Confirmed working with

Green Power

Green Power is a feature of Zigbee that allows for energy-harvesting technology to be used directly with the Zigbee stack. Green Power devices do not send standard Zigbee messages. To use a Green Power device in your Zigbee network you need a "translator". Currently only a Philips Hue device can serve as a translator.
Your Zigbee Green Power device has to always be in range of a Philips Hue device to function.

Some Legrand devices work only on Zigbee channel 11. With certain devices you need the Legrand Hub to update the firmware to have all features available.

Pairing Instructions

You must have access to the reset button on the device

Make sure that the gateway is not in pairing mode

Press 8s (approximately) on the reset button of the device (until it turns red) to ensure its disconnected from the network

Now switch your gateway to pairing Mode

Press the reset button 8s (approximately) to start the pairing procedure

Make successive clicks on the reset button (every second), until the LED turns green

Detailed pairing instructions and additional information on pipiche38 wiki.