Tip for failing 433Mhz movement sensor

[BartSr]

In my house there are several cheap chinese movement-sensors for switching on lights. Today I had to change batteries of one of them.
After I did the sensor was not recognized any longer. Using the RFXmanager I found that the sensor gave UNDEC type of protocol i.e. unknown.
I tried several other sensors/batteries. At long last I found that the queality of the battery-used caused the problem. I used knew low-cost batteries which gave failures. After I used the wellknown high quality batteries all was Oke again (protocol Lighting4).

Lessons learnt: even if measuring of a battery gives right voltage it is not a guarantee the sensor works as expected.
Hopefully I help others with my experience (which in fact took to much time .

-Bart

[Treve]

In my house there are several cheap chinese movement-sensors for switching on lights. Today I had to change batteries of one of them.
After I did the sensor was not recognized any longer. Using the RFXmanager I found that the sensor gave UNDEC type of protocol i.e. unknown.
I tried several other sensors/batteries. At long last I found that the queality of the battery-used caused the problem. I used knew low-cost batteries which gave failures. After I used the wellknown high quality batteries all was Oke again (protocol Lighting4).

Lessons learnt: even if measuring of a battery gives right voltage it is not a guarantee the sensor works as expected.
Hopefully I help others with my experience (which in fact took to much time .

-Bart

I’m using Lidl batteries for my 433MHz Pir and Window sensors for several years now without any problems.

[manjh]

I have used cheap Chinese PIR sensors for several years now, and have experienced that changing batteries sometimes brings in a different signal.
What I do, is add this signal as new sensor. For each individual device, I now have at least two different signals, sometimes three.
The LUA script reacting to the signal looks at all signal flavors.

It may not be ideal, but it works...