ESP8266-DevKitC IoT Development Board (Onboard ESP-WROOM-02D WiFi Module)

SKU: FA1055
Microcontroller

ESP8266EX (32-bit Tensilica L106)
Wireless Protocol

Wi-Fi 802.11 b/g/n (2.4 GHz)
Clock Speed

80 MHz (Adjustable up to 160 MHz)
Flash Memory

2MB or 4MB (Depending on specific batch)
SRAM

160 KB (User available: ~50 KB)
Operating Voltage

3.0V – 3.6V (Onboard regulator handles 5V USB)
USB Interface

Micro-USB (typically via CP2102 or Silabs bridge)
Antenna

Onboard PCB trace antenna
The ESP8266-DevKitC is a compact and efficient entry-level development board based on the ESP-WROOM-02D module. Designed by Espressif, it serves as the official hardware platform for the legendary ESP8266 Wi-Fi SoC, providing a stable and professional-grade bridge for connecting everyday devices to the internet.
Long Description
The ESP8266-DevKitC is the direct evolution of early Wi-Fi modules, offering a refined, breadboard-friendly layout that integrates all necessary support components including a USB-to-Serial bridge, voltage regulator, and reset/flash buttons. The onboard ESP-WROOM-02D module is a highly integrated Wi-Fi solution that features a sophisticated self-calibrated RF, allowing it to remain stable under varying operating conditions.
For business purchasers, the ESP-WROOM-02D module is a mature, field-proven component with full FCC/CE/TELEC certifications, making it a low-risk choice for commercial smart-home appliances and industrial monitoring nodes. For individual makers, it remains the most documented Wi-Fi platform in existence, ensuring that thousands of open-source libraries and tutorials are available for immediate project success in 2026.
Key Features
  • Proven Reliability: Features the ESP-WROOM-02D, known for superior RF performance and stability in high-temperature environments.
  • Breadboard Friendly: Slim design allows access to a row of holes on both sides of the board when plugged into a standard breadboard.
  • Automatic Bootloader: Integrated USB-to-Serial bridge with auto-reset circuitry allows for one-click programming without toggling buttons.
  • Low Power Consumption: Advanced power management allows for deep-sleep modes (~20μA), ideal for battery-operated sensor nodes.
  • Extensive Ecosystem: Fully compatible with the Arduino IDE, MicroPython, and Espressif’s own Non-OS and RTOS SDKs.
Usage Instructions
  1. Driver Setup: Connect the board to your computer via a Micro-USB data cable. Ensure you have the appropriate USB-to-Serial drivers installed (typically Silicon Labs CP210x).
  2. Arduino IDE Setup:
    • Add the ESP8266 board manager URL in Preferences.
    • Install “esp8266” from the Boards Manager.
    • Select “Generic ESP8266 Module” or “NodeMCU 1.0” as the board type.
  3. Programming: Write your sketch and click Upload. The board will automatically enter flash mode and restart upon completion.
  4. Peripheral Connection: Use the broken-out pins to connect I2C, SPI, or UART sensors. Note that the ESP8266 has only one Analog-to-Digital Converter (ADC) pin (A0).
Q: Does this board support Bluetooth?

No. The ESP8266 series is Wi-Fi only. If your project requires both Wi-Fi and Bluetooth, we recommend the ESP32 series.

Q: Is the ESP8266-DevKitC 5V tolerant on its I/O pins?

No. The logic level is strictly 3.3V. Connecting 5V sensors directly to the GPIO pins can permanently damage the chip. Always use a level shifter for 5V components.

Q: Can I use this for 2026 Matter-compatible smart home devices?

While the ESP8266 is a Wi-Fi workhorse, it does not support the Matter protocol due to memory and hardware limitations. For Matter projects, please select the ESP32-C3 or ESP32-S3 series.

Q: Why should I choose the ESP8266-DevKitC over the cheaper ESP-01 modules?

The DevKitC is a complete development solution with a built-in voltage regulator and USB-Serial converter. ESP-01 modules require external power supplies and specialized programmers, making them harder to use for prototyping.

Q: What is the maximum range of the onboard antenna?

In an open-air environment, the onboard PCB antenna typically reaches 70–100 meters. Indoors, this range is reduced by walls and interference but remains sufficient for standard home automation.

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