I reckon you got.confused and have two tampers open and one of them was the rkp and it didn't clear because you had more than one and got confused dot com
I would say more than likely you have forgotten the codes , very common when not used for a while
Especially as your alarm operates otherwise
What do you mean trialling another monitoring station? You going with someone direct ? Who? Isn't it cheaper to have installer to do it?
Certain methods on the internet will mess up the whole panel and you will end up with no find working either
Nothing a hoody and mask won't get passed , it's the norm these days lol
But it would have been cheaper on long run to get a bells only alarm then with no monthly fees from a local install which works
What was the ADT system that was there before?
Relay would only be fire the trigger , so you need the 12v / 0v for charging and hold off ,
When you say your Chinese DIY has 5v only is that a pulsed on alarm output
What is it your trying to connect it to
I assume lack of customer service happens ,it then again your security probably isn't high priority either to be fair
What's the crack dude?