Imported from GitHub: neuesfliegen-ev/DataLogger · commit 4b7ba02

Description

🛩️ Flight Data Logger

README

🛩️ Flight Data Logger

This project is a Flight Data Logger designed for UAVs and model aircrafts. It logs sensor and GPS data at 1 Hz to an SD card in CSV format. The system uses various sensors including an IMU, barometric sensor, and GPS module, and displays live status updates on an OLED screen.

📦 Features

• Logs data to SD card in .csv format
• Captures:
  • 9-axis IMU data (acceleration, gyroscope, magnetometer)
  • Barometric pressure, altitude, and temperature
  • GPS coordinates, altitude, speed, and satellite count
• OLED display for live status updates
• Live telemetry Using 3G SIM card
• Modular and extensible design for future sensor integration

🧠 Core Components

Component	Description
Arduino	Primary microcontroller (Nano Ble 33 Sense REV2)
BMI270_BMM150	9-DOF IMU (acceleration, gyroscope, magnetometer)
LPS22HB	Barometric pressure sensor
TinyGPS++	GPS data parser
SH1106 OLED	I2C 128x64 screen for live feedback
SD Card Module	Stores .csv data logs
Voltage Divider	Scales down battery voltage for safe ADC reading

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🔧 Circuit Diagram

needs to replace resistor 430 with 510 ohms

Wiring diagram

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🔋 ADC Voltage Divider

To safely read battery voltage levels using the Arduino's 3.3V ADC pin, use the following voltage divider:

• Input Voltage: Up to 4.2V (LiPo 1S max)
• Divider Resistors:
  • R1: 1.8kΩ
  • R2: 510

📐 Voltage Divider Calculation

Vout = Vin × (1 - (R2 / (R1 + R2)) = 4.2 × (1- (510 / (1800 + 510)) ≈ 3.272V

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📂 Data Format

Logged data is stored as a CSV file (log.csv) with the following headers:

timestamp,accX,accY,accZ,gyroX,gyroY,gyroZ,magX,magY,magZ, latitude,longitude,gpsAltitude,Speed,SatCount,roll,pitch,yaw, pressure,temperature,paltitude

Example row: 1542,-0.01,0.02,9.81,0.01,-0.02,0.00,30.12,11.23,-45.66, 52.5200,13.4050,120.5,10.4,9,0,0,0,100.3,25.5,132.2

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🛠️ Getting Started

🔌 Wiring

• Connect sensors and modules via I2C/SPI/Serial as per the diagram.
• Ensure GPS is connected to Serial1 (typically TX/RX on Arduino). (IMPORTANT)
• Insert a formatted FAT32 SD card.

🧪 Uploading

1. Install dependencies:
   • Arduino_BMI270_BMM150
   • Arduino_LPS22HB
   • TinyGPSPlus
   • U8g2
2. Compile and upload the sketch to your board.
3. Open the Serial Monitor at 115200 baud to see real-time debug info.

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📊 OLED Display

The OLED shows system status:

• Sensor initialization
• GPS satellites count
• Errors during SD or sensor setup
• Team number

To keep the display clear and reduce power, update messages are brief and limited to startup and GPS updates.

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🧩 Planned Improvements

• Add orientation calculation (roll, pitch, yaw)
• Support logging at configurable rates (5Hz, 10Hz)
• Add battery voltage and current sensors
• Add SIM card for real time telemetry

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👨‍💻 Credits

• Developed by Neus Fliegen Avionics Team
• Based on libraries by Arduino, Adafruit, and Mikal Hart (TinyGPS++)

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📷 License

• Not for Comercial Stuf

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