The ESP32-DEVKITC is a versatile development board featuring the ESP32-WROOM-32D module with 16MB Flash memory. It combines robust wireless connectivity with dual-core processing, making it ideal for IoT, automation, and wireless sensor applications.
Technical Specifications
- Module: ESP32-WROOM-32D
- Flash Memory: 16 MB
- Microcontroller: Xtensa® 32-bit LX6 dual-core processor, up to 240 MHz
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Wireless Connectivity:
- WiFi 802.11 b/g/n (2.4 GHz)
- Bluetooth v4.2 BR/EDR + BLE
- Antenna: PCB On-board antenna
- GPIO Pins: Up to 30 GPIOs (via header pins)
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Interfaces:
- UART, SPI, I²C, I²S
- 12-bit ADC, 2x 8-bit DAC, PWM, touch sensors
- USB-to-Serial: Integrated (CP2102 or equivalent)
- Operating Voltage: 3.3V
- Power Input: 5V via Micro USB
- Development Support: Arduino IDE, ESP-IDF, MicroPython, PlatformIO
- Board Dimensions: Approx. 51 × 25 mm
- Applications: IoT systems, smart automation, BLE-based devices, wireless data acquisition
Why Choose the 16MB Flash Version?
- 16MB of flash is 4× the standard 4MB found on most entry-level ESP32 boards — more room for OTA (over-the-air) firmware updates alongside the running application, plus SPIFFS/LittleFS file storage for web assets, logs, or configuration data.
- Same dual-core Xtensa LX6 CPU, WiFi, and Bluetooth as standard ESP32-WROOM boards — the extra flash doesn't change performance, only storage headroom.
- Integrated CP2102-equivalent USB-to-serial makes flashing and debugging straightforward over a single USB cable.
- Don't need the extra flash? The ESP-32S 30-Pin Development Board covers standard ESP32 projects at a lower cost. Need a much smaller footprint instead? See the ESP32-C3 Super Mini.
Common Uses for This Board
- IoT projects that need OTA firmware updates without erasing the running application.
- Data-logging or web-server projects that store files (SPIFFS/LittleFS) directly on the board's flash.
- Smart automation and BLE-based devices needing standard ESP32 dual-core performance.
- Wireless data-acquisition systems collecting and briefly buffering sensor data on-board.
- Browse RAM Electronics' full range of ESP32 & ESP8266 boards and IoT devices for related modules.
Frequently Asked Questions
What's the benefit of 16MB flash over the standard 4MB ESP32 boards?
More on-board storage for OTA firmware updates (keeping a backup image while updating), plus room for a SPIFFS/LittleFS file system to store web assets, logs, or configuration data alongside the application code.
Does more flash memory make the board faster?
No — flash size affects storage capacity, not processing speed. This board uses the same dual-core Xtensa LX6 CPU at up to 240MHz as standard ESP32-WROOM-32 boards.
Can I program this board with Arduino IDE?
Yes — it supports Arduino IDE, ESP-IDF, MicroPython, and PlatformIO, the same development workflows as other ESP32 boards.
Is the USB-to-serial chip built in, or do I need a separate programmer?
It's built in — the board includes an integrated CP2102-equivalent USB-to-serial interface, so a single USB cable handles both power and programming.
Conclusion
Need extra on-board storage for OTA updates or a file system in your ESP32 project? Shop the ESP32-DevKitC (WROOM-32D, 16MB Flash) at RAM Electronics.
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