* '''DFU Button''': pushing this button when you power the shield up will force the Bluefruit LE module to enter a special firmware update mode to update the firmware over the air.<br />Once the device is powered up, this pin can also be used to perform a factory reset. Press the button for >5s until the two LEDs start to blink, then release the pin (set it to 5V or logic high) and a factory reset will be performed. | * '''DFU Button''': pushing this button when you power the shield up will force the Bluefruit LE module to enter a special firmware update mode to update the firmware over the air.<br />Once the device is powered up, this pin can also be used to perform a factory reset. Press the button for >5s until the two LEDs start to blink, then release the pin (set it to 5V or logic high) and a factory reset will be performed. |