Published February 27, 2020

Smart Hospital Room

The following project is an arduino based system that provides live monitoring on temperature in a hospital room

IntermediateProtip8 hours1,186

Things used in this project

Hardware components

Arduino UNO

LED (generic)

LED, Blue

Jumper wires (generic)

Adafruit RGB Backlight LCD - 16x2

DFRobot Gravity: Analog LM35 Temperature Sensor For Arduino

Seeed Studio Grove - I2C Touch Sensor(MPR121)

Buzzer

Software apps and online services

Arduino IDE

Fritzing.org

Hand tools and fabrication machines

Solder Wire, Lead Free

Story

Press the flip flop key for the j / k code.

At the beginning we define variables for our program. We see that: To create a variable you must use the command

"int_name = port; ». IT IS ALWAYS WRITTEN FROM" installation blank () ".

We then define which doors will be the entrances and the exits.

"PinMode (name, OUTPUT / INPUT)"

After pressing the jk flip flop code, it concludes with "void loop ()".

j = digital identification (button);

if ((j == HIGH) && (k == LOW)) {

clk = 1-clk;}

k = j;

if (clk == 1) {digital writing (led, HIGH);

else {digitalWrite (led, LOW);

}}

In this project we will look at key commands and key components used in the Arduino. We use a buzzer, 3 led, a button in our case with a touch sensor. We also use a Liquid Crystal which is the Arduino screen. First we will see how we can do the basics like giving the command to open 1 Led. Initially for my convenience I will set some parameters by quoting the shot that analog or digital will use. This procedure was also explained before reference (row 5) 'int_onoma = port; ». The process of defining the variable necessarily takes place over the installation gap.

Next to the setting we specify via the pinMode command whether the slot we are using is essentially an input or an output (OUTPUT / INPUT)

E.g. pinMode (led, OUTPUT);

In our example of this we combine it with the application of the JK flip flop, essentially the switch.

By default, if we give our application Terms and Conditions that will open the led. In the simplest case we can use a button with the following code.

button int = 2.

int led = 1.

int x = 0;

void set () {

pinMode (button, ENTER);

pinMode (led, OUTPUT);

}

empty loop () {

x = digital identification (button);

if (x == 1) {digitalWrite (led, HIGH)?}

otherwise {digitalWrite (led, LOW)}

}

Temperature sensor LM35

To be able to use this sensor we need to understand the wiring, which must be received to receive an output signal (mV). From the manufacturer I know that: 1) it is the power supply (Vcc = 5 / 3V), 2) it is the analog output gate (output 10mV / C), 3) ground (GND).If it properly connects the sensor listens to the code.

int tempPin = 1;

Serial.print ("TEMPRATURE =");

int m = 0;

Serial.print (cel);

void install ()

{

{Serial.print ("* C");

Serial.begin (9600);

Serial.println ();

}

delay (1000);

empty loop ()

{

}

m = analogRead (tempPin);

float mv = (m / 1024.0) * 5000;

float cel = mv / 10;

LiquidCrystal

It is widely used for placing low-speed IC peripherals on processors and microcontrollers for on-road and off-road communication.

The I2C uses only two open collector open or drain lines, the Serial Data Line (SDA) and the Serial Clock (SCL), with resistors pulled. Typical voltages used are +5V or +3.3V. The I2C reference scheme has 7 address addresses, with a 10 bit bit extension being used. The usual I2C bus speeds are 100 kbit / s standard and 400 kbit / s fast.

Connecting the LCD screen to the microcontroller

Using this I2C technique, we can operate our LCD screen to display data from our sensors or any text from the microcontroller using only 2 pins, ie SCL (which is pin clock) and SDA (which is pin pin) use the other 2 pins for power supply. i.e. Vcc and Gnd.

steps

1. Connect the SCL and SDA data SCL and SDA pin to your microcontroller, (if you do not know which terminal is SCL and which is the SDA, check the pin-out data sheet) so for this tutorial you will use a microcontroller ARDUINO UNO, which has SCL as A5 pin, SDA pin as A4.) 2. Connect 5V to 5V, and Gnd to the arduino pin ground. 3. Adjust the LCD screen contrast using the cartridge on the back of the LCD unit.

