Datasheet

Click the Upload button, which should now be enabled on the home screen

This will begin the DFU update process which should cause the firmware to be

updated or restored on your Bluefruit LE module

On iOS:

Create a .zip file containing the .hex file and init.dat file that you will use for the

firmware update. For example:

Rename

'blefriend32_s110_xxac_0_6_7_150917_blefriend32.hex' to application.hex

Rename 'blefriend32_s110_xxac_0_6_7_150917_blefriend32_init.dat'

to application.dat

Upload the .zip file containing the application.hex and application.dat files to your

iPhone using uTunes, as described here

Open the nRF Toolbox app (using the latest version)

Click the DFU icon

Click the Select File text label

Switch to User Files to see the .zip file you uploaded above

Select the .zip file (ex. blefriend32_065.zip)

On the main screen select Select File Type

Select application

On the main screen select SELECT DEVICE

Select DfuTarg

Click the Upload button which should now be enabled

This will begin the DFU process and your Bluefruit LE module will reset when the

update is complete

If you get the normal 2 or 3 pulse blinky pattern, the update worked!

Adafruit_nRF51822_Flasher

As a last resort, if you have access to a Raspberry Pi, a Segger J-Link or a STLink/V2, you

can also try manually reflashing the entire device, as described in the FAQ above, with

further details on the Software Resources page.

How do I reflash my Bluefruit LE module over SWD?

Reflashing Bluefruit LE modules over SWD (ex. switching to the sniffer firmware and back)

is at your own risk and can lead to a bricked device, and we can't offer any support for

this operation! You're on your own here, and there are unfortunately 1,000,000 things

that can go wrong, which is why we offer two separate Bluefruit LE Friend boards -- the

sniffer and the normal Bluefruit LE Friend board with the non-sniffer firmware, which