Uno WiFi R3 Atmega328p NodeMCU ESP8266 8mb Memory USB-TTL CH340G Compatible

The Uno WiFi R3 board integrates an ATmega328P microcontroller (Arduino Uno R3 compatible) with an ESP8266 WiFi module (NodeMCU-style) featuring 8MB flash memory, plus a CH340G USB-to-TTL converter for programming, all on a single board.robu+1​

Key Features

Both the ATmega328P and ESP8266 operate independently or together via dedicated pin headers and a DIP switch for mode selection (e.g., USB to ATmega, USB to ESP8266, or ATmega-ESP8266 passthrough). It supports 5V logic/operation, 14 digital I/O pins, 6 analog inputs, and firmware/sketch updates over USB for either chip. Operating temperature ranges from -40°C to +125°C, with power input up to 500-800mA via USB.soldermall+2​

Usage Modes

Set DIP switches to connect USB serial to ATmega328P for Arduino IDE programming, to ESP8266 for AT firmware updates, or bridge them for WiFi control of Uno sketches. Each section has full Uno R3 pinout access for sensors/modules, enabling hybrid projects like IoT automation without extra wiring.makerbazar+3​

Applications

Ideal for your industrial automation needs, such as integrating PLC-like logic on ATmega with ESP8266 WiFi for remote SCADA monitoring or IoT data from sensors in power systems. Compatible with Arduino IDE (select “Arduino Uno” or “NodeMCU 1.0” boards) after CH340 drivers install; clones may need minor tweaks for stability

Verified Specifications

It includes a CH340G USB-TTL converter, USB 5V power input (max 500mA), 5V logic level, and 5V operating voltage, with 14 digital I/O pins and 6 analog inputs. Serial interface support and an operating temperature range of -40°C to +125°C align with the details given.rees52+2​

Additional Specs

Current draw reaches up to 800mA, with VIN/DC jack accepting 9-24V, WiFi via 802.11 b/g/n (2.4GHz), and 8MB flash on the ESP8266. Micro USB interface uses a 16MHz clock for both controllers.robotdyn+2​

Package Confirmation

The package contains exactly one Uno WiFi R3 ATmega328P + NodeMCU ESP8266 board, compatible with Arduino Uno pinouts