Espressif ESP32-C3

ESP32-C3 is pin-compatible with ESP8266. It has a single core RISC-V 32-bit CPU @160 MHz and includes 400 kB of SRAM and 384 kB of flash built-in.

See the reference side-by-side comparison ESP8266 vs ESP32 vs ESP32-S2 vs ESP32-C3

	ESP32-C3
Website	https://www.espressif.com/en/products/socs/esp32-c3
Release date	2020
Product details
CPU	RISC-V 32-bit Single-Core @ 160 MHz
Coprocessor
RAM	400 KB
ROM	384 KB
UART	2
SPI	Yes 3
Wi-Fi	Yes 802.11b/g/n
Bluetooth®	Yes 5.0 + BLE
USB Host	No
Ethernet (LAN, RJ45)	No
RTC Memory	8 KB
External SPIRAM
External Flash
ESP-MESH	Yes
CAN
GPIO	22 (up to)
Hall effect sensor	No
Temperature sensor	Yes
Touch sensors
I²C	Yes up to 1
I2S	1
ADC	Yes 2 × 12-bit SAR ADCs, up to 6 channels
DAC
PWM	Yes up to 6
SDMMC
RMT (remote control)
LCD Interface	No
Camera Interface	No
Secure flash	4096-bit OTP
Cryptography support	AES-128/256, RSA Accelerator, SHA Accelerator, Random Number Generator (RNG), HMAC
Deep sleep consumption
Dimensions
Height	5 mm
Width	5 mm