Aqara door sensor - device stopped workinng

I don’t know if this is the right place for this post.
I have an aqara door sensor installed outside in a waterproof case foe my garage door. It was working fine for a month. Today stopped working. It was always in “close/off” position.
I bring it inside my home, in order to see what is wrong. I am noticing that I can not reconnect it to phoscon app. I am pairing it with deconz . When I try to reset it, there is no blinking led light at all.
I removed the battery, I also check if the battery is working and it is. Anyone knows why this happened or how I could fix it?

Reset and re-pair it

I can’t. It is (like) dead and I don’t know why

Try with a new battery.

I tried with a new battery. Still the same.
Probably the cold and the humidity damage it.
I have to look for another solution. I have seen that some people use reed switch but I don’t know how to integrate with home assistant