Mega2560 with a ESP 8266 Shield - Errors verifying build

[Kamran]

Hi,
Serial 1 not going to work for mega+esp8266 shield.

You need change it to Serial 3 .
And read this topic, maybe will help you.

Mega+esp8266+ blynk 2

Hello, I recently purchased a mega+esp8266 board. There aren’t enough topics about it on Google forums, and all instructions are for the Blynk 1 version. Looking this video : [BLYNK ON MEGA+WiFi R3 ATmega2560+ESP8266] During the installation below code on the Blynk 2 version, the problem “invalid auth” appears. //==================================================== #define BLYNK_PRINT Serial #include <ESP8266_Lib.h> #include <BlynkSimpleShieldEsp8266.h> //========================…