The Body Vitals Monitoring through Bluetooth project is a smart healthcare system designed to measure multiple body vital parameters and transmit the results wirelessly to a mobile phone. The system is built around an Arduino UNO microcontroller and incorporates an IR sensor for user detection, a digital blood pressure (BP) monitor, weight sensor, SR04 ultrasonic sensor for height measurement, MAX30100 sensor for heart rate and SpO₂ monitoring, and an MLX90614 infrared temperature sensor for non-contact body temperature measurement. An LCD is used to display the measured values locally, while a Bluetooth module provides wireless communication with a smartphone. When a user is detected by the IR sensor, the Arduino automatically sends a confirmation character to the mobile phone through Bluetooth, indicating that the system is ready for operation. The user then selects the required health parameter by sending a command from the mobile application: Button for Blood Pressure, W for Weight, H for Height, S for Heart Rate and SpO₂, and T for Body Temperature. Upon receiving the command, the Arduino activates the corresponding sensor, acquires the measurement, displays the result on the LCD, and transmits the data back to the mobile device. After each measurement, the system waits for the next command until all required parameters are recorded. This project provides a compact, user-friendly, and cost-effective solution for personal health monitoring. It enables quick and accurate measurement of multiple vital signs using a single device with Bluetooth connectivity, making it suitable for homes, hospitals, clinics, fitness centers, and community health camps. The system enhances healthcare accessibility by allowing users to monitor their health parameters conveniently and efficiently.          

The main objectives of this project are:  

  To develop Bluetooth-based body vitals monitoring system using an Arduino UNO.

  To detect the user's presence automatically using an IR sensor.

  To send a confirmation message/character to the user's mobile phone when the user is detected.

  To measure Blood Pressure (BP) on receiving the 'B' command from the mobile.

  To measure Weight on receiving the 'W' command.

  To measure Height using the ultrasonic sensor on receiving the 'H' command.

  To measure Heart Rate and SpO₂ using the MAX30100 sensor on receiving the 'S' command.

  To measure Body Temperature using the MLX90614 sensor on receiving the 'T' command.

  To display all measured parameters on an LCD and transmit them to the mobile phone via Bluetooth.

  To provide a compact, low-cost, and user-friendly healthcare monitoring system for hospitals, clinics, and home healthcare applications.          

The major building blocks of this project are:  

1. Arduino UNO Microcontroller
2. IR Sensor (User Detection)
3. Digital Blood Pressure (BP) Sensor/Module
4. Load Cell (Weight Sensor)
5. HX711 Load Cell Amplifier Module
6. HC-SR04 Ultrasonic Sensor (Height Measurement)
7. MAX30100 Heart Rate & SpO₂ Sensor
8. MLX90614 Infrared Temperature Sensor
9. Bluetooth Module (HC-05)
10. 16×2 LCD Display.

          Software’s used:  

1. Embedded C programming.
2. Arduino IDE programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.

           

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