Doctor’s Private Chamber Entry Management
Submitted By
- Mahdi Hasnat Siyam (1705003)
- Khandokar Md. Rahat Hossain (1705024)
- Kawshik Kumar Paul (1705043)
Project Supervisor
Dr. A. B. M. Alim Al Islam
Professor, Department of Computer Science and Engineering,
Bangladesh University of Engineering and Technology (BUET)
Maximum doctors have their own private chamber for the patients’ treatments. A private chamber is generally a tiny or small place with one or two rooms. A doctor usually keeps himself/herself is a room and the patients’ come inside the room one by one maintaining their serial. Usually an assistant outside doctors’ room manage all of these things.
Sometimes it’s not so easy to maintain the serial. Even after entering inside the doctors’ room, the doctor measures the body temperature, pulse rate etc of the patient as these are the basic measure of a patient’s health condition. It is very time consuming as temperature, pulse rate measuring needs nearly more than one minute each.
In this project we have made a model by which the patient will put their details through a keypad and then the body temperature and pulse rate will be measured using some sensors and then stored. Doctor will call the patients inside the room maintaining their serial by pressing a button. In an LCD monitor, doctor will be able to see the current patient details.
In a private chamber, there will be two parts. One is Patients’ Corner and the other is Doctors’ Corner.
This is a waiting room where patients’ come and wait for the doctors’ call for checkup. In this room there will be a booth. In that booth, there is a keypad with lcd monitor, temperature sensor and pulse sensor. Patient will come to this booth and provide their name, age, mobile number through this keypad and by the help of that sensors, they will provide their body temperature and pulse rate. After successfully done with all these, patient will receive a serial number.
On doctors’ table there will be a lcd monitor and a button. The patients who have registered, will be in a queue. If the doctor press the button, the patient who is in the front of the queue will be called and the information of the patient will be shown in the lcd monitor. After checking up the patient, the next button press will call the next patient and queue will be popped.
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ATMega32
A low power CMOS 8-bit microcontroller based on AVR enhanced RISC architecture. -
4x4 Matrix Membrane Keypad
A 16 button matrix keypad with a maximum rating of 24 VDC, 30 mA and bounce times$\leq$ 5 ms.
To determine which button is pressed on the keypad, it first pulls each of the four columns either low or high one at a time. Then it polls the states of the four rows and depending on the column states, it can tell which button was active.
We used the 4x4 keypad for taking some primary information of a patient. -
Sensors
Temperature Sensor (LM35A)
We essentially used LM35A to receive the body temperature of a patient as a pre-registration requirement.
Heart Rate Sensor (XD-58C)
A pulse sensor for measuring heart rates. Its outcome can be measured by sensing heart beat pulses with a certain sampling rate and taking regression of the points about a certain threshold.
[fig:mylabel]We used XD-58C to receive the regular bpm of a patient prior to registration.
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16x2 Character LCD Display (LM016L)
We used LM016L to display the input entries and processings in the Patients’ corner.
[fig:mylabel]16x2 I2C Interface LCD Display (JHD-2X16-I2C) We used JHD-2X16-I2C to display the detailed information of the current patient in Doctor’s chamber.
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Connection with HC-05 with UART 9600 baud rate
Initially we were working with hc-05 blue-tooth module. In data mode default settings has UART 9600 baud rate connection. But, frequency of our atmega32 was 1Mhz initially. So normal UART connection for 9600 baud rate with 1mhz atmgea32 leads to 7.5% baud rate error. So to reduce error rate, we used double speed UART connection having error rate 0.16%. -
Connection with HC-05 with UART 38400 baud rate
At the end our project HC-05 started malfunctioning. So we decided to reset hc-05. From data-sheet we found that we need to connect hc-05 with attention mode.In attention mode hc-05 works with UART 38400 baud rate. So if we setup 1mhz atmega32 normal UART connection for baud rate 38400, it will lead us 22.9% error. If we try with double speed UART connection we can obtain minimum 18,6% error rate. So we cannot work with 38400 UART connection with 1mhz atmega32. So only option we had, was to work with atmega32 with frequency.
Due to lockdown we could not buy new crystal oscillator. But from atmega32 data-sheet, we found out that we can drive atmega32 at 8 mhz frequency from its internal oscillator. So we changed clock frequency of atmega32 to 8mhz by altering fuse bit (CKSEL) through extreme burner and usb-asp.
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Factory reset setting for HC-05
After connection with hc-05 in attention mode from 8mhz atmega32, we sent different AT command. Specially we tried resetting by sending$``AT+ORGL\backslash r\backslash n"$. After sending AT command, we got successful reply from hc-05 module. Still we could make connection with our mobile device with hc-05. We concluded that hc-05 might broken. So we wanted to buy new hc-05. But there was strict lockdown and we did not have enough time to wait for online delivery. So we decided to go on without hc-05 module.
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GitHub Repository:
https://github.com/kawshikbuet17/Doctor-Private-Chamber-Entry-Management -
YouTube Demo:
https://www.youtube.com/watch?v=6ee5QwgHWOg
This project proposes a low cost way to manage a doctor’s private chamber with some smart features. This is a very efficient way to manage the patients’ serial and their checkup informations. If we were able to integrate our bluetooth android app, we could make smarter management system through wireless medium with some more features. Due to strict Covid-19 lockdown, we couldn’t manage Arduino-UNO, so we couldn’t make it wireless. We will try to make this project better in future. However, it was a great experience working with microcontroller.