Zigbee is a WPAN protocol based on the IEEE 802.15.4 foundation targeted for commercial and residential IoT networking that is constrained by cost, power, and space. This section details the Zigbee protocol from a hardware and software point of view. Zigbee got its name from the concept of a bee flying. As a bee flies back and forth between flowers gathering pollen, it resembles a packet flowing through a mesh network - device to device.