Can't reset NRF52832 breakout board into bootloader

Development Boards Other Microcontrollers
1

I bought the NRF52832 breakout board and FTDI basic breakout. At the first time I used it, I was able to upload the LED blink code to the board. But then I could never reset it into bootloader mode. I found that some people have same problem as me, and I tried all the methods mentioned in the comments of the product and also in the forum, but none of them work. The board just keeps running the LED blinking code. Could anyone give some help? :roll:

2

Is there any tricks on this or can anyone from technical support department give some help?

3

I tried all the methods mentioned in the comments of the product and also in the forum

Just to verify, you used the methods in the Hookup Guide too, right? https://learn.sparkfun.com/tutorials/nr … bootloader

4

Yes, I first tried that, then I also tried the methods I found in the comment.

  1. One suggestion is holding down “06” button and plugging it into the FTDI so you do not have to simultaneously press down on both buttons.

  2. How to get NRF into bootloader mode: Press 06 button then reset button and hold both down for at least 5 seconds. Release the reset button while still holding the 06 button and wait until both LEDs flash (this may take up to about 15 seconds). The red LED should turn back on and the blue LED should start blinking. The board should now be in bootloader mode.

5

Did the LEDs flash? Did the LEDs operate as described?

6

When I connected the board to computer for the 1st time, the blue LED blinked at increasing speed (“timebomb” sequence), which means it was in bootloader mode according to the hookup guide. Then I uploaded the LED blinking code following the guide and it worked. The blue LED started to blink regularly. But after that I could not reset the board into bootloader. When I press down both RESET and 06 button, the blue LED would turn off. Then when I release the RESET button while holding down 06 button, the blue LED would turn on and keep on (not blinking), even after I hold down 06 button for 20 or 30 seconds. Then after I release 06 button the blue LED would turn back to blink regularly.

I also tried to disconnect/connect the FTDI Basic and that also doesn’t work…

7

Did you first press both buttons at the same time or did you push RESET then 06? Getting timing correct can be finicky