Beetle ESP32-C3 RISC-V Core Development Board

The Beetle ESP32-C3 from DFRobot is a mini board measuring 25 × 20.5 mm. The ESP32-C3 has a RISC-V core at 160 MHz, 400 KB SRAM and 4 MB flash, plus 2.4 GHz Wi-Fi and Bluetooth 5 (LE). A TP4057 charging circuit for a lithium battery sits on the board, charging is done via USB-C with up to 400 mA. An expansion board with more solder pads for the power supply and a GDI connector for DFRobot displays is included. It is programmed with Arduino IDE, ESP-IDF or MicroPython.

Recommended Accessories:

Features:

ESP32-C3, RISC-V, single core at 160 MHz
Wi-Fi 802.11 b/g/n and Bluetooth 5 (LE), Bluetooth Mesh and Espressif Wi-Fi Mesh
13 digital IO, up to 6 ADC channels with 12 bit, pin functions multiplexed
TP4057 charging circuit, charge LED: off when full or without power, on while charging, blinking without battery
BOOT (IO9) and RST buttons from version V2.0.0, LED on IO10
Expansion board with GDI connector (18-pin, FPC)
USB-C with USB CDC for programming

Application Examples:

Small IoT devices and wearables
Smart home sensors with Wi-Fi or Bluetooth
Small displays via GDI

Documentation:

Technical Data:

Manufacturer: DFRobot
Manufacturer SKU: DFR0868
Processor: RISC-V 32 bit, single core
Clock frequency: 160 MHz
SRAM: 400 KB
ROM: 384 KB
Flash: 4 MB
RTC SRAM: 8 KB
Wi-Fi: IEEE 802.11 b/g/n, 2.4 GHz, 20 and 40 MHz
Bluetooth: 5, Mesh, 125 kbit/s to 2 Mbit/s
Operating voltage: 3.3 V
Input USB-C and VIN: 5 V DC
Operating current: 25 mA
Charging current: up to 400 mA
Interfaces: 13 × digital, 6 × ADC, 1 × SPI, 2 × UART, 1 × I2C, 1 × I2S, 6 × LED PWM, IR transmitter and receiver
Operating temperature: -40 to 105 °C according to the product page, the wiki states -10 to 60 °C
Dimensions: 25 × 20.5 mm
Weight: 10.5 g