ESP32-C3 with 0.42 Inch OLED Development Board

01Space manufactures this Arduino, MicroPython, and the ESP-IDF. It is a compatible ultra-compact development board with WiFi, BLE, Display, etc. Powered by an ESP32 C3 microcontroller and a display that's almost as small as the USB Type-C port that powers it, the ESP32-C3-0.42LCD features a RISC-V core @ 160 MHz, 4MB flash, 2.4GHz Wi-Fi, and Bluetooth 5 LE with Long-Range support.

ESP32-C3 is a low-cost microcontroller from Espressif that supports 2.4 GHz Wi-Fi and Bluetooth® Low Energy (Bluetooth 5 (LE)). Use RISC V as the core. There's a minimum number of pins on this chip, as it's specifically designed to be low cost and for simpler projects than ESP32-Sx or ESP32 classics with their large number of GPIO.

It has built-in USB-to-Serial, but not native USB. The chip used here has 4MB of Flash memory and 400 KB of SRAM. The ESP32-C3 integrates a rich set of peripherals, ranging from UART, I2C, I2S, remote control peripheral, LED PWM controller, general DMA controller, TWAI controller, USB Serial/JTAG controller, temperature sensor, and ADC. It also includes SPI, Dual SPI, and Quad SPI interfaces. There is no DAC or native capacitive touch. With its state-of-the-art power and RF performance, this SoC is an ideal choice for a wide variety of application scenarios relating to the Internet of Things (IoT), wearable electronics, and smart homes. 

The board features pins down either side for breadboard compatibility and a USB Type-C port to the top for data and power. Just beneath this is the aforementioned display, an ultra-compact glass panel built on organic light-emitting diode (OLED) rather than liquid-crystal display (LCD) technology.

Elsewhere on the board are physical reset and boot-select buttons, a single RGB LED linked to the ESP32-C3's general-purpose input/output (GPIO) pin, and a power indicator LED. A total of 11 of the RP2040's GPIO pins are brought out to physical pins, including access to all four analog to digital converters (ADCs), two SPI, two I2C, and one UART bus alongside regulated 3.3V, USB 5V, battery, and ground power pins — along with a bonus Qwiic/STEMMA QT connector on the underside for solder-free linking to external sensor boards.

The board includes a Qwiic/STEMMA QT I2C header for easy expansion...

For software compatibility, the board can be treated as a Raspberry Pi Pico — meaning there's support in both MicroPython and CircuitPython, or it can be used with the Arduino IDE using Earle Philhower's community Arduino core. For the latter, a selection of example programs — including one that loads and displays small animated GIFs on the single-color display is available

Links:

• Official Github Page - Programming guide and sample programs