SparkFun Pro Micro – ESP32-C3 Features a Qwiic Connector

SparkFun Pro Micro – ESP32-C3 Features a Qwiic Connector


SparkFun has recently announced the “SparkFun Pro Micro – ESP32-C3” board, an ESP32-C3-based development board featuring SparkFun’s Qwiic Connect System. This compact board includes Wi-Fi, Bluetooth, GPIO, SPI, UART, I2C, I2S, and all the necessary hardware required for advanced IoT and embedded applications.

Previously we have covered many ESP32-C3-based development boards like the Wemos Lolin C3 Pico, Olimex ESP32-C3-DevKit-LiPo, Lilygo T-Zigbee with ESP32-C3, Adafruit QT Py ESP32-C3 and many other ESP32-C3 powered development board, feel free to check those out if you are interested in the ESP32-C3 module.

The Pro Micro ESP32-C3 features a RISC-V core, 400KB of SRAM, and runs at 160MHz, all integrated into a compact 1.3in. x 0.7in. board. It features an easy Qwiic connection, built-in WiFi, Bluetooth 5, and 22 GPIOs, supporting ADC, SPI, UART, and I2C, perfect for a wide range of projects.

 SparkFun Pro Micro – ESP32-C3 Board Specifications:

  • CPU and On ­Chip Memory
    • ESP32-C3FH4 embedded,32-bit RISC-V single-core processor, up to 160MHz
    • 384 KB ROM
    • 400 KB SRAM (16 KB for cache)
    • 8 KB SRAM in RTC
    • 4 MB flash in a chip package
  • Wi­Fi
    • 802.11b/g/n
    • Center frequency range of operating channel:2412~2484 MHz
    • Supports 20 MHz, 40 MHz bandwidth in 2.4 GHz band
    • 1T1R mode with data rate up to 150 Mbps
    • Wi-Fi Multimedia (WMM)
    • Immediate Block ACK
    • Fragmentation and defragmentation
  • Bluetooth
    • Bluetooth LE: Bluetooth 5, Bluetooth mesh
    • Speed: 125 Kbps, 500 Kbps, 1 Mbps, 2 Mbps
    • Channel selection algorithm #2
    • Internal co-existence mechanism between Wi-Fiand Bluetooth to share the same antenna
  • Peripherals
    • GPIO, SPI, UART, I2C, I2S, remote control peripheral, LED PWM controller, general DMA controller, TWAI®controller (compatible with ISO11898-1, i.e. CAN Specification 2.0), USBSerial/JTAG controller, temperature sensor, SARADC, general-purpose timers, watchdog timers
  • Integrated Components on Module
    • 40 MHz crystal oscillator
  • Antenna Options
    • On-board PCB antenna (ESP32-C3-MINI-1)
  • Operating Conditions
    • Operating voltage/Power supply: 3.0 ~ 3.6 V
    • Operating ambient temperature: –40 ~ 85 °C
  • 1x Vertical Qwiic Connector

The SparkFun Pro Micro ESP32-C3 supports Espressif’s ESP-IDF and Arduino IDE, offering a wealth of libraries and community support for diverse projects. Ideal for wearables, and IoT devices.

For the Pro Micro ESP32-C3, SparkFun offers resources, all accessible through their GitHub repository. This includes the schematic, Eagle files, board dimensions, a hookup guide, the ESP32-C3FN4 datasheet, a reference manual, information on the Qwiic system, and much more.

The product is available for purchase at $9.95 on the SparkFun store.

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About Debashis Das

Tech Content Creator | Hardware Design Engineer | IoT Enthusiast | Digital Storyteller | Video Creator | From crafting digital dialogues at Semicon Media to orchestrating online engagement at, my journey is about making tech talk interesting and accessible. In the quiet corners of the day, I advocate for easier tech education, one tutorial at a time. Let's connect and keep the digital dialogue going!

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