How to: Flash SonOff USB Dongle to be a Zigbee Repeater/Router & Set Transmit Power

Now that I have a couple of these sonoff dongles on my mesh (and allowed my zigbee mesh to rebuild), I can already tell how great these little suckers are! So happy with them.

But I do have a question for the dongle experts around these parts: I know the dongles improve the functioning of the zigbee mesh, but do they also have better reach (distance)? I use this awesome zigbee sensor in my car and would love for my zigbee mesh to see my arrival home another couple hundred feet sooner. Is this a thing?

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