SD Card Data Logger Kit with Arduino Uno & DHT22: Log Temperature, Humidity, and Light with Excel-Ready Timestamps

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

For science fair projects, agricultural field tests, or indoor climate monitoring, this kit turns an Arduino Uno into a standalone data logger. The high-accuracy DHT22 captures temperature and humidity, while two LDRs track ambient light. A DS3231 real-time clock stamps every reading to the second, and the Arduino writes the dataset to a microSD card as a clean CSV file — ready for Excel or Google Sheets the moment you transfer the card to your laptop.

What You'll Build

You’ll assemble a complete environmental logger that records readings every minute onto a removable SD card. Place it in a greenhouse to study temperature-humidity patterns, set it in a classroom to monitor light levels across the day, or run it overnight in your lab to collect data for a CBSE investigatory project. When you’re done, pull the card, open the CSV, and immediately create graphs and pivot tables without any file conversion.

What You'll Learn

• Interface the DHT22 digital sensor with Arduino and extract precise temperature and relative humidity values.
• Connect a DS3231 real-time clock module to tag each log entry with true date and time.
• Write Arduino code to format sensor data as comma-separated records and store them on a FAT-formatted SD card.
• Set configurable logging intervals, handle file creation, and manage CSV headers for spreadsheet software compatibility.

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

CBSE Class 11–12 students who need a reliable data logging project for physics or computer science practicals. First- and second-year B.Tech ECE/EEE students building mini projects or participating in Smart India Hackathon and ATL Tinkering Lab challenges. Anyone at IIT, NIT, VIT, or BITS looking to quickly stand up an environmental monitor without hunting for compatible modules. The intermediate level assumes basic Arduino familiarity, but the AI companion guides first-timers through every connection and code block.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.