extern void * Sensor_Main(void * args); // main loop for sensor thread; pass a Sensor* cast to void*
extern int Sensor_Query(Sensor * s, DataPoint * buffer, int bufsiz); // fill buffer with sensor data
extern void * Sensor_Main(void * args); // main loop for sensor thread; pass a Sensor* cast to void*
extern int Sensor_Query(Sensor * s, DataPoint * buffer, int bufsiz); // fill buffer with sensor data