I have been using a Raspberry Pi Zero W for the last few weeks, and have it set up to connect to a hotspot automatically. Yesterday, I was using the GPIO pins to drive an L293D motor controller -- during this time some of the standard breadboard cables that I was using seemed to burn out, but most were fine. I didn't think much of it, but when I started my hotspot and went to ssh into my pi, I found that it would not connect. I had another zero that was configured similarly; it connects to my hotspot, and swapping the SD cards between the two pi's doesn't change either's ability to connect.
I followed several wifi troubleshooting guides, but most just said to make sure the wlan0 interface was up. I'm not sure if mine is -- whenever I run
sudo iw wlan0 scan (that command may not be exactly right, I couldn't remember it just off the top of my head) I get
wlan0: ERROR while getting interface flags: No such device. Checking
ifconfig shows only
usb0 (the latter is for Ethernet Over USB). I also made some minor edits to some interface config files while following other guides, but those made no difference either.
I'm thinking my built in wifi is just gone, but everything else on the board is totally fine (at least it seems to be), so I was just wondering if there was a tool I could use to verify that the wifi chip is dead before I spent much more time trying to fix it. Alternatively, if anyone knows how to fix my issue, that would be greatly appreciated as well. ;)