Alright, let’s get some detail and answers up in here!
The actual problem I was fixing was an intermittent ground. It was working perfectly fine at the start of the day, then I unscrewed the load output on my battery charger that powers it to add in another pair of wires for a floodlight install (well below rated load, no voltage drop or anything weird)
The annoyance came with the cheap Chinese screw terminals to connect the wires into, they didn’t apply enough clamping force and I didn’t notice at first. Light worked fine (decent size capacitor so I didn’t notice any flicker) and thought I’d retest the garage before closing it. I heard a few random relay clicks from my output relay which was strange, and it didn’t respond to my implant.
I’m not sure if this was the point where I became the master or if it just couldn’t read with unreliable power.
I removed the wires from the power supply, crimped connectors to them, and securely got a small bit of wire into the screws (have I mentioned I hate screw terminals?) - power issues resolved, door lock still didn’t work for me, but worked for my Dad… after I had just tried… we thought maybe it had ‘unlearned’ me through some freak glitch, then I remembered seeing once that someone else had this issue at one point. I grabbed the ‘master’ and tried to program my implant in the usual way and it didn’t work. I then tried the other way around, and the master started operating the relay. I later confirmed this with a spare fob, I was definitely the master at this point.
Probably Yes, but not intentionally
When it happened, no, I grabbed it after I realised what had happened to verify. It is now programmed as a user key. I had heard of one other case on the internet of this happening (can’t find the link now) so I had a good suspicion about what had happened.
Yep, at times, I was tracking down a relay clicking, so was presenting the tag for a few seconds at a time, this is when we narrowed down the ground issue, so it was probably power cycling at this time. Not really sure how long I’m afraid, wouldn’t have been more than 15 seconds at a time I don’t think.
No, I had an intermittent open circuit for a while, but no shorts.
I got some answers! Thanks for taking the time to ask, it all helps in putting the events together into something that hopefully makes sense.