Description

A 25 × 20.5 mm ESP32-C3 board with a 0.42 inch OLED already wired to it. The screen is on GPIO 5 and 6, the USB-C socket goes straight to the chip so there is no driver to install, and sixteen holes bring the rest of the pins out. It seats on the Lonely Binary expansion, screwless terminal and screw terminal bases, which add a LiPo battery connector, charger and power switch.

Highlights

• Screen on board. A 0.42 inch 72 × 40 SH1106 OLED at I²C address 0x3C, handy for readings and debugging.
• Wi-Fi and Bluetooth LE. ESP32-C3FH4, single-core RISC-V at up to 160 MHz, 4 MB flash, 400 kB SRAM.
• Native USB-C. No USB-serial chip and no driver. Reset and BOO buttons for upload mode.
• Sixteen holes in two rows 17.78 mm apart, so it fits across the centre channel of a breadboard.

In the box

• 1 × ESP32-C3 OLED board

Bases, batteries and cables are sold separately.

Specifications

• Chip: ESP32-C3FH4, single-core RISC-V, up to 160 MHz
• Memory: 4 MB flash, 400 kB SRAM, no PSRAM
• Display: 0.42 in, 72 × 40, SH1106 at 0x3C, on GPIO 5 (SDA) and 6 (SCL)
• LEDs: blue on GPIO 8, red power
• Size: 25 × 20.5 mm

Works with Arduino IDE, ESP-IDF and MicroPython.