ESP32-C3 Super Mini Development Board HW-466AB

ESP32-C3 Super Mini Development Board HW-466AB is an ultra-compact, high-performance microcontroller board designed specifically for modern IoT applications that require both power efficiency and wireless versatility. This board utilizes the ESP32-C3FH4 SoC, which features a single-core RISC-V 32-bit processor capable of operating at speeds up to 160 MHz. Consequently, it provides a robust balance between processing power and low energy consumption, making it ideal for battery-powered wearable devices and remote sensors. The integrated support for 2.4 GHz Wi-Fi and Bluetooth 5 (LE) ensures seamless connectivity in diverse networking environments. Furthermore, the “Super Mini” form factor allows developers to embed this board into extremely space-constrained enclosures without sacrificing functionality. Therefore, the HW-466AB stands out as a premier choice for hobbyists and professionals looking to leverage the RISC-V architecture in a highly portable package.

Key Features:

• RISC-V Architecture: Powered by a single-core 32-bit RISC-V processor, offering an open-source and highly efficient computing alternative to standard ARM cores.
• Dual Wireless Connectivity: Includes high-speed 2.4 GHz Wi-Fi and Bluetooth 5 (LE) with long-range support to ensure stable communication over varying distances.
• Ultra-Compact Design: The tiny footprint makes it one of the smallest ESP32 development boards available, perfect for discrete or wearable projects.
• Rich Peripheral Set: Features 13 GPIOs, ADC, SPI, UART, and I2C interfaces despite its miniature size, allowing for versatile sensor integration.
• USB-C Interface: Incorporates a modern USB Type-C connector for both power and serial programming, simplifying the development workflow.

Technical Specifications:

• CPU: ESP32-C3FH4 RISC-V 32-bit single-core processor
• Clock Frequency: Up to 160 MHz
• SRAM: 400 KB
• Flash Memory: 4 MB (Integrated)
• Operating Voltage: 3.3 V to 5 V (via USB-C or VCC pin)
• Operating Current: Average 80 mA (under active Wi-Fi transmission)
• Low Power Consumption: Deep sleep current as low as ≈ 5 µA
• Wi-Fi Protocol: IEEE 802.11 b/g/n-compliant
• Bluetooth Protocol: Bluetooth 5, Bluetooth mesh

Mechanical Specifications:

• PCB Material: High-quality FR-4 with immersion gold finish for improved durability and conductivity.
• Mounting: Through-hole headers (2.54 mm pitch) and castellated holes for direct SMD soldering.
• Antenna: On-board ceramic antenna for reliable signal reception without external components.
• Weight: ≈ 2.2 g

Dimensions:

• Length: 22.5 mm
• Width: 18.0 mm
• Height: ≈ 4.5 mm (including USB-C connector)
• Pin Pitch: Standard 2.54 mm (0.1 inch)

Pinout and Wiring:

• VCC (5V): Power input pin. Connect to a regulated 5 V source if not using the USB-C port.
• GND: Common ground pin for the entire circuit.
• 3V3: Regulated 3.3 V output for powering external low-power sensors.
• GPIO0 to GPIO10: General-purpose input/output pins. Note that GPIO9 is often used as a boot strapping pin.
• RX/TX: Dedicated UART pins for serial communication and debugging.
• Boot Button: Press and hold while powering on or resetting to enter firmware download mode.

Datasheet Reference:

• Download Espressif ESP32-C3 Series Datasheet

Commonly Used in:

• Wearable Technology: Small-scale fitness trackers or smart apparel due to its minimal weight and size.
• Smart Home Nodes: Hidden sensors for temperature, humidity, or motion that require Wi-Fi connectivity.
• Battery-Operated Devices: Low-power remote data loggers that transmit data periodically via Bluetooth LE.

Applications:

• IoT Prototyping: Rapidly testing RISC-V based code for internet-connected appliances.
• Wireless Control: Building custom remote controls or wireless triggers for cameras and industrial hardware.
• Educational Tools: Teaching modern 32-bit architecture and wireless protocol stacks in computer science courses.

Equivalent Models:

• Seeed Studio XIAO ESP32C3: A very similar small-form-factor board with a comparable pinout and USB-C.
• Adafruit QT Py ESP32-C3: Another high-quality alternative that focuses on the Stemma QT ecosystem for easy sensor connection.
• ESP32-C3-DevKitM-1: The official development kit from Espressif, however, it features a much larger footprint than the Super Mini version.

Package Includes:

• 1 x ESP32-C3 Super Mini Development Board (HW-466AB)
• 2 x 7-Pin Male Header Strips (Unsoldered)