How to control DMX lights via web interface?

Hello there,

I just got my new Arduino Uno WiFi and this DMX interface: https://www.seeedstudio.com/grove-dmx512-p-1447.html
I connected everything and I am able to control the lights over the serial monitor using the DMXSimple library. My intention was to control them via a web interface from a mobile device for example, but I have absolutely no idea how and where to begin.

Maybe someone can give me a hint? :slight_smile:

I tried to adapt this tutorial but it was more difficult than expected: http://www.arduino.org/learning/tutorials/boards-tutorials/control-a-servo-motor-by-smartphone-pc

How can I address each channel? Does it have something to do with the serial monitor?