I can't understand the meaning of the M/N

Discussion in 'Presence Sensor' started by jemin9312, Aug 13, 2019.

  1. jemin9312

    jemin9312 New Member

    I read the X4M300 datasheet. At 4.6 Firmware Algorithms I saw the chart but, I can't understand the exact meaning of M/N

    1) I think M/N is Movement/No movement is it right?

    2) Could you explain the exact meaning of this?

  2. Charlie Shao

    Charlie Shao Moderator Staff Member

    According to datasheet, an M/N Combiner determines that M out of N detections need to be a certain value for the output to change. The LocalState updates every 1 second. It means for the last N seconds, a Local State happens M times constantly.

    The State Machine determines the (global) State, which is No Presence when both LocalStateFast and LocalStateSlow is No Movement and Presence in all other local state combinations.