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SKU: 220125003769
Brand: Made in China
Warranty: 3 Days
Model: WeMos D1 R1 ESP01 ESP03 ESP M2 DT 06
৳ 330.04
Category: ESP8266
Additional Information
The Wemos D1 Mini is a budget-friendly, ESP8266‑based WiFi board which is compact yet and as powerful as any NodeMCU or ESP8266 board by Espressif Systems. It comes with built-in WiFi connectivity, making it an ideal choice for IoT (Internet of Things) projects, smart home devices, and small-scale automation systems.
The D1 Mini is faster, more flexible, and lower in cost than traditional microcontrollers like Arduino or PIC, offering built‑in WiFi and strong online support for beginners.
If you’re building a small, modular, breadboard-friendly IoT project, the Wemos D1 Mini is the ideal choice over the NodeMCU.
| Parameter | Details |
| Processor | Tensilica L106 32-bit RISC |
| Clock Speed | 80 MHz (up to 160 MHz) |
| Flash Memory | 4 MB |
| SRAM | 50 KB (Usable) |
| WiFi | 802.11 b/g/n (2.4 GHz) |
| Bluetooth | No |
| GPIO Pins | 11 (D0–D8, RX, TX) |
| ADC | 1 (10-bit) |
| PWM Pins | All GPIOs (software-supported) |
| Antenna | On-board PCB antenna |
| Programming Port | USB Type-C |
| Logic Voltage | 3.3V |
| Input Voltage (via USB) | 5V |
| Dimensions | 35 × 25 mm (±1 mm) |
The D1 Mini board exposes 11 GPIO pins which can be used for digital I/O, PWM, I2C, SPI, and ADC functionalities.
| Pin | GPIO | Function | Safe | Remarks |
| D0 | GPIO16 | Wake / No PWM / No I2C | ⚠️ | HIGH at boot; used to wake up from deep sleep |
| D1 | GPIO5 | SCL / I2C | ✅ | General purpose |
| D2 | GPIO4 | SDA / I2C | ✅ | General purpose |
| D3 | GPIO0 | Flash button | ⚠️ | Connected to FLASH button; boot fails if pulled LOW |
| D4 | GPIO2 | Built-in LED | ⚠️ | HIGH at boot; boot fails if pulled LOW |
| D5 | GPIO14 | SCK / SPI | ✅ | General purpose |
| D6 | GPIO12 | MISO / SPI | ✅ | General purpose |
| D7 | GPIO13 | MOSI / SPI | ✅ | General purpose |
| D8 | GPIO15 | CS / SPI | ⚠️ | Required for boot; boot fails if pulled HIGH |
| RX | GPIO3 | UART RX | ⚠️ | Used for flashing/debugging; careful if repurposed |
| TX | GPIO1 | UART TX | ⚠️ | Used for flashing/debugging; careful if repurposed |
| A0 | ADC0 | Analog Input (0–3.3V) | ⚠️ | Input only; cannot be configured as output |
All of the digital I/O (except D0) support PWM and interrupts and can be configured with pull‑up or pull‑down resistors. There are 11 digital I/O pins total, but if serial TX/RX are used then 9 remain for general‑purpose use, and the on‑board blue LED is connected to pin D4 (GPIO2) and accessible via the LED_BUILTIN constant. The digital I/O is specified for 3.3 V, although many setups tolerate 5V logic.
On the analog side, there is only a single 10‑bit ADC input, which may limit use for some sensor applications unless you add an external analog multiplexer or ADC module. The analog pin A0 must be limited to a maximum of 3.2 V or less, as the board includes a built‑in 100 K/220 K resistor voltage divider that reduces the input to about 1 V at the ESP8266 processor.
Some NodeMCU boards are wider and longer than the Wemos D1 Mini, making them harder to use on breadboards. While NodeMCUs offer more pins, they take up more space.
The D1 Mini is easy to upgrade and adjust. You can use pin, socket, or long-leg headers to connect or solder parts as needed, keeping your setup small and flexible.
The main differences are that the WeMos D1 Mini is a complete breadboard-friendly development board with more I/O pins, a USB port, and onboard circuitry, while the ESP-01 is a much smaller, compact module with only a few pins exposed, requiring more external components and a separate USB-to-serial programmer.
| Feature | Wemos D1 Mini | ESP-01 |
| USB Port | Built-in | Requires external adapter |
| I/O Pins | 11 GPIOs | 2 GPIOs |
| Power | 5V via USB | 3.3V only |
| Voltage Regulator | Yes | No |
The D1 Mini is better for beginners and quick project building, while the ESP-01 is best for projects with limited space that need only a few connections.
The module can be powered via the USB port or by using an external 5V power supply connected to the 5V pin.
The onboard DE-A1D voltage regulator converts the 5V input to 3.3V, which powers the ESP8266 chip.
The 3.3V pin provides a 3.3V output when the module is powered through USB or 5V, and this output can be used to power small external devices such as sensors.
For best results, it’s recommended to power the module from 5V.
The ESP8266 D1 Mini can be programmed using various platforms, such as the Arduino IDE, PlatformIO with Visual Studio Code, and MicroPython.
For a detailed Arduino setup guide, visit:
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৳ 330.04
The latest and best price of Wemos D1 Mini ESP8266 WiFi NodeMCU IoT Module Wireless Microcontroller in BD is BDT 330.04 Taka. You can purchase the Wemos D1 Mini ESP8266 WiFi NodeMCU IoT Module Wireless Microcontroller at the best price on TechShopBD.com or visit our office to pick yours up today.
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