Datasheet

Factory Reset
There are several methods that you can use to perform a factory reset on your Bluefruit LE module if something gets misconfigured, or to delete
persistent changes like UriBeacon or advertising payload changes, etc.
These methods are the same for both UART and SPI versions of Bluefruit LE
Factory Reset via DFU Pin
If you hold the DFU pin low (set the pin to GND) for >5 seconds, the red and blue LEDs next to the module will start blinking and the device will
perform a factory reset as soon as you release the DFU pin (disconnecting it from GND).
If you have a DFU button instead of a pin, just hold the button down.
FactoryReset Sample Sketch
There is a FactoryReset sample sketch in the Adafruit Bluefruit LE library, which can be access in the File > Examples >
Adafruit_BluefruitLE_nRF51 folder (See the Software section of this tutorial (http://adafru.it/iCj) for instructions on installing the library):
© Adafruit Industries
https://learn.adafruit.com/introducing-the-adafruit-bluefruit-le-uart-
friend
Page 18 of 115