Pi in a door/window sensor?

[Tuicemen]

These things are so small they'll fit in almost anything, even a X10 door/window sensor.

This might be the easiest one yet! It should control any X10 interface you can plug into it when your done. 

[Brian H]

Is that the DS10A?
The new model DS12A is smaller and probably would not fit your assembly.

[dave w]

Wow! Very nice fit.

[Tuicemen]

Is that the DS10A?
The new model DS12A is smaller and probably would not fit your assembly.

Yes, it is a DS10A I don't have a DS12 to play with.
I've looked a number of X10 module cases many will hold the Pi Zero W. Its only 1 cm longer then the battery case and no wider then the 2 AA battery compartment.