ESP32-C3 Super Mini Dev Board – 0.42" OLED, WiFi & Bluetooth
ESP32-C3 Super Mini Dev Board – 0.42" OLED, WiFi & Bluetooth
ESP32-C3 Super Mini Development Board with 0.42" OLED Display
The ESP32-C3 Super Mini Development Board is a compact, powerful microcontroller board based on the ESP32-C3FN4/FH4 chip. Featuring a built-in 0.42-inch OLED display, dual-mode WiFi and Bluetooth connectivity, a high-performance ceramic antenna, and 4MB of onboard Flash, this board is the ideal choice for IoT prototyping, wearable projects, and space-constrained embedded applications.
⚠️ Important Note: This 0.42-inch OLED screen uses a 128×64 resolution with a display starting point of (13, 14) — it is NOT a direct drop-in replacement for other standard 0.42-inch OLED modules. Please ensure your code and libraries account for this offset before purchasing.
Key Features
- Chip: ESP32-C3FN4 / ESP32-C3FH4 — RISC-V 32-bit single-core processor
- Built-in Flash: 4MB onboard Flash memory
- Display: 0.42-inch OLED screen, 128×64 resolution (active area: 40×2 offset start at 13,14)
- Wireless Connectivity: WiFi (2.4GHz 802.11 b/g/n) + Bluetooth 5.0 (LE)
- Antenna: Ceramic antenna for reliable wireless signal
- USB Download: Supports direct USB flashing — no external programmer needed
- Form Factor: Super Mini — ultra-compact design for tight spaces
- Customizable: Fully programmable via Arduino IDE, ESP-IDF, and MicroPython
Technical Specifications
| Parameter | Value |
|---|---|
| MCU | ESP32-C3FN4 / FH4 |
| Flash Memory | 4MB |
| Display | 0.42" OLED, 128×64 (start point: 13,14) |
| WiFi | 2.4GHz 802.11 b/g/n |
| Bluetooth | Bluetooth 5.0 LE |
| Antenna | Ceramic Antenna |
| Programming | USB (direct download) |
| Country of Origin | Made in China |
Who Is This For?
This board is perfect for makers, hobbyists, engineers, and students who need a tiny but capable development board for IoT devices, smart sensors, BLE beacons, data loggers, wearable electronics, and any WiFi/Bluetooth-enabled project where board size matters.
What's in the Box?
- 1 × ESP32-C3 Super Mini Development Board with 0.42" OLED
Learn more: ENERGY STAR product efficiency guidance
Frequently Asked Questions
Q: Can I replace my existing 0.42-inch OLED module with this ESP32-C3 OLED board directly?
A: No. This 0.42-inch OLED uses a 128×64 resolution with a display starting offset of (13, 14), which differs from most standard 0.42-inch OLED modules. You will need to adjust your display initialization code and library settings to account for this offset. It is not a plug-and-play replacement for other 0.42-inch OLED screens.
Q: What programming environments are compatible with the ESP32-C3 Super Mini board?
A: The ESP32-C3 Super Mini development board is compatible with the Arduino IDE (with ESP32 board support package), ESP-IDF (Espressif's native framework), and MicroPython. It supports USB direct download, so no external programmer or USB-to-UART adapter is required.
Q: Does the ESP32-C3 board support both WiFi and Bluetooth simultaneously?
A: Yes. The ESP32-C3 chip supports dual-mode wireless operation with 2.4GHz WiFi (802.11 b/g/n) and Bluetooth 5.0 Low Energy (BLE). The onboard ceramic antenna provides reliable wireless performance in both modes.
Q: How much Flash memory does this development board have?
A: The ESP32-C3 Super Mini board comes with 4MB of built-in Flash memory, providing ample storage for your firmware, application data, and file system (e.g., LittleFS or SPIFFS).
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.