The Zigbee 4.0 mesh networking spec for smart devices adds Sub-GHz support with the new “Suzi” feature and added range, batch setup, and improved security.

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Zigbee 4.0 introduces significant improvements including Suzi support for Sub-GHz frequency bands (800/900 MHz) that extend range beyond typical 2.4GHz limitations. Key features include Zigbee Direct for smartphone-based device setup via Bluetooth Low Energy without requiring a hub, Batch Commissioning for simultaneous multi-device installation, enhanced security, and better battery life. The update maintains backward compatibility with Zigbee 3.0 while positioning the protocol to compete with Matter over Thread in both residential and commercial IoT deployments.

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