// Define a simple GATT service with only 1 characteristic
LBLEService ledService("19B10010-E8F2-537E-4F6C-D104768A1214");
LBLECharacteristicInt switchCharacteristic("19B10011-E8F2-537E-4F6C-D104768A1214", LBLE_READ | LBLE_WRITE);
// Add characteristics into ledService
ledService.addAttribute(switchCharacteristic);
// Add service to GATT server (peripheral)
LBLEPeripheral.addService(ledService);
// start the GATT server - it is now
// available to connect
LBLEPeripheral.begin();