.com/uk/products/intruder/control-panels/galaxy-flex/462175.html
Actually I just fixed my washing machine new element and drier sensor , forgot to reconnect the drier pipe , leaked all over floor , but all sorted now