R3 Development Board WeMos WiFi R3 ATMEGA328P/PB Chip CH340G For UNO R3 Arduino Development Board WeMos ESP8266

High-concerned chemical : none is_d : Yes Dissipation Power : N/A Supply Voltage : N/A Application : Computer Type : Module Origin : Mainland China Condition : New Operating Temperature : N/A

R3 SMD Development Board ATMEGA328P CH340G High Performance Stable with USB Cable for Arduino Key Features & Benefits ATMEGA328P-AU (SMD): 16MHz, 32KB Flash.

USB Interface: Power and programming.

CH340G: Stable driver.

Rich I/O: 14 digital (6 PWM), 6 analog.

Power: USB or 5-9V DC.

100% Compatible with official UNO R3.

Header pins NOT soldered – user soldering required. Product Description Need a cost‑effective UNO R3 board? This SMD version features ATMEGA328P‑AU with CH340G. Header pins are not soldered – you solder your own pins (straight or right‑angle) for maximum flexibility. USB cable optional. Works with official shields. Perfect for batch integration or DIY users with soldering skills. Quick Start Guide & Important Tips What It Does & What You Need This board does: Run Arduino programs, control peripherals, USB power/programming. This board does NOT: Include WiFi/Bluetooth, battery, header pins (not soldered). You will need: USB cable (included in kit), header pins (2.54mm), soldering iron, computer, sensors. Package includes:

Board Only: UNO R3 SMD (pins not soldered)

With Cable Kit: Board + USB cable ️ Important: Header pins NOT soldered – you must solder your own. We do not offer soldering . Purchase header pins separately.

Power: USB or VIN 5-9V. Do not exceed 9V.

Logic Level: 5V. Use level shifters for 3.3V devices.

Driver: Install CH340G driver first. Arduino IDE Setup (same as standard Uno) Common Questions

Do I need to solder pins? Yes, pins are not soldered. You need to solder 2.54mm header pins yourself.

Can you solder them for me? We do not offer soldering. Please check our other listing for pre‑soldered version.

Driver fails? Download CH340G driver, run as admin, disable driver signature if needed.

Upload fails? Select Arduino Uno, correct COM port, press reset during upload. Specifications MCU: ATMEGA328P‑AU (SMD)

USB‑to‑UART: CH340G

Clock: 16MHz

Logic Level: 5V

Supply: USB or 5-9V

Digital I/O: 14 (6 PWM)

Analog Input: 6

Flash: 32KB

Header pins: Not soldered

Dimensions: 68.6×53.4mm Package Includes Note: Manual measurement, allow 1‑3mm error. Colors may vary.

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