Why does the wattmeter show low current consumption from the Odroid-C1 single board?

Question

Electronics

Hello.
There is such a wattmeter https://aliexpress.ru/item/32914620785.html
There is an Odroic c1 single-board - https://www.hardkernel.com/shop/odroid-c1/
The single- board power supply is 5V 2A.
I connected the single-board via adapters with usb output, which give out 5V 1.5A and 5V 2A, in order to eliminate the problem of the adapter.

A single-payer works with a 70-90% load all the time. Connected to the router and constantly downloads 4 streams of 200-1000 kbps. (2 video cameras, 2 streams each). There are no usb connections. There is no monitor.

On both adapters, the wattmeter shows a consumption of 0.031A, 3.7W The
question arose, why 31 milliamps? Why so little? Or is the meter showing the wrong value?

Answer 1

0.031A is the current consumed by the power supply from the 220V network.
If you are interested in the current consumed by the odroid from the power supply, then we think so. 3.7 W divided by 5V we get 0.74A - a completely normal figure. More precisely, it will be a little less, since 3.7 needs to be reduced taking into account the efficiency of the power supply. Well, plus or minus the error of the Chinese meter.