ESP32-C3 Development Board, SuperMini WiFi Bluetooth Core Board, Soldered/Unsoldered/Expansion Options for Arduino IoT Projects

$7.64 USD

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ESP32-C3 SuperMini Development Board — WiFi + Bluetooth 5.0, RISC-V, Arduino & IoT

The ESP32-C3 SuperMini is an ultra-compact development board built around Espressif's ESP32-C3 SoC — a single-core 32-bit RISC-V processor running at up to 160MHz with integrated 2.4GHz WiFi (802.11 b/g/n) and Bluetooth 5.0 (BLE). At just 22.5mm × 18mm, it is one of the smallest ESP32-C3 form factors available, making it ideal for space-constrained IoT sensor nodes, wearables, and embedded wireless projects. Available in soldered (pre-soldered headers), unsoldered (bare board), and expansion board options.

Technical Specifications

Parameter	Value
SoC	Espressif ESP32-C3 (single-core 32-bit RISC-V)
CPU Speed	Up to 160MHz
Flash Memory	4MB SPI NOR Flash (built-in)
SRAM	400KB (384KB data + 16KB instruction cache)
WiFi	802.11 b/g/n, 2.4GHz, up to 150Mbps
Bluetooth	BLE 5.0 + Bluetooth Mesh
GPIO Pins	11 (multipurpose: ADC, SPI, I²C, UART, PWM)
ADC	2 × 12-bit SAR ADC, up to 6 channels
USB	USB Type-C (USB Serial/JTAG controller built-in)
Operating Voltage	3.3V (onboard LDO from 5V USB)
Operating Temperature	−40°C to +85°C
Board Dimensions	22.5mm × 18mm
Weight	~2.3g
Package	SOP (castellated edges for SMD soldering)

Variant Options

Soldered: Pre-soldered pin headers — plug directly into a breadboard or perfboard for rapid prototyping
Unsoldered: Bare board with castellated edges — solder directly onto a custom PCB as a module
Expansion Board: Mounted on a breakout board with additional power regulation, USB hub, or sensor headers

Programming & Compatibility

Arduino IDE: Fully supported via ESP32 Arduino Core (espressif/arduino-esp32 v2.x+). Select "ESP32C3 Dev Module" in Board Manager.
MicroPython: Official MicroPython firmware available for ESP32-C3. Flash via esptool.py.
ESP-IDF: Native Espressif IoT Development Framework support for production firmware development
PlatformIO: Supported with espressif32 platform, board ID: esp32-c3-devkitm-1
Download Mode: Hold BOOT button while pressing RESET to enter download mode for firmware flashing

Typical Applications

IoT Sensor Nodes: WiFi-connected temperature, humidity, CO₂, and air quality sensors with MQTT or HTTP data reporting to Home Assistant, AWS IoT, or Azure IoT Hub
BLE Peripherals: Bluetooth Low Energy HID devices (keyboards, mice), BLE beacons, and proximity sensors
Smart Home Devices: ESP-NOW mesh networks, Matter-over-WiFi devices, and Zigbee bridge nodes
Wearables & Compact Projects: Ultra-small form factor for wearable electronics, badge projects, and miniature wireless controllers
OTA Update Systems: Over-the-air firmware update capable via WiFi — ideal for deployed field devices
Edge AI / TinyML: Lightweight inference for keyword spotting and anomaly detection using TensorFlow Lite Micro on RISC-V

FAQ

Q: Is the ESP32-C3 SuperMini compatible with ESP32 Arduino libraries?
A: Most ESP32 Arduino libraries are compatible. However, the ESP32-C3 uses a RISC-V core (not Xtensa), so libraries that include Xtensa-specific assembly code may require updates. The official espressif/arduino-esp32 core v2.x+ fully supports ESP32-C3.

Q: Does the ESP32-C3 support Bluetooth Classic?
A: No. The ESP32-C3 supports BLE 5.0 only. It does not support Bluetooth Classic (BR/EDR). For Bluetooth Classic, use the ESP32 (original) or ESP32-A2DP-capable variants.

Q: How do I enter download mode to flash firmware?
A: Hold the BOOT (IO9) button, press and release RESET, then release BOOT. The board will enter download mode and appear as a USB serial device for esptool.py or Arduino IDE flashing.