The number of nodes required per Zigbee network depends upon the size of the house, the extent of automation, and various other factors. Theoretically, a Zigbee network can have around 65 thousand nodes. However, typical Zigbee networks contain 5 to 15 nodes. Generally, a higher number of nodes is required in industrial applications. We have case studies on the internet about using up to 400 Zigbee devices within one network.