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ATmega2560 Arduino Board with Integrated ESP-8266.

The primary use case is to add Wifi to an ATmega2560 project using "AT" commands sent through Serial3.

This requires no programming of the ESP-8266 and the ATmega2560 is programmed normally via the USB.  There is a 14 pin male header providing connections to some ESP-8266 GPIO Pins.

The ESP-8266 may be programmed independently by changing the position of the slide switch so that the ESP-8266 is connected to the USB UART rather than Serial3 of the mega2560... A "MODE" button is provided to enable IDE program upload to the ESP-8266.

There are DIP switches for custom configuration of the serial communication - First time users should set Switches 3 and 4 to ON and S2 to the TxD3/RxD3 to use the board as a regular ATmega2560 with communication to the ESP via Seria3.println().

We play with our own "toys" and are more than happy to assist you with your specific configuration.

• 3.95" TFT Display for Arduino or Pi
  
  
• ST7796 Controller
• 480 x 320 resolution
• on-board video memory.
• 8/16 bit parallel interface - HX8357B
• 5V tolerant
• touch screen I/F - I2C
• mega2560 Shield

The best source for Arduino software for these graphics shields is the MCUFRIEND_kbv library which is basically a front end to the AdaFruit_GFX library with custom hooks for Arduino shields.  This library can easily be installed directly from the Arduino IDE just by searching for MCUFRIEND in the library manager.  It has some excellent examples which will become availabl from the "Examples" menu once the library is installed.  I recommend the graphictest_kbv or the testcard_kbv examples.