Wemos D1 WiFi Uno Based ESP8266
The D1 R2 is a WiFi-enabled development board based on the ESP8266EX microcontroller. Designed in the familiar Arduino UNO form factor, it provides an ideal platform for IoT projects while supporting both Arduino IDE and NodeMCU environments. Its onboard switching power supply, versatile I/O capabilities, and wireless functionality make it suitable for a wide variety of applications.
Package Includes:
- 1 x D1 R2 ESP8266 WiFi Development Board
Features:
- Microcontroller (ESP8266EX): Built-in WiFi capability with low power consumption, ideal for IoT applications.
- Operating Voltage: 3.3V logic level operation, matching the ESP8266EX specifications.
- Digital I/O Pins: 11 digital pins (except D0) support interrupt, PWM, I2C, and one-wire communication.
- Analog Input: 1 analog input pin (max 3.2V) for reading sensor data.
- Flash Memory: 4MB onboard flash storage for code and data storage.
- Power Supply: Integrated switching power supply accepts 9V–12V input and outputs 5V at up to 1A.
- Form Factor: UNO-style layout for compatibility with standard Arduino shields and breadboard-friendly design.
Specifications:
- Microcontroller: ESP8266EX
- Operating Voltage: 3.3V
- Digital I/O Pins: 11 (D0 lacks advanced features)
- Analog Input Pins: 1 (3.2V max)
- Flash Memory: 4MB
- Input Voltage (Vin): 9V–12V
- Output: 5V @ 1A Max
- Board Dimensions: 68.6mm x 53.4mm (2.701" x 2.102")
- Weight: 21.8g (0.769oz)
Note:
This board operates at 3.3V logic. Directly connecting 5V devices to the GPIO pins may damage the board. Use a logic level converter when interfacing with 5V devices.
Pinout:
| Pin | Function | ESP8266 Pin |
|---|---|---|
| TX | TXD | TXD |
| RX | RXD | RXD |
| A0 | Analog input (max 3.3V) | A0 |
| D0 | IO | GPIO16 |
| D1 | IO, SCL | GPIO5 |
| D2 | IO, SDA | GPIO4 |
| D3 | IO, Pull-up | GPIO0 |
| D4 | IO, Pull-up, BUILTIN_LED | GPIO2 |
| D5 | IO, SCK | GPIO14 |
| D6 | IO, MISO | GPIO12 |
| D7 | IO, MOSI | GPIO13 |
| D8 | IO, Pull-down, SS | GPIO15 |
| G | Ground | GND |
| 5V | 5V Output | – |
| 3V3 | 3.3V Output | 3.3V |
| RST | Reset | RST |
Features:
- Microcontroller (ESP8266EX): Built-in WiFi capability with low power consumption, ideal for IoT applications.
- Operating Voltage: 3.3V logic level operation, matching the ESP8266EX specifications.
- Digital I/O Pins: 11 digital pins (except D0) support interrupt, PWM, I2C, and one-wire communication.
- Analog Input: 1 analog input pin (max 3.2V) for reading sensor data.
- Flash Memory: 4MB onboard flash storage for code and data storage.
- Power Supply: Integrated switching power supply accepts 9V–12V input and outputs 5V at up to 1A.
- Form Factor: UNO-style layout for compatibility with standard Arduino shields and breadboard-friendly design.
Specifications:
- Microcontroller: ESP8266EX
- Operating Voltage: 3.3V
- Digital I/O Pins: 11 (D0 lacks advanced features)
- Analog Input Pins: 1 (3.2V max)
- Flash Memory: 4MB
- Input Voltage (Vin): 9V–12V
- Output: 5V @ 1A Max
- Board Dimensions: 68.6mm x 53.4mm (2.701" x 2.102")
- Weight: 21.8g (0.769oz)
Note:
This board operates at 3.3V logic. Directly connecting 5V devices to the GPIO pins may damage the board. Use a logic level converter when interfacing with 5V devices.
Pinout:
| Pin | Function | ESP8266 Pin |
|---|---|---|
| TX | TXD | TXD |
| RX | RXD | RXD |
| A0 | Analog input (max 3.3V) | A0 |
| D0 | IO | GPIO16 |
| D1 | IO, SCL | GPIO5 |
| D2 | IO, SDA | GPIO4 |
| D3 | IO, Pull-up | GPIO0 |
| D4 | IO, Pull-up, BUILTIN_LED | GPIO2 |
| D5 | IO, SCK | GPIO14 |
| D6 | IO, MISO | GPIO12 |
| D7 | IO, MOSI | GPIO13 |
| D8 | IO, Pull-down, SS | GPIO15 |
| G | Ground | GND |
| 5V | 5V Output | – |
| 3V3 | 3.3V Output | 3.3V |
| RST | Reset | RST |