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.
