This isn’t really a sensor, but we do use the AWARE log system to record every time a sensor is turned on or off. Such records will be stored in the log_message field of the aware_log table, and they will start with ‘Sensor: status_’.
For example, ‘Sensor: status_location_gps=false’ means that the location (GPS) sensor has been deactivated and ‘Sensor: status_applications=true’ means that the Applications sensor has been activated.
