1. Complex Stack: Zigbee has a complex stack with many layers that can be difficult to debug and develop for. For example, the Zigbee stack includes the physical layer, MAC layer, NWK layer, APS layer, and ZDO layer. Each layer has its own set of features and protocols that need to be understood and implemented correctly.
2. Limited Resources: Zigbee is designed to run on low-cost, low-power devices, which means that developers need to be careful about how they use the available resources. For example, the limited RAM and flash memory of the device can limit the number of features that can be implemented.
3. Security: Zigbee is a wireless protocol, which means that it is vulnerable to security threats. Developers need to take measures to ensure that the data transmitted over the network is secure. For example, they need to use encryption and authentication techniques to protect the data.
4. Interoperability: Zigbee is designed to be an open standard, which means that it should be compatible with other devices. However, this can be difficult to achieve in practice due to differences in the implementation of the protocol by different vendors. For example, some vendors may use proprietary extensions that are not compatible with other devices.