I need to throw out all of my power only usb cables.
Noting quite like wasting time trying to get something to work when the issue is using a power only micro-usb cable 
@M0YNG oof! that had to be annoying! glad you figured it out!
@M0YNG same. I have been throwing mine in the garbage. Drove me nuts.
@M0YNG glad to know I’m not alone! Fought the same battle trying to program my adafruit feather for my radio-rocket project.
@M0YNG I ran into the power-only thing this week trying to get my Airspy R2 online. Major pain.
@M0YNG Mark them and save them for when you need s safe charging condom cable in the field !