Question

program in arduino

17. Implement the luminosity control of street lighting lamp which has 3 different levels of intensity according to the level of darkness

Answer 1

#include <Wire.h>
#include <LiquidCrystal.h>
#include "RTClib.h"
#define ON 0
#define OFF 1
DateTime now;

RTC_DS3231 rtc;
LiquidCrystal lcd(8, 7, 6, 5, 4, 3); // (rs, e, d4, d5, d6, d7)

const int buttonPin = 2;
const int led=11;
int nob = A3;
int val = 0;
int val1 = 0;
int path=1;
int a=1;
int previousState = HIGH;
unsigned int previousPress;
volatile int buttonFlag;
int buttonDebounce = 20;

int on_hour=1;
int on_minute=1;
int on_second=10;

int off_hour=23;
int off_minute=57;
int off_second=10;

int c_hour=0;
int c_minute=0;
int c_second=0;

int onOrOffFlag = ON;

void showDate(void);
void showTime(void);
void showDay(void);

void loadHandler(int, int , int , int , int , int , int , int , int );

typedef struct userTime
{
int temp_hour;
int temp_minute;
int temp_second;
}userTime_t;
unsigned char checkLessThanOrEqual(userTime_t , userTime_t);

void setup ()
{
Serial.begin(9600);
lcd.begin(16,2);
  
pinMode(buttonPin, INPUT_PULLUP);
pinMode(led,OUTPUT);
attachInterrupt(digitalPinToInterrupt(buttonPin), button_ISR, CHANGE);
  
if (! rtc.begin())
{
Serial.println("Couldn't find RTC Module");
while (1);
}

if (rtc.lostPower())
{
Serial.println("RTC lost power, lets set the time!");
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
}
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  
}

void loop ()
{
if(path)
{
if(a==1)
{
lcd.setCursor(0,0);
lcd.print(" RTC ");
lcd.setCursor(0,1);
lcd.print(" MODE ON ");
delay(2000);
a=0;
}
now = rtc.now();
showTime();
c_hour=now.hour();
c_minute=now.minute();
c_second=now.second();
loadHandler( on_hour, on_minute, on_second, off_hour, off_minute, off_second, c_hour, c_minute, c_second);
delay(1000);
}
else
{
if(a==0)
{
lcd.setCursor(0,0);
lcd.print(" LDR ");
lcd.setCursor(0,1);
lcd.print(" MODE ON ");
delay(2000);
a=1;
}
val = analogRead(nob);
if(val>300 && val<450)
{
lcd.setCursor(0,0);
lcd.print(" 30% ");
lcd.setCursor(0,1);
lcd.print(" Brightness ");
analogWrite(led, 400);
}
else if(val>450 && val<550)
{
lcd.setCursor(0,0);
lcd.print(" 60% ");
lcd.setCursor(0,1);
lcd.print(" Brightness ");
analogWrite(led, 600);
}
else if(val>550 && val<600)
{
lcd.setCursor(0,0);
lcd.print(" 100% ");;
lcd.setCursor(0,1);
lcd.print(" Brightness ");
analogWrite(led, 1023);
}
else if(val<300)
{
lcd.setCursor(0,0);
lcd.print(" 0% ");
lcd.setCursor(0,1);
lcd.print(" Brightness ");
analogWrite(led, 0);
}
}
}

void showTime()
{
lcd.setCursor(0,0);
lcd.print(" Time:");
lcd.print(now.hour());
lcd.print(':');
lcd.print(now.minute());
lcd.print(':');
lcd.print(now.second());
lcd.print(" ");
}

void button_ISR()
{
buttonFlag = 1;
if((millis() - previousPress) > buttonDebounce && buttonFlag)
{
previousPress = millis();
if(digitalRead(buttonPin) == LOW && previousState == HIGH)
{
path =! path;
previousState = LOW;
}
  
else if(digitalRead(buttonPin) == HIGH && previousState == LOW)
{
previousState = HIGH;
}
buttonFlag = 0;
}
}

unsigned char checkLessThanOrEqual(userTime_t a, userTime_t b)
{
if(a.temp_hour < b.temp_hour)
return true;
else
{
if ((a.temp_hour == b.temp_hour) && (a.temp_minute < b.temp_minute))
{
return true;
}
else
{
if(a.temp_hour > b.temp_hour)
return false;
else
{
if((a.temp_minute == b.temp_minute) && (a.temp_second < b.temp_second))
{
return true;
}
else
{
if(a.temp_minute > b.temp_minute)
return false;
else
{
if(a.temp_second == b.temp_second)
{
return true;
}
else
{
return false;
}
}
}
}
}
}
}

void loadHandler(int onTimeHr, int onTimeMin, int onTimeSec, int offTimeHr, int offTimeMin, int offTimeSec, int rtcTimeHr, int rtcTimeMin, int rtcTimeSec)
{

userTime_t in1 = {onTimeHr, onTimeMin, onTimeSec}, in2 = {offTimeHr, offTimeMin, offTimeSec}, rtc_hr = {rtcTimeHr, rtcTimeMin, rtcTimeSec}, a = {}, b = {};

if(checkLessThanOrEqual(in1, in2))
{
onOrOffFlag = ON;
memcpy(&a, &in1, sizeof(userTime_t));
memcpy(&b, &in2, sizeof(userTime_t));
}
else
{
onOrOffFlag = OFF;
memcpy(&a, &in2, sizeof(userTime_t));
memcpy(&b, &in1, sizeof(userTime_t));

}

if((checkLessThanOrEqual(a, rtc_hr)) && (checkLessThanOrEqual(rtc_hr, b)))
{
if(onOrOffFlag == ON)
{
// Switch on the load
digitalWrite(led,HIGH);
lcd.setCursor(0,1);
lcd.print("OffTime:");
lcd.print(off_hour);
lcd.print(':');
lcd.print(off_minute);
lcd.print(':');
lcd.print(off_second);

  
}
else
{
// Switch off the load
digitalWrite(led,LOW);
lcd.setCursor(0,1);
lcd.print(" OnTime:");
lcd.print(on_hour);
lcd.print(':');
lcd.print(on_minute);
lcd.print(':');
lcd.print(on_second);
  
}
}
else
{
if(onOrOffFlag == ON)
{
// Switch off the load
digitalWrite(led,LOW);
lcd.setCursor(0,1);
lcd.print(" OnTime:");
lcd.print(on_hour);
lcd.print(':');
lcd.print(on_minute);
lcd.print(':');
lcd.print(on_second);
}
else
{
// Switch on the load
digitalWrite(led,HIGH);
lcd.setCursor(0,1);
lcd.print("OffTime:");
lcd.print(off_hour);
lcd.print(':');
lcd.print(off_minute);
lcd.print(':');
lcd.print(off_second);
}
}
}