LOLIN(WEMOS) D1 R2 & mini Development Board Pinout and Technical Specifications
Code name: ESP8266_WEMOS_D1MINI
Manufacturer: Wemos
LOLIN(WEMOS) D1 R2 & mini development board is based on esp8266 microcontroller and uses Tensilica Xtensa LX106 architecture. This development board has a maximum CPU frequency of 160 MHz and a maximum data upload size of 81.92 Kb.
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Features
Connectivity
- WiFi: 802.11 b/g/n (2.4 GHz)
- Bluetooth: No
- BLE: No
Technical specs
| Clock Speed | 160 MHz |
| Upload Maximum Data size | 81920 |
| Microcontroller | esp8266 |
| Architecture | Tensilica Xtensa LX106 |
Datasheet
LOLIN(WEMOS) D1 R2 & mini DatasheetLOLIN(WEMOS) D1 R2 & mini Pinout
The pinout diagram for this ESP32-based module highlights its versatility and ease of use for IoT and embedded projects. The module includes a RST pin for resetting the board, which is crucial for debugging and testing. On the power side, the board provides a 3.3V output pin and VBUS for powering external components, along with multiple GND pins to ensure proper grounding.
This pinout features a range of GPIO pins, such as GPIO16, GPIO14, GPIO15, and GPIO4, all of which are multi-functional and can be used for both digital I/O and peripheral interfacing. Communication protocols are well-supported, with dedicated pins for SPI, including SCK (GPIO14), MISO (GPIO12), and MOSI (GPIO13). These pins enable high-speed communication with external devices like sensors, displays, and storage modules.
For I2C communication, the board uses GPIO5 for SCL and GPIO4 for SDA, making it easy to connect to peripherals like temperature sensors, accelerometers, or OLED displays. A built-in LED is connected to GPIO2, allowing developers to use it for visual feedback or debugging during project development.
LOLIN(WEMOS) D1 R2 & mini Pins Mapping Arduino IDE
Below you can find the LOLIN(WEMOS) D1 R2 & mini pinout. This development board provides digital IO pins, out of which can be used as an external interrupt pins and as analog input pins .
| Pin | Analog | Touch | PWM | Other |
|---|---|---|---|---|
| 0 | ||||
| 1 | TX | |||
| 2 | LED_BUILTIN | |||
| 3 | RX | |||
| 4 | ||||
| 5 | ||||
| 12 | ||||
| 13 | ||||
| 14 | ||||
| 15 | ||||
| 16 | ||||
| PIN_WIRE_SDA | SDA | |||
| PIN_WIRE_SCL | SCL |
Default Tools
| Bootloader tool | |
| Uploader tool | esptool |
| Network uploader tool | |
| Bootloader address | |
| Flash mode | dio |
| Boot mode | |
| PSRAM type | |
| Maximum data size | 80 Kb (81920 B) |
The LOLIN(WEMOS) D1 R2 & mini development board by default uses esptool uploader tool and bootloader tool. Flash mode for LOLIN(WEMOS) D1 R2 & mini development board by default is dio. When using Arduino IDE, the maximum data size for variables is 80 Kb (81920 B).
