PIR sensor unreliable

[Sweebee]

I have a simple pir sensor with battery sensor. It just worked fine for about 1 month till today. The gateway does not always receive the message. some times it receives the ON signal and some times not, sometimes it receives only the battery and the status of the pir is not received.

I already tried to replace the batteries but it made no difference. What could this be?

[Sweebee]

I just found out that my gateway is not working great. I made a new one but i don't know why the other is not working good?

Solved it, it was not the gateway, it was a repeater node that couldn't pass the messages all the time.