Bulb Security Camera HD 960P Network DVR WIFI IP Motion Detector E27 LED Light – this one has Linux / 2 way communication / explicitly mentions separate IR and visible LED / does not explicitly mention PIR
Cadmium Sulfide cells have simlar spectral response to the human eye – Cadmium Sulfide versus Silicon
PIR – Passive Infrared Sensor – At the core of a PIR sensor is a solid state sensor or set of sensors, made from pyroelectric materials—materials which generate energy when exposed to heat. Typically, the sensors are approximately 1/4 inch square (40 mm2), and take the form of a thin film. Materials commonly used in PIR sensors include gallium nitride (GaN), caesium nitrate (CsNO3), polyvinyl fluorides, derivatives of phenylpyridine, and cobalt phthalocyanine. Note: This is not an IR LED.
Uses Hi3518 and has firmware download available on webpage