SparkFun Qwiic OpenLog Kit

Item number 59280 Brand Sparkfun Model KIT-18350 Share Write a review
SparkFun Qwiic OpenLog Kit

Description Attachments

The SparkFun Qwiic OpenLog Kit is a comprehensive package that includes everything necessary to seamlessly integrate with the Qwiic Ecosystem. The kit comprises a SparkFun RedBoard Qwiic, a Qwiic Mux, a reversible USB A to micro-B cable, a 32GB microSD card, and the requisite Qwiic cables for easy assembly.

The Qwiic OpenLog is a powerful tool designed to store vast amounts of serial data, acting as a black box for your project. It is perfect for recording data for scientific or debugging purposes. With the Qwiic system, the OpenLog can be connected to the rest of your system without any soldering. However, for those who prefer using a breadboard, 2.54mm-spaced pins are also available.

The Qwiic OpenLog supports clock stretching and can record data up to 20,000 bytes per second at 400kHz. As the receive buffer fills up, the OpenLog will hold the clock line, letting the master know that it is busy. Once the Qwiic OpenLog finishes a task, it releases the clock, allowing the data to continue flowing without corruption.

The SparkFun RedBoard Qwiic is a versatile Arduino-compatible development board that can be programmed over a USB Micro-B cable using the Arduino IDE. It comes with 20 Digital I/O pins with 6 PWM pins, UART, SPI, and external interrupts. Additionally, the SDA, SCL, and IOREF pins that appeared on the UNO R3 are also broken out, ensuring compatibility with future shields. The RedBoard Qwiic can be powered over USB or through the barrel jack, and the on-board power regulator can handle anything from 7 to 15VDC.

The Qwiic Mux Breakout is a useful component that enables communication with multiple I2C devices that have the same address. It has eight configurable addresses of its own, allowing for up to 64 I2C buses on a connection. All communication is enacted exclusively via I2C, making the most of the Qwiic system.

The SparkFun Qwiic Connect System is an ecosystem of I2C sensors, actuators, shields, and cables that simplify prototyping and reduce errors. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector, which minimizes required PCB space, and polarized connections ensure correct hook-up every time.

Kit Includes:

  • 1x SparkFun Qwiic OpenLog
  • 1x SparkFun RedBoard Qwiic
  • 1x SparkFun Qwiic Mux Breakout - 8 Channel (TCA9548A)
  • 1x Reversible USB A to Reversible Micro-B Cable - 0.8m
  • 1x Flexible Qwiic Cable - 50mm
  • 1x Flexible Qwiic Cable - 100mm
  • 1x microSD Card with Adapter - 32GB (Class 10)


  • Qwiic OpenLog: Schematic, Eagle Files, Hookup Guide, Arduino Library, GitHub
  • RedBoard Qwiic: Schematic, Eagle Files, SparkFun RedBoard Qwiic Hookup Guide, How to Install CH340C Drivers, Arduino Buying Guide, Arduino IDE Download, Qwiic Page, GitHub
  • Qwiic Mux: Schematic (v1.1), Eagle Files (v1.1), Hookup Guide, Board Dimensions (v1.1), TCA9548A Datasheet (TCA9548A), SparkFun I2C Mux Arduino Library, SparkFun TCA9548A Python Package, ReadtheDocs Documentation, Qwiic Resource Page, GitHub Hardware Repository (v1.1)


Brand information
Brand Sparkfun
More infoQwiic MUX Hookup Guide -
Size info
Length128 mm
Width180 mm
Height50 mm
Weight291,2 g
€ 91,50€ 75,60 Excl. VAT (NL)
Out of stock In stock with supplier
Delivered in 5 to 10 days
Shipped from € 5,95 (NL) 30 days cooling-off Excellent service

Customer questions

Customer Reviews

SparkFun Qwiic OpenLog Kit Click a star to leave your review

Recently viewed items

Webwinkelkeur Kiyoh Trustpilot Opencircuit