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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@fanoush
There are plenty of such Feather boards
https://www.adafruit.com/search?q=ble+feather&c=1010
so it is not clear which one it is, the Arudino code includes
Adafruit_BluefruitLE_UART.hand some of those boards have nrf51 module connected over serial to main CPU. Maybe it is this one ? https://www.adafruit.com/product/2995There are even modules just with the nrf51 to be connected over UART or SPI https://www.adafruit.com/search?q=ble+friend (there is also
#include "Adafruit_BluefruitLE_SPI.h"Also I see in the Arduino code that the
FACTORYRESET_ENABLEis enabled so maybe the device name gets reset on every power on and maybe that's why it is not available in the scan?