Finding the HexaDecimal address of the I2C LCD

We can connect to multiple I2C devices at the same time, but to distinguish between devices, the HEX hex address is allocated to each of the I2Cs, which we need to know before proceeding further.

To find out this address,

1. Connect the I2C device to the Arduino Uno, (Follow the previous step).

2. Download the attachment code and upload to your IDE.

3. Open Serial Moniter, which will return the Hex address of the I2C Connected device.

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd (0x3F, 16.2);

void setup ()

{

lcd.init (); // initialize the lcd

lcd.init ();

// Print a message

Photos during the process :

Schematics

Code

Code of Project

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x3F, 16, 2);
int buzzer = 9;
int led=13;
int ledy=8;
int ledg=7;
int button=2;
int val=0;
int old_val=0;
int state=0;
int tmp=0;
int tempPin = 1;
void setup ()

{
  
  Serial.begin(9600);
  
  lcd.init();
  lcd.backlight();
  
  pinMode(buzzer, OUTPUT);
  pinMode(led,OUTPUT);
  pinMode(button,INPUT);

}

void loop()
{

tmp = analogRead(tempPin);
float mv = ( tmp/1024.0)*5000;
float cel = mv/10;

/* Tranformation to Fahrenheit
/*float farh = (cel*9)/5 + 32;*/

Serial.print("TEMPRATURE = ");
Serial.print(cel);
Serial.print("*C");
Serial.println();
delay(100);
lcd.setCursor(2,0);
lcd.print("temp=");
lcd.print(cel);
lcd.print("*C");

/*Serial Port Simulation  */
Serial.print("TEMPRATURE = ");
Serial.print(farh);
Serial.print("*F");
Serial.println();

val=digitalRead(button);

if( (val==HIGH) && (old_val==LOW))
{
  state=1-state;
  
}
   old_val=val;
   
if (state==1)
{ 
  digitalWrite(led, HIGH);
    tone(buzzer, 1100);
 lcd.setCursor(9,1);
 lcd.print("ALARM");
    delay(1000);
  
}
else
{
  digitalWrite (led,LOW);
  noTone(buzzer);
    lcd.setCursor(9,1);
    lcd.print(" ");
  
}
if ((cel<17) || (cel>22)) 
{ 
  digitalWrite(ledy, HIGH);
    tone(buzzer, 1100);
  lcd.setCursor(2,1);
  lcd.print("ALARM "); 
  delay(100);}
else 
{
  digitalWrite (ledy,LOW);
  noTone(buzzer);
   delay(100);
  
}
if ((cel>17) && (cel<22)) 
{
    digitalWrite(ledg, HIGH);
  lcd.setCursor(2,1);
  lcd.println("NORMAL");
    delay(100);
  
}

else 
{
  digitalWrite (ledg,LOW);
lcd.setCursor(2,1);
lcd.println("ALARM ");
  delay(100);
  
}

Credits

Iasonas Christoulakis

9 projects • 31 followers

Biomedical Engineer MedispLab Instructor Former General Manager at IEEE NTUA Student Branch

Smart Hospital Room

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Temperature sensor LM35

LiquidCrystal

Connecting the LCD screen to the microcontroller

Finding the HexaDecimal address of the I2C LCD

Photos during the process :

Custom parts and enclosures

Function

Schematics

Schematics

Code

Code of Project

Credits

Iasonas Christoulakis

Comments

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Smart Hospital Room

Smart Hospital Room

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Temperature sensor LM35

LiquidCrystal

Connecting the LCD screen to the microcontroller

Finding the HexaDecimal address of the I2C LCD

Photos during the process :

Custom parts and enclosures

Function

Schematics

Schematics

Code

Code of Project

Credits

Iasonas Christoulakis

Comments

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