I use the Smart Implant as trigger to open an outside electric gate (powered by a Nice gate motor). The gate can be opened/closed via a momentary switch, so basically by momentarily shorting two pins on the gates controll module.
I've put the Smart Module in a dedicated, hermetically enclosed plastic enclosure, along with a small 12V DC power supply. The DC power supply gets powered from the same line as the gate motor, and the smart module outputs are connected to the appropriate pi