Advice on Zigbee range extending

[Hedda]

FYI, the tip is that I compiled a dedicated best practice guide for Zigbee interference avoidance and network range/coverage optimization here → https://community.home-assistant.io/t/guide-for-zigbee-interference-avoidance-and-network-range-coverage-optimization/515752

Zigbee networks: how to guide for avoiding interference and optimize for getting better range + coverage

Who is this guide for? I have tried to make this guide to be a comprehensive collection of the most basic yet essential tips with a set of actions and best practice steps that should be applicable to all types of Zigbee setups, regardless of what type of Zigbee adapter/gateway/hub/bridge/devices that you are using, however, it has been written with a point-of-view in mind of Zigbee solutions that use a Zigbee Coordinator adapter locally via USB dongle/stick or remotely using a serial server ove…