Wemos D1 Mini and WS2812B RGB Shield - RTurala/Sonoff-Tasmota GitHub Wiki
WS2812B RGB Shield (single pin)
From the Wemos ws2812b shield specs the DATA pin is connected to D2 of the Wemos.
Tasmota Configuration
In the Configuration -> Configure Module page, select the following:
- D2 GPIO4 : 07 WS2812
Tasmota Main
After reboot of the device the dark-bright slider and toggle button are displayed to control the led.