The ESP32-C3 Mini (also known as the ESP32-C3 Super Mini) is an ultra-compact development board built around the Espressif ESP32-C3 microcontroller. Featuring a 32-bit RISC-V single-core processor running at 160 MHz, built-in Wi-Fi and Bluetooth 5.0 (BLE), and a tiny thumb-sized footprint, this board packs serious capability into a remarkably small package. It is ideal for IoT projects, home automation, wearable electronics, sensor nodes, and rapid prototyping where space is at a premium.

The board is breadboard-friendly with standard 2.54 mm pin spacing and features a USB-C connector for programming and power. It is compatible with both the Arduino IDE and the ESP-IDF framework, making it accessible to beginners and experienced developers alike.

Key Features

• 32-bit RISC-V single-core processor at 160 MHz
• 4 MB flash memory (built-in on ESP32-C3FH4 variant)
• 400 KB SRAM
• Wi-Fi 802.11 b/g/n (2.4 GHz)
• Bluetooth 5.0 (BLE)
• 11 programmable GPIO pins
• 6 x 12-bit ADC channels
• PWM support on all GPIO pins
• UART, I2C, and SPI interfaces
• USB-C connector (native USB — no external UART chip)
• Deep sleep current approximately 43 μA
• On-board PCB antenna
• Reset and Boot buttons
• Blue user LED (GPIO8) and red power LED
• Dimensions: approximately 22.5 mm x 18 mm

Operating Voltage

• Logic level: 3.3V
• Power input: 5V via USB-C

Common Applications

• IoT sensor nodes (temperature, humidity, air quality, etc.)
• Home automation with ESPHome or Home Assistant
• Battery-powered wireless sensors and data loggers
• Wearable and portable electronics
• RS485/Modbus network nodes (with external transceiver)
• Rapid prototyping and education
• MQTT-based monitoring and control systems

Important Note on Flash Variants

Some lower-cost ESP32-C3 Super Mini boards have been found to ship without external flash memory, relying only on internal ROM. Always verify that your board uses the ESP32-C3FH4 chip variant, which includes 4 MB of built-in flash for programme storage.

Datasheet

Note: The accuracy of the data in the link provided cannot be guaranteed. If information is in any way critical it is recommended that a sample quantity is ordered initially.

• ESP32-C3 SoC Datasheet (PDF) — Espressif
• ESP32-C3-MINI-1 Module Datasheet (PDF) — Espressif

Useful Resources

• Getting Started with the ESP32-C3 Super Mini — Random Nerd Tutorials
• ESP32-C3 Super Mini Pinout and Specifications — espboards.dev

YouTube Links

Note: The links provided are not always for the exact same product but will hopefully provide some insight and/or more information about the subject.

• Search: ESP32-C3 Super Mini — Getting Started Tutorials
• DroneBot Workshop — ESP32 Selection Guide
• Andreas Spiess — ESP32-C3 Reviews and Comparisons
• Random Nerd Tutorials — ESP32-C3 Super Mini