01Space “ESP32-C3-0.42LCD” is a small (23.5 x 18 mm) board equipped with ESP32-C3 RISC-V WiFi and Bluetooth microcontroller, a 0.42-inch display, and a Qwicc I2C connector to easily add modules such as sensors.
The first time I saw it, the form factor immediately reminded me of the nRF52840-based XIAO BLE Sense board I just used to test Edge Impulse machine learning framework. Both boards should have similar use cases, but XIAO BLE Sense includes a 6-axis IMU sensor, and I had to connect an OLED display, while the ESP32-C3 board already integrates a display, and I would have had to connect an external Qwicc module with an accelerometer.
ESP32-C3-0.42LCD specifications:
- SoC – ESP32-C3FH4 SoC with RISC-V core @ 160 MHz, 4MB flash, 2.4GHz Wi-Fi, and Bluetooth 5 LE with Long-Range support
- Ceramic antenna
- Display – 0.42-inch LCD
- USB – 1x USB Type-C port for power and programming
- Expansion
- Qwiic I2C connector
- 7-pin and 8-pin headers with up to 11x GPIOs, SPI, I2C, 4x ADC, 1x UART, 5V, 3.3V, BAT, GND
- Misc
- Reset and Boot buttons
- RGB LED, power LED
- Power Supply
- 5V via USB-C port or Vin
- BAT pin for battery input
- 3.3V regulator with 500mA peak output
- Dimensions – 23.5 x 18 mm
- Weight – About 2.6 grams
The developer says the board is compatible with MicroPython, Arduino, and the ESP-IDF, and provides several Arduino sketches (BLE, WiFi host/station, SCD01 sensor, graphics, etc..) and basic instructions on Github.
![ESP32-C3 Qwiic SCD41 environmental sensor](https://www.cnx-software.com/wp-content/uploads/2022/05/ESP32-C3-Qwiic-SCD41-environmental-sensor-720x540.jpg)
It’s not the first time we write about 01Space boards as we previously covered their ESP32 boards with 25 RGB LEDs also pictured above.
ESP32-C3-0.42LCD development board is sold on Aliexpress for $9.95 plus shipping.
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Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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I didn’t know that such tiny screens existed, that can have various use cases in many areas!
Same. I just want a few of the displays! Maybe those are the ones they’re using for individually customized OLED keycaps?
I just want a few of the boards without displays :), would be nice to make a ispindle.
But it comes to 18€ incl shipping, that way to much for what it is.
Likely, yes. I just found some on Aliexpress, they’re called 0.42″ and measure rougly 5x9mm: https://fave.co/3wpct6O
Thank you. They are 72×40 and it looks like shipping costs have skyrocketed. *sigh*
Why did you put that in a privacy-violating tracking URL shortener that’s blocked by my browser?
Anyway, the AliExpress shop I found a while ago is https://fave.co/3aeyi0g and when buying a lot, the effective price per piece, including shipping, is under $1.30 for me/
Links to Aliexpress, Banggood, etc… will be converted to affiliate links in comments.
Shipping is very expensive.