Fermion: Serial Data Logger V2.0 for Arduino

The Fermion: Serial Data Logger V2.0 is a compact data recording module designed for long-term environmental logging, robotics diagnostics, and standalone data capture. It allows microcontrollers to store data directly via serial communication without complex SD card libraries, and connects straight to a computer via USB for quick file access. This makes it an ideal tool for students, makers, and engineers debugging projects in the lab or field.

Direct serial logging and USB access

The module records data streams directly through standard serial communication across multiple baud rates without extra driver code. An onboard USB 2.0 interface enables you to connect the logger directly to a PC to read stored logs without needing an external card reader.

System connection overview

Integrating easily with Arduino and other microcontrollers, the logger operates on a 3.3V to 5V supply with an operating current of just 10mA. It is well suited for offline data collection and monitoring systems.

Board pinout and status indicator

The board features a dedicated SAVE pin that lets you segment and store data into separate files easily. An integrated LED indicator provides real-time visual feedback during data writing operations.

Flexible file formats and storage

Version 2.0 introduces support for both TXT and CSV formats alongside scheduled file creation for organised data collection. The FAT32 file system supports TF memory cards up to 32GB, backed by improved startup times and runtime stability.

Compact footprint and environmental tolerance

With dimensions of only 23 x 29mm, the board fits easily into space-constrained drone and robotics projects. It is rated for operation across temperatures from -20°C to 65°C and relative humidity levels from 5%RH to 85%RH.

Package contents

Each pack includes one Fermion: Serial Data Logger V2.0 board and one 2.54mm 10-pin single-row male header for prototyping.

Downloads & documentation

• Product wiki (DFRobot)