Final Year Project 1 & 2 Logbook: March 2021

Wednesday

FYP2 WEEK 9

Activity: Complete the coding for FYP 2

Objective:

To complete the DHT22 coding for the project
To test the coding and troubleshoot the program if there is any problem

#include <Wire.h>

#include "DHT.h"

#include <LiquidCrystal_I2C.h>

#define DHTPIN 12

#define DHTTYPE DHT22

LiquidCrystal_I2C lcd (0x27, 20, 4); //I2C address 0x27, 20 column and 4 row

DHT dht(DHTPIN,DHTTYPE);

int temp_sensor_pin = A0; //The output pin of LM35

int ref_pin = A1;

int fan_pin = 9;

int waterpump_pin = 10;

int heater_pin = 5;

int red_led = 6;

int green_led = 7;

int blue_led = 8;

int buzzer_pin = 11;

int fan_speed;

int ref_value_min = 0;

int ref_value_max = 50;

int max_temp_limit;

int min_temp_limit;

void setup ()

{

Serial.begin(9600);

dht.begin();

lcd.init();

lcd.backlight();

lcd.setCursor(6,0);

lcd.print("AUTOMATIC");

lcd.setCursor(0,1);

lcd.print("COOLING ROOF SYSTEM");

lcd.setCursor(10,2);

lcd.print("BY");

lcd.setCursor(8,3);

lcd.print("EIZLAN");

delay(1500);

lcd.clear();

lcd.setCursor(0,0);

lcd.print("Ref.Temp:");

lcd.setCursor(0,1);

lcd.print("Cur.Temp:");

pinMode(red_led,OUTPUT);

pinMode(green_led,OUTPUT);

pinMode(blue_led,OUTPUT);

analogWrite(fan_pin, fan_speed);

analogWrite(waterpump_pin, fan_speed);

}

void loop()

{

int ref_value;

float temperature = dht.readTemperature();

ref_value = analogRead(ref_pin);

ref_value = map(ref_value, 0, 1023, 0, 100);

max_temp_limit = ref_value+5;

min_temp_limit = ref_value-5;

lcd.setCursor(10,0);

lcd.print(ref_value); //Print refference temperature

lcd.print(" ");

lcd.print((char)223);

lcd.print("C");

lcd.setCursor(10,1);

lcd.print(temperature); //Print temperature

lcd.print(" ");

lcd.print((char)223);

lcd.print("C");

Serial.print("Temperature: ");

Serial.println(temperature);

if (temperature > max_temp_limit)

{

lcd.setCursor(0,2);

lcd.print("HIGH TEMPERATURE");

lcd.setCursor(0,3);

lcd.print("FAN & WP TURN ON");

if(fan_speed<150) fan_speed +=20;

analogWrite(fan_pin, fan_speed);

analogWrite(waterpump_pin, fan_speed);

digitalWrite(heater_pin, LOW);

digitalWrite(red_led,HIGH);

delay(100);

digitalWrite(red_led,LOW);

digitalWrite(green_led,LOW);

digitalWrite(blue_led,LOW);

tone(buzzer_pin,1245,1000);

}

else if (temperature < min_temp_limit)

{

lcd.clear();

lcd.setCursor(0,0);

lcd.print("Ref.Temp:");

lcd.setCursor(0,1);

lcd.print("Cur.Temp:");

lcd.setCursor(10,0);

lcd.print(ref_value); //Print refference temperature

lcd.print(" ");

lcd.print((char)223);

lcd.print("C");

lcd.setCursor(10,1);

lcd.print(temperature); //Print temperature

lcd.print(" ");

lcd.print((char)223);

lcd.print("C");

lcd.setCursor(0,2);

lcd.print("LOW TEMPERATURE");

lcd.setCursor(0,3);

lcd.print("HEATER TURN ON");

if(fan_speed<150) fan_speed +=20;

digitalWrite(fan_pin, LOW);

digitalWrite(waterpump_pin, LOW);

analogWrite(heater_pin, fan_speed);

digitalWrite(red_led,LOW);

digitalWrite(green_led,LOW);

digitalWrite(blue_led,HIGH);

}

else if((temperature <max_temp_limit) && (temperature > min_temp_limit))

{

lcd.clear();

lcd.setCursor(0,0);

lcd.print("Ref.Temp:");

lcd.setCursor(0,1);

lcd.print("Cur.Temp:");

lcd.setCursor(10,0);

lcd.print(ref_value); //Print refference temperature

lcd.print(" ");

lcd.print((char)223);

lcd.print("C");

lcd.setCursor(10,1);

lcd.print(temperature); //Print temperature

lcd.print(" ");

lcd.print((char)223);

lcd.print("C");

lcd.setCursor(0,2);

lcd.print("TEMPERATURE IS");

lcd.setCursor(0,3);

lcd.print("WITHIN LIMIT");

if(fan_speed<150) fan_speed +=20;

analogWrite(fan_pin, fan_speed);

digitalWrite(waterpump_pin, LOW);

digitalWrite(heater_pin, LOW);

digitalWrite(red_led,LOW);

digitalWrite(green_led,HIGH);

digitalWrite(blue_led,LOW);

}

delay(1000); //1s delay

}

FYP2 WEEK 8

Activity: Testing the voltage for the fan, LM35 and DHT22

Objective:

To test the voltage for the output devices and the temperature sensor.

For this testing, I want to see if the output devices and both the temperature sensor have the required voltage.

