- service data size can be 18 bytes on nRF51822
- service data size can be 18 bytes on nRF51822

possan/arduino-BLEPeripheral,sandeepmistry/arduino-BLEPeripheral,pi19404/arduino-BLEPeripheral,femtoduino/arduino-BLEPeripheral,possan/arduino-BLEPeripheral,femtoduino/arduino-BLEPeripheral,pi19404/arduino-BLEPeripheral,sandeepmistry/arduino-BLEPeripheral,sandeepmistry/arduino-BLEPeripheral