Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards
Origin	-
Microcontroller	ESP32-C3 (RISC-V 32-bit)
Display Type	0.42-inch OLED
Connectivity	Wi-Fi 2.4 GHz, Bluetooth 5 (LE)
Antenna	On-board Ceramic Antenna
Flash Memory	4 MB
Operating Voltage	3.3V
Interface	USB Type-C
GPIO Pins	22 Programmable GPIOs
Dimensions	56mm x 24mm x 12mm
Compatibility	Arduino IDE, ESP-IDF, MicroPython

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Excellent value for money

For the price, you get Wi-Fi, BLE, and a display all on one tiny board. The USB-C connection makes programming very convenient. I've used it for a weather station project with great results.

Anonymous

Mar 26, 2026

Rating: 4/5

Solid performance

Bluetooth pairing is quick and reliable. The only reason for 4 stars instead of 5 is that the OLED brightness could be slightly higher for outdoor use, but it's fine for indoor applications.

Anonymous

Mar 20, 2026

Rating: 5/5

Great for learning embedded systems

As a student, this board is perfect for learning about IoT. The community support is huge, and getting the example codes to run on the OLED screen was straightforward using Arduino IDE.

Anonymous

Mar 16, 2026

Rating: 5/5

Low power consumption

I was impressed by the low power draw in deep sleep mode. The C3 chip is efficient, and the small form factor fits perfectly into my wearable prototype enclosure.

Anonymous

Mar 09, 2026

Rating: 5/5

Perfect for compact IoT projects

The integrated OLED screen is a game changer for debugging without needing a serial monitor. The ceramic antenna provides stable Wi-Fi connectivity in my tests. Highly recommended for portable devices.

Anonymous

Mar 07, 2026

Rating: 4/5

Great board, minor documentation gaps

Hardware quality is excellent and the RISC-V architecture runs smoothly. I had to dig into the ESP-IDF docs to find specific pin mappings for the OLED, but once set up, it works flawlessly.

5 FAQ

Q: Which GPIO pins are broken out on the header?

A: Most GPIOs are accessible via the headers, including GPIO2 through GPIO10 and others. Please refer to the pinout diagram in the product wiki for the complete mapping, as some pins are shared with the OLED or Flash.

Q: Does this board support MicroPython out of the box?

A: The board comes with a default firmware, but it is fully compatible with MicroPython. You will need to flash the MicroPython firmware binary using a tool like esptool.py to get started.

Q: Is the ceramic antenna suitable for long-range applications?

A: The ceramic antenna offers good performance for standard IoT ranges (typically up to 30-50 meters indoors depending on obstacles). For extreme long-range needs, an external antenna version might be more appropriate.

Q: Can I power this board via the VIN pin instead of USB?

A: Yes, you can power the board via the 5V VIN pin. The onboard regulator will step it down to 3.3V for the ESP32-C3 and peripherals. Ensure the input voltage does not exceed 6V.

Q: What is the resolution of the 0.42-inch OLED screen?

A: The integrated OLED display has a resolution of 72x40 pixels. It is sufficient for displaying sensor data, status icons, and simple text menus.

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