Nano Every won't power via USB PSU?

[savel]

I got a 3A 5V PSU wall wart that ends in a micro USB, with the idea that I'd use it to power the Nano Every. The nano sometimes blinks briefly right as it's plugged in, but then will not power up. (It powers up fine when connected via USB to the computer.)

If I tap into the PSU's two wires and feed directly to GND and 5V, the arduino powers up fine.

So I'm getting the impression that there is something in the USB plug that is signaling to the arduino that it is not appropriate to draw power? Or maybe the arduino requires a USB power protocol negotiation or something?

Or maybe my PSU connector is junk? I note that a raspberry pi also will not power on from it.

Thanks for any tips!

[cattledog]

@savel

Or maybe my PSU connector is junk?

That's my vote given what you have described.

[savel]

I wonder if this is an OTG thing? Like maybe the cable's USB plug has grounded the sense pin, or however that works, so the arduino/pi are being told they are the host and thus won't draw power? Just shooting in the dark... This is the PSU I'm using... Of course they state Pi compatibility explicitly so maybe I really do just have one with a bad plug...