Features
- Contactless Body Temperature Measurement: Uses an infrared sensor (MLX90614) to take safe, hygienic, and accurate temperature readings without physical contact.
- Automated Data Logging: Automatically uploads every reading to Google Sheets for instant data storage and visualization.
- Real-Time Updates: Displays live temperature readings and continuously updates the online database.
- Portable & Wireless: Powered by an ESP8266 with built-in Wi-Fi connectivity; can run via USB or battery.
- User-Friendly Interface: Data is easily accessible through Google Sheets, no separate app or dashboard required.
Components Used
- ESP8266 (Microcontroller)
- MLX90614, Contactless Infrared Temperature Sensor
- Google Sheets API (for IoT data integration and online logging)
- Jumper Wires (for connections between components)
- Power Supply (USB cable or battery pack)
- Buzzer
- Push Button
- OLED
How it Works
- The MLX90614 infrared sensor measures a person’s body temperature without physical contact.
- The ESP8266 collects these temperature readings and sends them via Wi-Fi to a Google Spreadsheet using the Google Sheets API.
- Each reading is automatically timestamped and stored, enabling users to analyze trends and temperature variations over time.
Working
The prototype was first tested on a breadboard to validate contactless temperature measurement and cloud data logging.
The final version was assembled into a handheld thermometer gun, offering automatic data logging and remote monitoring through Google Sheets, and even sending email alerts whenever a temperature reading exceeds a set threshold.
Code & Installation
The complete source code, circuit diagrams, and step-by-step installation instructions are available in the GitHub repository.
Prototype ,Files & Snaps
Circuit Diagram
Spreadsheet Readings
Emails Received
Snap
My Learnings
- Integrated Google Spreadsheet API for real-time cloud data logging
- Implemented automated email alerts using ESP8266
- Interfaced and calibrated an infrared temperature sensor for non-contact temperature measurement
