The ESP32-C3 SuperMini Development Board is an ultra-compact, high-performance IoT platform built around Espressif’s ESP32-C3 RISC-V microcontroller. Designed for space-constrained applications, this board packs WiFi, Bluetooth 5.0, and a capable 32-bit processor into a thumb-sized form factor measuring just 22.5 × 18 mm — small enough to embed into wearables, sensor nodes, and portable devices where traditional development boards simply won’t fit .
At its core is a 32-bit RISC-V single-core processor running at up to 160 MHz, featuring a Floating Point Unit (FPU) for efficient 32-bit single-precision calculations . The chip includes 400 KB SRAM, 384 KB ROM, and 4 MB of onboard Flash for program and data storage . This RISC-V architecture provides a modern, efficient alternative to traditional ARM-based microcontrollers, with strong performance and low power consumption.
The board supports WiFi 802.11 b/g/n on the 2.4 GHz band and Bluetooth 5.0 (LE), enabling versatile wireless connectivity for IoT applications . It supports Station mode, SoftAP mode, SoftAP+Station mode, and promiscuous mode for flexible network configurations . The deep sleep current is approximately 43 µA, making it exceptionally well-suited for battery-powered and energy-conscious applications where extended operational life is essential .
The “Unsoldered” designation means the board ships without pin headers attached, giving you the flexibility to choose your connection method. You can solder headers for breadboard use, or leverage the board’s castellated holes to solder it directly onto a carrier PCB for a low-profile, permanent installation . This makes the SuperMini ideal for both prototyping and production integration.
The board exposes 11 digital I/O pins (all PWM-capable) and 4 analog input pins (ADC-capable), along with UART, I2C, and SPI interfaces for connecting sensors, displays, and peripherals . A USB Type-C connector handles power and programming, and the board includes a reset button and a BOOT button for entering download mode . An onboard blue LED on GPIO8 provides visual feedback for testing and debugging .
The ESP32-C3 SuperMini is supported by the Arduino IDE, ESP-IDF, and MicroPython, with extensive community libraries and examples available. Whether you are building a smart home sensor, a wearable device, a wireless controller, or a compact IoT gateway, this board provides a powerful, cost-effective foundation in an exceptionally small package. It is suitable for individual makers, students, and businesses purchasing in bulk for product development or educational programs .
Features
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ESP32-C3 RISC-V single-core processor — 32-bit architecture at up to 160 MHz with FPU for efficient computation
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Ultra-compact form factor — Thumb-sized at 22.5 × 18 mm, ideal for wearables and space-constrained designs
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WiFi & Bluetooth 5.0 — 802.11 b/g/n and BLE 5.0 for versatile wireless connectivity
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4MB onboard Flash — Sufficient storage for programs and data
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Ultra-low power consumption — Deep sleep current approximately 43 µA for battery-powered applications
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Castellated holes & unsoldered headers — Flexible mounting options for prototyping or direct PCB soldering
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Rich I/O interface — 11 PWM-capable GPIOs, 4 ADC inputs, 1× I2C, 1× SPI, 2× UART
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USB Type-C connector — Modern, reversible connector for power and programming
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Onboard LED & buttons — Blue LED on GPIO8, plus reset and BOOT buttons for easy operation
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Wide development support — Arduino IDE, ESP-IDF, and MicroPython compatible
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Microcontroller | ESP32-C3FN4 (32-bit RISC-V single-core) |
| 2 | Clock Speed | Up to 160 MHz |
| 3 | Flash / SRAM / ROM | 4 MB Flash / 400 KB SRAM / 384 KB ROM |
| 4 | Wireless | WiFi 802.11 b/g/n (2.4 GHz), Bluetooth 5.0 (LE) |
| 5 | GPIO / ADC | 11 digital I/O (PWM), 4 analog inputs (ADC) |
| 6 | Operating Voltage | 3.3V logic; 5V via USB-C or 3.3–6V external |
| 7 | Deep Sleep Current | Approximately 43 µA |
| 8 | Dimensions | 22.5 × 18 mm |
