HVS-4667. Blood Group Detection using Fingerprint on Raspberry pi.

hvsadmin — Mon, 13 Apr 2026 08:49:37 +0000

This project presents a biometric-based blood group identification system using a Raspberry Pi Zero 2W and an R307 fingerprint sensor. The system links registered fingerprints with corresponding blood group information stored in a database. When a user places their finger on the sensor, the system verifies the fingerprint and displays the associated blood group on an LCD via I2C communication. If an unregistered or incorrect fingerprint is detected, a buzzer alert is activated. The system also includes a web-based interface for fingerprint registration and blood group data management over Wi-Fi. This solution can be used in emergency medical situations for quick identification of blood groups.

The objectives of the project include:

To interface R307 fingerprint module with Raspberry Pi.
To store fingerprint templates with corresponding blood groups.
To display blood group information on LCD using I2C.
To generate buzzer alert for wrong fingerprint detection.
To develop a web page for registration and database management.
To enable Wi-Fi-based remote access.

The major building blocks of this project are:

Regulated power supply.
Raspberry pi zero 2w.
Fingerprint module.
LCD display.
Buzzer.
SD card.

Software’s used:

Raspbian OS.
WEB technology.
Express SCH for Circuit design.

video:

HVS-1419. Online Monitoring of Geological CO2 Storage and Leakage Based on Wireless Sensor Networks

hvsadmin — Sat, 22 Nov 2025 08:20:39 +0000

The project “Online Monitoring of Geological CO₂ Storage and Leakage Based on Wireless Sensor Networks” aims to develop an intelligent and reliable system for real-time detection and monitoring of CO₂ concentration in geological storage sites. The system utilizes a CO₂ sensor interfaced with a NodeMCU (ESP8266) microcontroller to continuously sense and record carbon dioxide levels. The data is displayed locally on an LCD module and simultaneously transmitted via Wi-Fi to an online web server for remote monitoring and analysis. A regulated power supply ensures stable operation of all components. This wireless monitoring approach enables early detection of CO₂ leakage, ensuring environmental safety and efficient management of underground carbon storage facilities. The proposed system reduces the need for manual inspection, enhances data accessibility, and contributes to sustainable carbon capture and storage (CCS) practices.

Objectives:

 To monitor CO₂ levels in geological storage sites in real-time.

 To design a low-cost and energy-efficient monitoring system using IoT technology.

 To provide early detection of potential CO₂ leakage.

 To ensure environmental and human safety by preventing hazardous exposure.

 To enable remote data access and analysis via a web-based interface.

 To minimize manual inspection and enhance automation in CO₂ monitoring.

Keywords:

NodeMCU Microcontroller.
Co₂sensor.
LCD display.
Power supply.

Software’s used:

Arduino IDE for compiling and dumping code into Microcontroller
Express SCH for Circuit design.
WEB technology.

Regulated Power Supply:

Block diagram:

video:

WEB – HVS Technologies

HVS-4667. Blood Group Detection using Fingerprint on Raspberry pi.

HVS-1419. Online Monitoring of Geological CO2 Storage and Leakage Based on Wireless Sensor Networks