Hi,
I am using two of these modules:
https://www.sparkfun.com/products/16481
Is there a way to detect if the power supplied via USB is not sufficient?
There is no mention of this in the Hookup Guide (link below)
I think you can use this one: https://www.amazon.com/Eversame-Multime … ljaz10cnVl
I always keep on hand one of the USB current meters that tepalia02 mentioned. Very handy.
And I just happen to have hardware to get actual readings. ZED-F9P + u-blox antenna:
https://cdn.sparkfun.com/assets/learn_t … tion_1.jpg
~120mA with no SIV (acquisition). This matches the datasheet specs pretty well:
https://cdn.sparkfun.com/assets/learn_t … mption.jpg
Running two ZEDs with active antennas off a USB port shouldn’t get above 250mA and should be well under the 500mA limit of any given USB port.