Start scanning for Bluetooth® Low Energy devices that are advertising.
BLE.scan()
BLE.scan(withDuplicates)
// begin initialization
if (!BLE.begin()) {
Serial.println("starting Bluetooth® Low Energy module failed!");
while (1);
}
Serial.println("BLE Central scan");
// start scanning for peripheral
BLE.scan();
BLEDevice peripheral = BLE.available();
if (peripheral) {
// ...
}