AM312 + ESP8266 Motion Sensor

This is a tiny box for the AM312 PIR Motion Sensor and an ESP8266.
Be aware, that only the smallest version of the ESP8266, the ESP-01 will fit in there, as the box only measures 2 x 2 x 3.5 cm.

By default, the AM312 sensor will be constantly triggered from the ESP8266's wifi signals (cause it's so near to the wifi antenna) and the voltage drops that occur when the wifi is active. To mitigate this, solder a 10µF and a 0.1µF capacitor directly between the Vcc and ground pin of the sensor. The middle pin of the sensor has to be connected to GPIO1 of the ESP8266, as this seems to be the only pin that can be configured as a default low input pin. To mitigate the effects that the wifi signals have on the pir sensor, wrap the ESP8266 in electrical tape, then on its backside add a sheet of aluminium foil and solder it to ground and then add another layer of electrical tape. This shield against wifi signals and the two capacitors are definitively needed for the AM312 sensor to not have any