Can be used for detecting dusk/dawn or interior light levels. Typically used to trigger an event, like switch a light on/off or opening closing automatic blinds or switching anything on off.
The device transmits a value between 0 (very bright) and 2300 (total darkness). For purposes of interfacing we have used the following formula to produce a number between 0 and 50.
The sensor is pre-configured to transmit a temperature reading every 5 minutes. The device sleeps in between transmission in order to save battery power and is awoken every 5 minutes by an internal timer. This allows the device to be used for around 1 year on a single coin cell battery. The transmission interval can be configured between 1 minute and 999 minutes. If powered externally then the device can operate in a fully awake mode and luminescence readings can be requested from the sensor in a request/reply fashion.