Features
 Support Arduino IDE program
 Support BLE 4.1 central and peripheral switch
 Support Bluetooth serial port data transmit
 Support Bluetooth peer to peer (P2P) wireless programming
 Support Bluetooth 4.1 multiple device cascade (maximum:4)
 Support Arduino Bluetooth library (support multiple Bluetooth connection)
 Support low power consumption Bluetooth (standby current: 25uA; enabled interrupt current: 70uA)
 Double interruption to wake up:
BLE4.1 awake Atmage328P by D2 (high level awake)
Atmage328P awake BLE4.1 by D3 (low level awake)
 Support KISS connection(approach connection)
 Support Bluetooth firmware update
 Support USB charge
 Support lithium battery power supply
 Equipped with status LEDs