CH_PD and VCC pin in Wemos D1 ESP 8266


I'm trying to make a simple remote led light using RemoteXY.

i am currently using Wemos D1 Mini Esp 8266, Arduino UNO and Led/

May i ask the connections of Wemos D1 Mini to Arduino UNO in order to see the RemoteXY?

i'm having a hard time connecting to RemoteXY in my smartphone.

What is a RemoteXY ?

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