RootDataLogger – Data Logging System for Root Pull-Out Tests

RootDataLogger is a data logging system designed for measuring root displacement under applied force. It is used in root pull-out experiments to study root mechanical properties and their role in soil stabilization.

The system uses a LoadCell (HX711) to apply force and a Wire Sensor to measure root displacement. Measurement data is recorded on an SD card, and real-time transmission via Bluetooth (HC-05) enables remote monitoring. Additionally, the system includes basic calibration and diagnostic tools to improve measurement accuracy.

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Project Structure

RootDataLogger/

│── Code/              # Main firmware for the logger
│   ├── Logger_I/      # Code for Logger I
│   ├── Logger_II/     # Code for Logger II
│
│── Docs/              # Documentation, manuals, schematics, sensor details
│   ├── inventory.md   # List of sensors & hardware used
│   ├── Images/        # Photos
│   ├── Manuals/       # User guide
│   ├── Schematics/    # Circuit diagram
│   ├── SensorInfo/    # Sensor-related documentation
│       ├── LoadCell_Wiring.txt
│       ├── WirePotentiometer_Wiring.txt
│
│── Scripts/           # Helper scripts for data analysis & processing
│    ├── Plots         # Example plots of a measurement
│    ├── sensor-data-visualizer.py      # Converts SD logs into CSV/JSON
│
│── Tests/             # Calibration & functional tests
│   ├── test_loadcell.ino      # LoadCell test & calibration
│   ├── test_rtc.ino           # RTC reset & verification
│   ├── test_wire_sensor.ino   # Wire Sensor functionality test

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Features

Root Pull-Out Testing – Measures root displacement under applied force
LoadCell (HX711) Integration – Records applied force values
Wire Sensor Support – Captures displacement of roots
SD Card Logging – Saves measurements in .csv format
Real-Time Clock (RTC) – Adds timestamps to measurement data Bluetooth HC-05 – Enables remote data monitoring Basic Calibration Tools – Ensures accurate sensor readings

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Data Processing & Analysis

Recorded measurement logs can be processed using Python:

python scripts/sensor-data-visualizer.py

Alternatively, the data can be opened in Excel/Google Sheets for analysis.

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License & Contributions

This project is Open Source and intended for scientific research in root mechanics and soil stability. Contributions, bug reports, and feature suggestions are welcome.

Created by phiflip | HAFL – © 2025

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