There is a FactoryReset sample sketch in the Adafruit Bluefruit LE library, which can be access in the '''File > Examples > Adafruit_BluefruitLE_nRF51''' folder ([https://learn.adafruit.com/introducing-the-adafruit-bluefruit-spi-breakout/software See the Software section of this tutorial] for instructions on installing the library):
You can also perform a factory reset by sending the AT+FACTORYRESET command to your Bluefruit LE module in your favorite terminal emulator or using the ATCommand example sketch.
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<nowiki>AT+FACTORYRESET
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OK</nowiki>
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This command will also cause the device to reset.
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== Réinitialisation d'usine via la pastille de test FCTR ==
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On the bottom of the Bluefruit LE Friend board or shields there is a test pad or pin that exposes the Factory Reset pin on the modules (marked '''FCR''' or '''F.RST'''). Setting this pad low when the device is powered up will cause a factory reset at startup.