PRIMARY_SERVICE, GAP_SERVICE
CHARACTERISTIC, GAP_DEVICE_NAME, READ | WRITE | DYNAMIC
CHARACTERISTIC, GAP_PERIPHERAL_PRIVACY_FLAG, READ | WRITE | DYNAMIC
CHARACTERISTIC, GAP_PERIPHERAL_PREFERRED_CONNECTION_PARAMETERS, READ, FF FF FF 00 03 FF FF
CHARACTERISTIC, GAP_APPEARANCE, READ | WRITE | DYNAMIC
CHARACTERISTIC, GAP_RECONNECTION_ADDRESS, READ | WRITE | DYNAMIC

PRIMARY_SERVICE, GATT_SERVICE
CHARACTERISTIC, GATT_SERVICE_CHANGED, READ

PRIMARY_SERVICE, FFF0
CHARACTERISTIC, FFF1, READ | WRITE | AUTHENTICATED_SIGNED_WRITE | AUTHENTICATION_REQUIRED, "A"