SERVICE_UUID            "6E400001-B5A3-F393-E0A9-E50E24DCCA9E" 
CHARACTERISTIC_UUID_RX  "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
CHARACTERISTIC_UUID_TX	"6E400003-B5A3-F393-E0A9-E50E24DCCA9E"