Arduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board
Arduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board
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The Arduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board is a arduino + microcontroller component used by makers, students and engineers for electronics and embedded-systems projects.
Specifications
| Board Type | Arduino UNO + WiFi Combo Development Board |
| MCU 1 | ATmega328P (Arduino UNO R3 Compatible) |
| MCU 2 | ESP8266 (NodeMCU WiFi Module) |
| USB-to-Serial Chip | CH340G |
| Operating Voltage | 5V (ATmega328P) / 3.3V (ESP8266) |
| Input Voltage | 7-12V DC (via barrel jack) / 5V USB |
| Digital I/O Pins (ATmega328P) | 14 (6 PWM capable) |
| Analog Input Pins | 6 (A0-A5) |
| ESP8266 GPIO Pins | Available via onboard headers |
| Flash Memory (ATmega328P) | 32 KB (0.5 KB used by bootloader) |
| Flash Memory (ESP8266) | 4 MB |
| SRAM (ATmega328P) | 2 KB |
| Clock Speed (ATmega328P) | 16 MHz |
| Clock Speed (ESP8266) | 80 MHz / 160 MHz |
| WiFi Standard | 802.11 b/g/n (2.4 GHz) |
| WiFi Security | WPA/WPA2 |
| Mode Selection | 8-position DIP switch for serial routing and mode control |
| Operating Modes | Arduino standalone, ESP8266 standalone, Arduino+ESP8266 cooperative |
| USB Connector | Micro-USB / USB Type-B (varies by version) |
| Board Dimensions | ~68.6 x 53.4 mm (UNO R3 form factor) |
| Compatibility | Arduino IDE, ESP8266 Arduino Core, Lua (NodeMCU firmware) |
| Origin | High-Quality Compatible Board |
- Board Type: Arduino UNO + WiFi Combo Development Board
- MCU 1: ATmega328P (Arduino UNO R3 Compatible)
- MCU 2: ESP8266 (NodeMCU WiFi Module)
- USB-to-Serial Chip: CH340G
- Operating Voltage: 5V (ATmega328P) / 3.3V (ESP8266)
- Input Voltage: 7-12V DC (via barrel jack) / 5V USB
- Digital I/O Pins (ATmega328P): 14 (6 PWM capable)
- Analog Input Pins: 6 (A0-A5)
- ESP8266 GPIO Pins: Available via onboard headers
- Flash Memory (ATmega328P): 32 KB (0.5 KB used by bootloader)
Why Choose Arduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board?
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Trusted by Makers - Used by students, hobbyists and professionals nationwide.
Key Features of Arduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board
- 2-in-1 Integrated Design: ATmega328P and ESP8266 on a single board - no external WiFi shields, jumper wires, or breadboard connections needed.
- DIP Switch Mode Control: Onboard 8-position DIP switches let you instantly switch between Arduino-only mode, ESP8266-only mode, and combined cooperative mode without rewiring.
- Full Arduino UNO R3 Compatibility: Standard UNO R3 pinout and form factor supports existing shields, libraries, and thousands of Arduino sketches out of the box.
- Built-in WiFi (802.11 b/g/n): ESP8266 provides reliable 2.4 GHz wireless connectivity with TCP/IP stack for IoT, cloud communication, and web server applications.
- CH340G USB-to-Serial: Reliable USB interface for programming both the ATmega328P and ESP8266 directly from the Arduino IDE via a single USB cable.
- Dual Processor Communication: ATmega328P and ESP8266 can communicate via serial (UART), enabling the Arduino to handle sensors/actuators while ESP8266 manages WiFi and cloud connectivity.
- Flexible Power Options: Power via USB, DC barrel jack (7-12V), or Vin pin - onboard voltage regulators provide stable 5V and 3.3V rails for both processors.
- Arduino IDE Support: Program both microcontrollers using the familiar Arduino IDE with ESP8266 board package - no additional software required.
Perfect For
- Wireless audio and sensor-data links between a board and a phone
- Bluetooth-controlled robots and home-automation switches
- Wireless serial communication between microcontrollers
Arduino UNO+WiFi R3 ATmega328P+NodeMCU ESP8266 CH340G Compatible Board
The ultimate 2-in-1 development board combining the power of Arduino UNO R3 (ATmega328P) and NodeMCU ESP8266 WiFi module on a single PCB. Featuring a CH340G USB-to-serial converter and onboard DIP switches for seamless mode switching, this board eliminates the need for separate shields or wiring. Ideal for IoT projects, home automation, and wireless sensor networks.
DIP Switch Configuration Guide
| Mode | DIP Switch Settings | Description |
| Arduino Standalone | SW1-SW2 ON, others OFF | USB connects to ATmega328P for programming and serial monitor. ESP8266 is idle. |
| ESP8266 Standalone | SW3-SW4 ON, others OFF | USB connects to ESP8266 |
Frequently Asked Questions
Is technical support available?
Yes, responsive support via email and WhatsApp for setup, troubleshooting, and application guidance.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Customer Support
Email: techdepotindia@gmail.com
WhatsApp: Available for setup and troubleshooting help
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