Kunkune

Mega 2560 + WiFi R3 Arduino Compatible

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$13.33 $19.9 In stock

Category: ESP32 and ESP8266

Mega 2560 + WiFi R3 Arduino Compatible Board — ATmega2560 and ESP8266

The Mega 2560 + WiFi R3 combines the ATmega2560 and an ESP8266 ESP-12E WiFi module on a single board, providing the full 54-pin ATmega2560 feature set alongside 2.4GHz WiFi without a separate shield. A set of DIP switches on the board configures the communication path between the two chips, supporting four modes: standalone ATmega2560, standalone ESP8266, serial passthrough (ATmega programs ESP8266 via UART), and co-processor mode (both chips active, communicating over Serial3).

  • ATmega2560 — 256KB flash, 54 I/O, 16 analogue inputs, 4 UARTs
  • ESP8266 ESP-12E — 2.4GHz WiFi, 4MB flash, runs AT firmware
  • DIP switch mode selection — 4 operating modes
  • Onboard USB-to-serial (CH340G) — programs both chips from one USB port
  • Uno/Mega R3 header layout — standard shield compatibility
Specification Value
MCU ATmega2560 at 16MHz
WiFi module ESP8266 ESP-12E (2.4GHz)
Flash (ATmega) 256KB
Flash (ESP8266) 4MB
USB interface CH340G
Mode selection 8x DIP switch

Best for

WiFi-connected CNC machines, IoT sensor hubs with many I/O pins, wireless MEGA projects, ESP8266 programming with a Mega as ISP, and projects needing both ATmega2560 pin count and WiFi without buying a separate shield.

Why Kunkune

Shipped from UK stock. 60-day returns, no minimum order. Fast Royal Mail delivery.

Buying in bulk? For orders of 10+ units, contact us for trade pricing.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Scarlett Z. ★★★★★

The 54-pin layout means I can run a full CNC shield and still have pins left over for sensors, and the onboard ESP8266 handles WiFi without any extra wiring. Took me about 20 minutes to get the two chips talking to each other, but now it's rock solid for my home automation hub.

Henry C. ★★★★★

I was worried about getting the ESP8266 to talk to the ATmega2560, but the pre-soldered connections on this board work perfectly right out of the box. It's a solid foundation for my IoT project that needs all 54 I/O pins.

Harper ★★★★★

I tried uploading a custom sketch and was surprised how smooth the ESP-12E WiFi module integrated with the ATmega2560—no extra soldering needed. The 54-pin layout saved me from buying a separate shield, and it’s been rock solid for my IoT setup.

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