Description

Tiny ESP32-C3 boards with a built-in OLED screen, plus three expansion shields that add a LiPo battery port. For battery-powered sensors and small connected devices.

Highlights

• Screen on board. A 0.42-inch 72 × 40 OLED is already wired, handy for readings and debugging.
• Wi-Fi and Bluetooth LE. ESP32-C3 RISC-V chip at up to 160MHz with 4MB flash.
• Battery backup. With USB-C connected the shield runs the board and charges the battery; unplug it and the battery takes over without a reboot.
• Three shield styles. 2.54mm expansion, screw terminal and non-screw terminal, each with a LiPo port and a regulated 3.3V supply.
• Battery monitoring. Short the monitor pads to read the battery voltage.

In the box

• 3 × ESP32-C3 OLED development board
• 1 × 2.54mm expansion shield with LiPo battery port
• 1 × screw terminal shield with LiPo battery port
• 1 × non-screw terminal shield with LiPo battery port

Specifications

• Chip: ESP32-C3FH4, single-core RISC-V, up to 160MHz
• Memory: 4MB flash, 400kB SRAM, no PSRAM
• Display: 0.42 in, 72 × 40, SH1106 at 0x3C
• Board size: 25 × 20.5mm

Works with

Arduino IDE, ESP-IDF and MicroPython. Contents shown are for the 3-pack set; LiPo batteries and jumper wires are sold separately.