2.3 BitCloud Stack APIs
The stack API functions fall into the categories related to the following layers:
- Base Device Behavior (BDB)
 - Configuration Server (CS) functions
 - Hardware Abstraction Layer (HAL) (functions dealing with the hardware functionality of the MCU)
 - System environment
 - Zigbee Cluster Library (ZCL)
 - Zigbee Device Object (ZDO)
 - Zigbee Green Power (ZGP)
 - Network (NWK)
 
