[REQUEST] support for binding of Zigbee Green Power devices

[moffel]

The Zigbee Green Power specification describes a mechanism to bind ZGP devices by means of a sink table and translation table in the destination ZGP sink. This can be used to send a configurable zigbee packet to a configurable destination. (ZGPD -> ZGPP -> ZGPS -> device)

The benefit would be that ZGP light switches can be used to toggle zigbee lights without a controller. Since some bulbs are ZGPP and ZGPS it should be possible to build networks of a single bulb and switch.

I'm willing to contribute a pull request, but would appreciate any advice on how to go about. As I'm new to the project and zigbee in general.

[burmistrzak]

@moffel Welcome! 😊
I'd suggest you first read up on the Zigbee Green Power specification before diving into code.
Besides the spec itself, there're a few long threads about ZGP and related issues.

Direct binding of e.g. a GP switch to a Zigbee bulb is non-trivial, because the switch in question needs to send the right command (OnOff, MoveToLevel, etc.) when pressed. However, only a few battery-less switches can be configured (via NFC), others are locked to their default commands.