WeMos D1 WiFi UNO ESP8266 Development Board – Arduino Compatible

Description

WeMos D1 WiFi UNO – ESP8266 Development Board

The WeMos D1 WiFi UNO is an Arduino-compatible development board powered by the ESP-8266EX WiFi chip. It combines the familiar UNO form factor with built-in WiFi connectivity, making it the easiest way to add wireless capability to your projects. Program it directly in the Arduino IDE — or upload sketches wirelessly via OTA (Over-The-Air) without plugging in a USB cable.

With 11 digital I/O pins, 1 analog input, and onboard 5V regulated power supply supporting up to 24V input, this board is ready for IoT projects, home automation, wireless sensor networks, and cloud-connected devices right out of the box.

Key Features

• Built-in ESP8266 WiFi – Connect to any 2.4 GHz WiFi network directly from the board. No external WiFi module, shield, or wiring needed.
• Arduino IDE Compatible – Program using the same Arduino IDE you already know. Install the ESP8266 board package and start coding immediately with familiar syntax.
• OTA Wireless Upload – Upload sketches wirelessly over WiFi without connecting a USB cable. Perfect for deployed devices that are hard to physically reach.
• UNO Form Factor – Same board shape and pin layout as the Arduino UNO. Most UNO shields are physically compatible (check pin voltage compatibility).
• 11 Digital I/O Pins – All GPIO pins support interrupt, PWM, I2C, and one-wire communication. Enough for most sensor and actuator projects.
• 1 Analog Input Pin – 10-bit ADC for reading analog sensors like potentiometers, light sensors, and voltage dividers (0–3.3V range).
• Wide Voltage Input – Onboard switching power supply accepts up to 24V DC input and regulates down to 5V at 1A. Ideal for industrial and automotive power environments.
• 3.3V Logic Level – ESP8266 operates at 3.3V. The onboard regulator handles power conversion, but external 5V sensors may need a level shifter.
• Micro USB Interface – Program and power the board via a standard micro USB cable. CH340G USB-to-serial chip handles communication.
• Compact & Lightweight – Full WiFi + microcontroller in UNO-sized footprint. No additional modules or breakout boards required.

Technical Specifications

• MCU: ESP-8266EX
• WiFi: 802.11 b/g/n (2.4 GHz)
• Operating Voltage: 3.3V
• Input Voltage: 5–24V DC (onboard regulator)
• Regulated Output: 5V / 1A
• Digital I/O Pins: 11
• Analog Input Pins: 1 (10-bit ADC, 0–3.3V)
• Flash Memory: 4 MB
• Clock Speed: 80 MHz (can be set to 160 MHz)
• USB Chip: CH340G
• Form Factor: Arduino UNO compatible

Ideal Applications

• IoT & Cloud Projects – Send sensor data to ThingSpeak, Blynk, Firebase, MQTT brokers, or your own web server over WiFi.
• Home Automation – Control lights, fans, relays, and appliances via WiFi. Build a web dashboard accessible from your phone.
• Wireless Sensor Networks – Deploy temperature, humidity, motion, and air quality sensors that report data wirelessly without running cables.
• Weather Stations – Read environmental sensors and push live data to online dashboards or local displays.
• Smart Agriculture – Monitor soil moisture, greenhouse conditions, and irrigation systems remotely via WiFi.
• Remote Monitoring & Alerts – Get email or push notifications when sensor values cross thresholds — temperature alarms, door sensors, water leak detectors.
• OTA-Deployed Devices – Install the board in hard-to-reach locations and update firmware wirelessly without physical access.

Getting Started

• Step 1: Install the Arduino IDE on your computer.
• Step 2: Open Arduino IDE → File → Preferences → paste this URL in “Additional Board Manager URLs”: http://arduino.esp8266.com/stable/package_esp8266com_index.json
• Step 3: Go to Tools → Board → Board Manager → search “ESP8266” → install the package.
• Step 4: Select Board: “WeMos D1 R1” or “LOLIN(WeMos) D1 R1” from the board menu.
• Step 5: Install the CH340G driver if needed, connect via USB, select COM port, and upload your first sketch.

For full documentation, pin diagrams, and example projects, visit the official WeMos D1 documentation.

What’s Included

• 1 × WeMos D1 WiFi UNO ESP8266 Development Board

The WeMos D1 is the fastest way to add WiFi to your Arduino projects — same IDE, same coding style, but now your devices connect to the internet. Perfect for anyone stepping into IoT without learning a completely new platform.