Type	Input Voltage
LM35	4 V
DHT22	4 V
Fan	5V

Tuesday

FYP2 WEEK 7

Activity: Construct the circuit on Breadboard and testing

Objective:

· To construct the circuit

· To testing the circuit operation.

In this week, the student starts to construct the circuit on the breadboard.

Conclusion:

This can conclude the activity above has done the experiment on the circuit, but the circuit constructed were not operated perfectly

Wednesday

FYP2 WEEK 6

Activity: Complete the coding for FYP 2

Objective:

To complete the LM35 coding for the project
To test the coding and troubleshoot the program if there is any problem

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd (0x27,20,4); //I2C address 0x27, 20 column and 4 row

int temp_sensor_pin = A0; //The output pin of LM35

int ref_pin = A1;

int fan_pin = 9;

int waterpump_pin = 10;

int heater_pin = 5;

int red_led = 6;

int green_led = 7;

int blue_led = 8;

int buzzer_pin = 11;

int fan_speed;

int temperature;

int ref_value_min = 0;

int ref_value_max = 50;

int max_temp_limit;

int min_temp_limit;

void setup ()

{

Serial.begin(9600);

lcd.init();

lcd.backlight();

lcd.setCursor(6,0);

lcd.print("AUTOMATIC");

lcd.setCursor(0,1);

lcd.print("COOLING ROOF SYSTEM");

lcd.setCursor(10,2);

lcd.print("BY");

lcd.setCursor(8,3);

lcd.print("EIZLAN");

delay(1500);

lcd.clear();

lcd.setCursor(0,0);

lcd.print("Ref.Temp:");

lcd.setCursor(0,1);

lcd.print("Cur.Temp:");

pinMode(red_led,OUTPUT);

pinMode(green_led,OUTPUT);

pinMode(blue_led,OUTPUT);

analogWrite(fan_pin, fan_speed);

analogWrite(waterpump_pin, fan_speed);

}

void loop()

{

int sensor_value;

int ref_value;

sensor_value = analogRead(temp_sensor_pin); //Get the sensor reading

ref_value = analogRead(ref_pin);

ref_value = map(ref_value, 0, 1023, 0, 100);

temperature = sensor_value * 0.48828125;

max_temp_limit = ref_value+5;

min_temp_limit = ref_value-5;

lcd.setCursor(10,0);

lcd.print(ref_value); //Print refference temperature

lcd.print("C");

lcd.setCursor(10,1);

lcd.print(temperature); //Print temperature

Serial.print("Temperature: ");

Serial.println(temperature);

lcd.print("C");

if (temperature > max_temp_limit)

{

lcd.setCursor(0,2);

lcd.print("HIGH TEMPERATURE");

lcd.setCursor(0,3);

lcd.print("FAN & WP TURN ON");

if(fan_speed<150) fan_speed +=20;

analogWrite(fan_pin, fan_speed);

analogWrite(waterpump_pin, fan_speed);

digitalWrite(heater_pin, LOW);

digitalWrite(red_led,HIGH);

digitalWrite(red_led,LOW);

digitalWrite(green_led,LOW);

digitalWrite(blue_led,LOW);

tone(buzzer_pin,1245,1000);

}

else if (temperature < min_temp_limit)

{

lcd.clear();

lcd.setCursor(0,0);

lcd.print("Ref.Temp:");

lcd.setCursor(0,1);

lcd.print("Cur.Temp:");

lcd.setCursor(10,0);

lcd.print(ref_value); //Print refference temperature

lcd.print("C");

lcd.setCursor(10,1);

lcd.print(temperature); //Print temperature

lcd.print("C");

lcd.setCursor(0,2);

lcd.print("LOW TEMPERATURE");

lcd.setCursor(0,3);

lcd.print("HEATER TURN ON");

if(fan_speed<150) fan_speed +=20;

digitalWrite(fan_pin, LOW);

digitalWrite(waterpump_pin, LOW);

analogWrite(heater_pin, fan_speed);

digitalWrite(red_led,LOW);

digitalWrite(green_led,LOW);

digitalWrite(blue_led,HIGH);

}

else if((temperature <max_temp_limit) && (temperature > min_temp_limit))

{

lcd.clear();

lcd.setCursor(0,0);

lcd.print("Ref.Temp:");

lcd.setCursor(0,1);

lcd.print("Cur.Temp:");

lcd.setCursor(10,0);

lcd.print(ref_value); //Print refference temperature

lcd.print("C");

lcd.setCursor(10,1);

lcd.print(temperature); //Print temperature

lcd.print("C");

lcd.setCursor(0,2);

lcd.print("TEMPERATURE IS");

lcd.setCursor(0,3);

lcd.print("WITHIN LIMIT");

if(fan_speed<150) fan_speed +=20;

analogWrite(fan_pin, fan_speed);

digitalWrite(waterpump_pin, LOW);

digitalWrite(heater_pin, LOW);

digitalWrite(red_led,LOW);

digitalWrite(green_led,HIGH);

digitalWrite(blue_led,LOW);

}

delay(1000); //1s delay

}

FYP2 WEEK 5

Activity: START BUYING THE COMPONENT

Objective: Starting this week, the student already listed the component that needs to buy. For most of the component such as resistor, transistor, potentiometer etc. I bought from Shoppe. The component will take some time to be delivered. For the time being, I completed my full circuit diagram for the simulation.