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DFU button does not work
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DFU button does not work

by dydbyte on Fri Oct 23, 2020 3:48 pm

Hello,

My nRF51822 Bluefruit LE Friend Sniffer V2 has a blue conn light flashing.
My iOS adafruit app does not see the dondle.
I press the DFU button as I enter the dongle into USB - does not change a thing
Do I have a faulty unit?

I previously tried a 2267 and it worked out of the box.

Tks,
dydbyte

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Re: DFU button does not work

by diarra on Fri Oct 30, 2020 3:00 pm

My DFU button also doesn't work. On the V3.

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Re: DFU button does not work

by mikeysklar on Sat Oct 31, 2020 9:50 pm

Does manually jumping the DFU pin to GND work to get you into DFU mode?

The first step is to force your board into a special bootloader mode, which will prevent any faulty user sketches or corrupted config data from causing problems.
Connect the DFU pin to GND with a jumper cable, or if your board has a DFU button hold the button down when adding power to your board (connecting the USB cable, etc.)
Once the device is powered, you should see a faster DFU MODE blinky pattern that lets you know you are in bootloader mode.
Now remove the jumper cable between DFU and GND (to prevent going into DFU mode when you reset)


https://learn.adafruit.com/introducing- ... e-recovery

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Please be positive and constructive with your questions and comments.