The ESP32-C3-Pro Mini Development Board is a high-performance, ultra-compact IoT platform built around Espressif’s ESP32-C3 RISC-V microcontroller. It combines WiFi, Bluetooth 5.0, and a capable 32-bit processor into a thumb-sized form factor measuring just 22.52 × 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 integrates 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 excellent power efficiency.
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 mixed 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 “Soldered” designation means the board ships with pin headers already soldered in place, ready for immediate use in breadboard prototyping or jumper-wire connections. Simply plug it into a breadboard and start building — no soldering equipment required. The board also features castellated holes, allowing it to be soldered directly onto a carrier PCB for a low-profile, permanent installation if desired .
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. An onboard blue LED on GPIO8 provides visual feedback for testing and debugging, and the board includes a reset button and a BOOT button for entering download mode .
The ESP32-C3-Pro Mini 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 22.52 × 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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Pre-soldered pin headers — Ready to use in breadboard prototyping without soldering
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Castellated holes — Also supports direct PCB soldering for low-profile permanent installations
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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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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 | 22.52 × 18 mm |
