unbrick a devkit?
Posted: Tue Feb 21, 2017 12:53 am
I have been uploading different samples to one of the ESP-WROOM-32 devkits we purchased a few weeks ago and up until today everything worked fine. Today, however, the devkit appears unresponsive: connecting it to the PC does not create /dev/ttyUSB0 as it always did. The red LED does light up and the ESP32 module heats up (as expected), but the PC does not recognize the device. After a while, I notice that the LED flickers somewhat, but it does not change the problem. I tried connecting a different devKit and that works as expected, so the problem is not the PC, but rather the actual devkit device.
further troubleshooting using
So is there a way to un-brick this? Or further troubleshoot this without probes or scopes?
thanks for your help!
setup: Linux aisen 4.9.8-1-ARCH #1 SMP PREEMPT Mon Feb 6 12:59:40 CET 2017 x86_64 GNU/Linux
further troubleshooting using
confirms that the second unit (the working one) generates "add" and "remove" events, but the first one (bricked?) does not. Pressing the EN an/or BOOT buttons does not change anything. lsusb does not list the device either.udevadm monitor
So is there a way to un-brick this? Or further troubleshoot this without probes or scopes?
thanks for your help!
setup: Linux aisen 4.9.8-1-ARCH #1 SMP PREEMPT Mon Feb 6 12:59:40 CET 2017 x86_64 GNU/Linux