Hi @oomjan, thank you for joining our community.
For the freshness of data, I’ve finished testing and replied to this post right away.
A short answer to your question, according to my test, the average power consumption of the AirGradient ONE (I-9PSL-DE) is 1.383W.
Tested with the AirGradient ONE (I-9PSL-DE) running on firmware V3.4.1.
Set the OLED display brightness & LED bar brightness to 100% (and Wi-Fi enabled to report data to my Home Assistant and AirGradient Dashboard).
I measured the power consumption with a Power-Z KM003C USB meter.
Here’s a chart with more parameters:
Green = VBUS = voltage (in V)
Pink = IBUS = current (in A)
Blue = PWR = power (in W)