The Zigbee protocol is also works at 2.4 GHz and is based on the IEEE 802.15.4 protocol. It exchanges at low data rates over a restricted range of 100 m range. As a result, Zigbee is suitable for homes or small businesses. In addition, this protocol has some advantages offering low power operation and high security with scalability. Zigbee data rates reach up to 250 Kbps.