X2M200 LED Inhalation mode

Discussion in 'Respiration Sensor' started by Shane, Oct 6, 2018.

  1. Shane

    Shane New Member

    The X2M200 datasheet (Rev. F) defines the LED “Inhalation” mode (Under section 4.2 User Settings) as follows:

    LED is off except when the sensor has good track of inhale and exhale.
    Inhale: Blue
    Exhale: Yellow

    I tested this by selecting the “Respiration” option in the XeThruExplorer and then selected “Inhale” for the LED control setting. I found that the LED was quite accurate in turning blue when I inhaled and yellow when I exhaled.

    Does anyone know the algorithm/calculation that the XeThru X2M200 firmware uses to decide when to change the LED to blue/yellow? Specifically, how does it use the respiration movement and rate to do this (if that’s what it’s using)?