You could use the http logic card as condition.
You can define the thhp type (post), IP:Port and the http body.
It http post right? Is application/text right?
You can define a http code for the condition.
So if http returncode= 200 (ok), your flow will continue with THEN part.
Actually, I don’t know if need to do a GET or POST to interface bticino F453AV. I’m using a small utility to send command in ASCII.
So when sending : 11*21## the lamp switch on and I should get a ACK *#*1##
I can do this with the “The Little Logger” utility but I’m not sure what method to use with Homey