Ultra-compact RISC-V ESP32-C3 board with native USB-C, Wi-Fi + BLE 5, and a built-in WS2812 RGB LED. Great for low-power IoT, wearables, and tiny controllers. Available with (Zero-M) or without pre-soldered headers. Highlights ESP32-C3FH4 @ up to 160 MHz, 4 MB flash, 400 KB SRAM. 2.4 GHz Wi-Fi (b/g/n) + Bluetooth 5 LE. USB-C native (USB-CDC) — no USB-UART chip; enter boot by holding BOOT then plug USB. 15 GPIO, I/O mux: 3× SPI, 1× I²C, 2× UART, 1× I²S, 2× ADC. Onboard WS2812 RGB LED on GPIO10; TX=GPIO21 / RX=GPIO20 by default. Specs Property Value MCU ESP32-C3 (RISC-V, single-core up to 160 MHz) Memory 400 KB SRAM • 4 MB Flash Wireless 2.4 GHz Wi-Fi (802.11 b/g/n), Bluetooth 5 LE USB Type-C, native USB-CDC (no bridge) GPIO 15 exposed (some reserved for flash) Onboard WS2812 RGB LED (GPIO10), BOOT & RESET buttons Power Via USB-C or 5 V castellated pad (supports ~3.7–6 V per docs) Regulator ME6217 3.3 V LDO (up to ~800 mA) Antenna Onboard ceramic Variants Zero (no headers) • Zero-M (pre-soldered headers) What’s in the Pack 1× ESP32-C3 Zero (choose: Zero / Zero-M)
