Read PM doesn't return a value

[oscgonfer]

Not always, but it happens that the read command does not return a value after the wait time... (could be because of the adaptative interval), but from a user perspective, looks weird (see below):

SCK > read hum
Humidity: 64.81 %
SCK > read noise
Noise dBA: 43.80 dBA
SCK > read pm
Your reading will be ready in 16 seconds try again!!
SCK > read light
Light: 0 lux
SCK > read uva
AS7331 UVA: 0.08 uW/cm2
SCK > read pm
Your reading will be ready in 5 seconds try again!!
SCK > read pm
Your reading will be ready in 14 seconds try again!!
SCK > read pm
Your reading will be ready in 11 seconds try again!!