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Remote Patient Monitoring System

Story 

 

Introduction

Rural people of Bangladesh are suffering for a long time for a lack of good doctors and health checkups point. They need to travel a long way to take the health service and it is very difficult for old, child and ill people. Frequently it creates unexpected death. But leveraging IoT technology and advanced medical sensors the suffering of remote people can be reduced greatly.

Some health parameters like ECG, heart rate, body temperature, blood pressure, sleep quality, and SpO2 can give some important clues about the illness to a doctor. For the advancement of electronics and medical sensor technology, all those parameters can be measured easily by using low price sensors. And using the internet the information can be transferred to a doctor instantly and the doctor can easily identify the problem.

This demo device collects body temperature, oxygen saturation level, weight, and blood pressure and sends this parameter to AWS cloud. For collecting sensor data and sending it to AWS I used the AVR-IoT-WA development board.

 

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HARDWARE LIST
1 Microchip Technology AVR-IoT WA Development Board
1 DFRobot MAX30102 Heart Rate and Oximeter Sensor Breakout Board
1 DFRobot Gravity I2C OLED-2864 Display
1 Single-Point Infrared Thermometer - MLX90614
1 Li-Ion Battery 1000mA
1 HC-05 Bluetooth Module

Software APPs and Online Services

 

Microchip Technology MPLAB X IDE

Microchip Technology MPLAB Code Configurator

Amazon Web Services AWS IoT

Amazon Web Services AWS SNS

 

Hand Tools and Fabrication Machines

 

3D Printer (Generic)

Soldering Iron(Generic)

Solder Wire, Lead-Free

 

Hardware Connection 

 

For measuring body temperature I used MLX90614 IR thermometer sensor, for oxygen saturation level I used Maxim MAX30102 pulse oximeter sensor. The weight and blood pressure are collecting from separate devices using Bluetooth.

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I used HC-05 Bluetooth module for demonstration purposes. To display the recorded data and configure the device operation I used 0.96 inch OLED display.

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MLX9014 thermometer, MAX30102 pulse oximeter and OLED display all are connected to the AVR-IoT board using I2C protocol. I develop the library for MPLAB X IDE for all three devices.

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Bluetooth device communicate using serial port (TX, RX). The connection diagram was added in the schematic section.

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For placing and making a portable health monitoring box I designed a 3D printed box and the design files are attached in CAD section.

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A separate handheld unit was made for the thermometer. Because you need to keep it very close to your head while measuring the temperature.

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The unit is connected to the main PCB using a cable.

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Software & Cloud Configuration 

 

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AWS Data

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Custom parts and enclosures

 

Main Box Top 

Main Box Bottom

Thermometer Handle

Thermometer Base

 

Schematics

 

Connection Diagram 

 

Code 

 

SSD1306.C

algorithm

MAX30102.h

MAX30102.c

MLX90614.h

MLX90614.c

SSD1306.h

 

GitHub Link 

https://github.com/taifur20/Patient-Monitoring-System--AVR-IoT-WA-Project--

 

The article was first published in hackster, February 1, 2021

cr: https://www.hackster.io/taifur/remote-patient-monitoring-system-7315e5

author: Md. Khairul Alam

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