There is no components on this PCB other than the connector - so nothing to send a code. It's just a switch.// Per.
Examined more closely, it appears to the a sandwich board. Two placed face-to-face with epoxy in between. The OP needs to separate them, clean the epoxy and then take pictures.Paul
Good catch. I didn't spot that right away, but yes, you are correct. Sneaky!// Per.