Confirmed working with

Pairing Instructions

Press and hold the button on the device until the blue light starts blinking, release it and the pairing should begin.

If you're having problems pairing, try keeping the device alive (press the button every second) after pairing started, until pairing completed (source: ZHA with Zigate and Aqara device).

If you're having connection or pairing issues read Xiaomi & Aqara Devices - Pairing & Keeping them connected.

Tasmota Configuration

Download configuration file.
Download the configuration file and put it in the file-system of Tasmota. It should be loaded automatically and provide the mapping for the device.