[SOLVED] Arduino (Server) to Arduino (Client) Communication

Hello. I need help with my project. I’m trying to make the arduino communicate.

The operation:
When the widget button is pressed, first arduino(server) receive the input (and make servo move) then send the input to the second arduino(client) to move servo as well.

Here i’m using 2 arduino uno, 2 esp8266 wifi shield. I already try the example of wifi shield; wifiserver, but there’s error.
Its said > conflicting declaration ‘ESP8266 wifi’.
If I disable the function, I cannot connect with Blynk. So what should I do? Should I use the Blynk server instead?

If anyone can help me, much appreciated. Thank you in advance