Zigbee network optimization: a how-to guide for avoiding radio frequency interference + adding Zigbee Router devices (repeaters/extenders) to get a stable Zigbee network mesh with best possible range and coverage by fully utilizing Zigbee mesh networking

Each individual Zigbee device in your Zigbee network mesh constantly evaluates and collects information about all its possible connections and they will always try to automatically connect to the Zigbee Router with the strongest signal power about once every 24 hours or so.

So there is no need for you to do anything to initiate the healing of a Zigbee network, but if you like to try to speed up that process then you can try making a troublesome device powerless for a while and then replugging it.

In that case, the smart thing, to begin with, is simply to add more good Zigbee Router devices in the best possible location and then just wait until the next day for your other Zigbee devices to connect to them.

Note however that as mentioned in the guide above, not all devices behave well like this or play nice with other manufacturers/brands, so it is possible that some devices will not use other manufacturers/brands as Zigbee Router devices, and in a few rare occasions some bad devices suppose to work as Zigbee Router devices but not forward messages from other brands (in which case there is nothing to do other than completly remove that bad device from your Zigbee network).

Suggest adding a few “known good” dedicated Zigbee Router devices and place in different areas.

  • Buy a few known good dedicated Zigbee Router products and place them strategically as Zigbee repeaters. Personally, I suggest buying and adding at least three such devices.
    • For example, the “IKEA Tradfri Signal Repeater ” and “Aeotec Range Extender Zi ” are products that work very well out-of-the-box, while a more powerful alternative is to make yourself some semi-DIY variant by flashing the correct Zigbee Router firmware to Zigbee Coordinator USB dongles and then using them as stand-alone Zigbee Signal Repeater devices in USB-chargers for power, like, for example, either the Sonoff ZBDongle-E (EFR32MG21 based) or the Sonoff ZBDongle-P (CC2652P) work great as dedicated stand-alone Zigbee Signal Repeaters with recommended firmware.
      • Search community forums for more “Zigbee signal repeater” or “Zigbee range extender” Zigbee Router tips.
  • Buy a few additional new Zigbee USB adapters to use after re-flashing them with Zigbee Router firmware.
    • Reflash/reuse modern Zigbee USB adapters to act as Zigbee Router devices by changing Zigbee firmware.

Jerry-rigged mine since it is hidden anyway, however, I heard docking USB extension cables work nice, (especially if Zigbee Coordinator has an external antenna like Sonoff’s ZBDongle-P or ZBDongle-E):