Key Takeaways
1. The Aitver ESP32-C3 0.42-inch OLED is compact and ideal for IoT prototypes and wearables.
2. It features a 32-bit RISC-V core, 400 kB RAM, and 4MB SPI Flash with lower power usage compared to the ESP32-S3.
3. The board includes a 0.42-inch OLED display with 72×40 pixel mapping and supports various connectivity options like Wi-Fi 4 and Bluetooth 5.0 BLE.
4. It has 13 usable GPIOs with UART, I2C, SPI, and ADC interfaces, and comes with a USB-C port for power and programming.
5. The board can be programmed using Arduino IDE or ESP-IDF and is priced around US$4.99, with some listings as low as US$0.99 during promotions.
While browsing through AliExpress for exciting products and great bargains, I discovered the Aitver ESP32-C3 0.42-inch OLED. This compact development board, based on the ESP32-C3, is available under various names on AliExpress. It’s perfect for creating quick IoT prototypes, wearables, or display projects because of its small size and compatibility with Arduino and MicroPython.
Design and Efficiency
This board opts for the ESP32-C3 instead of the more widely used ESP32-S3. This choice makes it ideal for smaller and wearable projects thanks to its lower power usage and cost. Though it’s not as strong as the ESP32-S3, it features a 32-bit RISC-V core, 400 kB of static RAM, and 4MB of SPI Flash, which is pretty impressive for such a little MCU. Furthermore, it supports Wi-Fi 4 and Bluetooth 5.0 Low Energy (BLE) connections, equipped with a ceremci chip antenna for enhanced connectivity.
Display and Features
The board comes with a 0.42-inch OLED that is controlled by an SSD1306 controller, featuring a unique 72×40 pixel mapping. However, the AliExpress listing clearly states that the starting coordinate is 128×64. For power supply and programming, there is a USB-C port on board, in addition to a boot and reset button. It also provides thirteen usable GPIOs with interfaces for UART, I2C, SPI, and ADC, along with an onboard LED linked to GPIO8.
Programming and Pricing
You can program this board using either the Arduino IDE or ESP-IDF, and there are numerous online guides for the ESP32-C3 boards. The Aitver ESP32-C3 0.42-inch OLED Development Board is priced at approximately US$4.99 on AliExpress. There are also other listings available for just US$0.99, but these are part of a welcome offer, and you might not receive it at that price.
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