The Zigbee Alliance released the official IEEE 802.15.4-2003 Zigbee specification in late 2004, which has been revised several times since then and is widely seen as a replacement for Wi-Fi and Bluetooth devices. Zigbee is well suited for low-power devices that require small-scale bandwidth. Zigbee networks support up to 65,000 nodes on a single network. As an open global standard, Zigbee also operates on unlicensed bands at 2.4 GHz, 900 MHz, and 868 MHz. The latest is the Zigbee 3.0 protocol.
Bluetooth Mesh is relatively new. The Bluetooth Special Interest Group (SIG) released the standard in 2017, providing users with the convenience of using local smartphone connections without a gateway, using a flood message relay method based on peer-to-peer. Signals are transmitted directly between nodes. Since there is no centralized node, single points of failure are eliminated. The latest is Mesh 1.1 To know more details visit: https://ebyteiot.com/