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Arduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board
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The Uno+WiFi R3 is a fully integrated board that combines the Uno R3 ATmega328 microcontroller with the WiFi ESP8266 chip, along with 8Mb of memory, all on a single board. Inspired by the widely used arduino uno, this board brings added wireless capabilities without compromising simplicity. Both modules can operate together or separately, each with their own pinout headers.
This board provides a convenient solution for developing new projects that require both Uno and WiFi functionalities. For users exploring options like the arduino uno wifi rev3 or arduino uno rev3 wifi, this board offers a cost-effective and flexible alternative with similar hybrid functionality. It includes a USB-serial converter, CH340G, allowing for easy updating of sketches and firmware for both ATmega328 and NodeMCU ESP8266.
Essentially a modernized version of the classic Arduino UNO R3 board, the Uno+WiFi R3 offers simple operations and includes a DIP switch to connect the different modules in various configurations. LED lights are provided for connecting peripheral sensors and modules, making it a versatile choice for a wide range of projects.
Check out the entire range of Compatible Arduino Boards
A common question is “does Arduino r3 have wifi” — the standard Arduino Uno R3 does not include built-in WiFi. However, boards like the Uno+WiFi R3 solve this limitation by integrating the ESP8266 WiFi module directly onto the board, eliminating the need for external WiFi shields.
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Specification |
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| Microcontroller | ATmega4809 | ATmega328P (SMD) | ATmega328P (Through hole) |
| USB connector | Micro-USB | USB-B | USB-B |
| Digital I/O Pins | 14 | 14 | 14 |
| Analog input pins | 6 | 6 | 6 |
| PWM pins | 5 | 6 | 6 |
| UART | Yes | Yes | Yes |
| I2C | Yes | Yes | Yes |
| SPI | Yes | Yes | Yes |
| I/O Voltage | 5V | 5V | 5V |
| Input voltage (nominal) | 7-12V | 7-12V | 7-12V |
| DC Current per I/O Pin | 20mA | 20 mA | 20 mA |
| Power Supply Connector | Barrel Plug | Barrel Plug | Barrel Plug |
| clock speed | 16 MHz | 16 MHz | 16 MHz |
| USB-Serial chip | ATmega16U2 | CH340 | ATmega16U2 |
| SRAM | 6.144KB | 2KB | 2KB |
| Flash Memory | 48KB | 32KB | 32KB |
| EEPROM | 256 Bytes | 1KB | 1KB |
| Dimensions | 68.6 mm x 53.4 mm | 68.6 mm x 53.4 mm | 68.6 mm x 53.4 mm |
| RADIO MODULE | u-blox NINA-W102 | - | - |
| Inertial Measurement Unit | LSM6DS3TR (3D accelerometer) | - | - |
| LED_BUILTIN | 25 | 13 | 13 |
| Wi-Fi Microprocessor | Yes | - | - |
| Microcontroller | ATmega328IC |
| Wi-Fi Module | Node MCU ESP8266 |
| Input supply voltage (V) | 3.3 ~ 5 |
| Current consumption (mA) | 800 |
| Dimensions | 7 x 5.35 x 1.5cms |
| Weight | 25 grams |