Just getting started after getting the accelerometer to flash a few times, I now no longer get the blue light. I’ve unplugged it from the USB and tried the MODE/RST procedure multiple times but the blue light never comes on. How can I fix this issue?
No Longer Able to Flash
- Edited
NautDev Just getting started after getting the accelerometer to flash a few times,
NautDev I’m not sure what you mean. The accelerometer is not flash-able. Are you using an external programmer to flash the accelerometer example code?
Make sure that you don’t have any open console connections to the nRF9160 Feather. That’s a common issue when starting up. (if you’re trying to program via the bootloader instead of external programmer)
All I’m trying to do is upload code to the board. I have a green light but no longer get a blue light. I used to and I was able to upload code to the board, but no longer. I’ve followed this (https://docs.jaredwolff.com/nrf9160-programming-and-debugging.html?highlight=bootloader#using-newtmgr) and it worked but no longer works.
No other devices have the port open. (No console connection nor LTE Link Monitor)
$ newtmgr -c serial image upload build/zephyr/app_update.bin
0 B / 73.27 KiB [—————————————————————————————————————————————————–] 0.00%Error: NMP timeout
User@DESKTOP MINGW64 ~/ncs/nfed/nrf9160-feather/samples/accelerometer (main)
$ newtmgr -c serial reset
Error: NMP timeout
NautDev did you or do you currently have the board connected/soldered to anything else? What OS are you running?
Windows 10. Bare board out of the box, nothing soldered.
NautDev Do you have a DMM handy? Can you measure 3v3 to GND? (when it’s plugged in)
Also, can you check if the COM port is enumerating in the device manager when you plug it in? That should show up no matter whether or not you’re in bootloader mode.
@NautDev I also assume you’re not using an external programmer at all during this process?