Specifications:
- 32-bit RISC-V single-core processor, up to 160MHz
- 4 MB integrated SPI Flash memory
- 384 KB ROM, 400 KB SRAM (16 KB for cache), 8 KB SRAM in RTC
- IEEE 802.11 b/g/n-compliant
- Bluetooth LE: Bluetooth 5, Bluetooth mesh
- 3x SPI, 2x UART, 1x I2C, 1x I2S
- LED PWM controller (with up to 6 channels), full-speed USB Serial/JTAG controller, general DMA controller
- 2x 12-bit SAR ADCs, up to 6 channels
- in Arduino IDE, choose "ESP32C3 Dev Module"
Pinout and tech specs
Datasheet (PDF)