LEDs status indication

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The two LEDs located on the top-right side of the dongle are used to indicate the status of the BSEC algorithm and IAQ accuracy state:

LED State BSEC Status
blue Blinks 1x per second IAQ Accuracy = 0
blue Steady ON IAQ Accuracy = 1-3 (IAQ value is valid)
red Short blink BME680 data read (report sent)
red Steady ON ERROR! Problem talking to the sensor

Accuracy lock

The BSEC algorithm usually takes about 5 minutes to provide a valid IAQ value (Accuracy = 1) after start.