UNO+WiFi R3 ATmega328P+ESP8266

Dual-Processor Architecture (ATmega328P + ESP8266): Integrates the classic ATmega328P 8-bit microcontroller alongside an ESP8266 Wi-Fi chip (8Mb / 32Mb flash) on a single UNO R3 footprint.

Onboard DIP Switch Configuration: Mode-selection DIP switches allow independent operation, serial cross-talk between MCU and ESP, or direct firmware flashing for either chip.

Integrated 2.4GHz Wi-Fi Connectivity: Enables seamless wireless networking (802.11b/g/n) for IoT data logging, web servers, and remote sensor monitoring without external shields.

100% Arduino IDE Compatible: Fully supported by the standard Arduino IDE software with existing ATmega328P and ESP8266 libraries and code sketches.

Standard UNO R3 Form Factor: Outfitted with standard header spacing, making it fully compatible with existing Arduino shields, modules, and sensors.

PCB Construction: Built on a multi-layer FR-4 glass epoxy printed circuit board with an onboard Wi-Fi PCB antenna and dedicated mode selection switches.

Power & Voltage Precautions: Powered via Micro-USB (5V DC) or 7V–12V DC via the barrel jack or VIN pin. Ensure proper DIP switch positioning before applying power to prevent logic state conflicts.

Handling & Driver Setup: Uses CH340G USB driver; install the driver on your computer before programming. Observe anti-static precautions when adjusting DIP switches.

Environmental Limits: Operating temperature range is -10°C to +60°C. Keep protected from static discharge, conductive metal particles, and direct liquid moisture.

2-in-1 IoT Workhorse Pitch: Market to makers as a neat, single-board solution for IoT projects that eliminates mess, wiring overhead, and compatibility issues of stacking separate Wi-Fi shields.

Flexible Mode Selection: Highlight the onboard DIP switch matrix which allows developers to run the ATmega328P and ESP8266 together or completely independently.

Recommended Cross-Sell Add-ons: Pair with Micro-USB Cables, Solderless Breadboards & Jumpers, and Environment Sensor Expansion Kits.

Smart Home Utility: Excellent choice for building wireless weather stations, smart home automation hubs, web-controlled relays, and telemetry systems.