Project 1: Using ultrasonic sensor measure the distance of object in inches/cm. Display the distance in LCD and play buzzer when the object is nearest to the project. Also share the distance value in thingspeak.com
Component:
#include <LiquidCrystal.h>
int trig = 12;int echo = 11;int travelTime;float distance;
float distanceInch;int buzzer = 10;
LiquidCrystal lcd(2,3,4,5,6,7);
void setup()
{
Serial.begin(115200);pinMode(trig, OUTPUT);pinMode(echo, INPUT);delay(1000);
Serial.println(“AT+CWJAP=\”Simulator Wifi\“,\”\“\r\n”); delay(3000);
lcd.begin(16,2);
lcd.print(“Dist CM:”);
}
void loop()
{
lcd.setCursor(10,0);digitalWrite(trig, LOW);delayMicroseconds(10);digitalWrite(trig, HIGH);
delay(10);digitalWrite(trig, LOW);
travelTime = pulseIn(echo,HIGH);delay(20);
distance = (travelTime / 2) * 0.0343;
distanceInch = (travelTime / 2)* 0.013464; lcd.print(distance);
lcd.setCursor(0,1);
lcd.print(“Dist In:”);lcd.setCursor(10,1);lcd.print(distanceInch);if(distance < 80){
tone(buzzer, 100);
else{noTone(buzzer);
}
Serial.println(“AT+CIPSTART=\”TCP\“,\”api.thingspeak.com\“,80\r\n”); delay(500);
int len = 65;Serial.print(“AT+CIPSEND=”);Serial.println(len);
delay(10);
Serial.print(“GET /update?api_key=M0AJWWJG5TXHJEGX&field1=” + String(distance)+“ HTTP/1.1\r\n”);
delay(100); Serial.println(“AT+CIPCLOSE=0\r\n”); delay(600);
}
Steps:
1. Create new channel for ultrasonic sensor data upload
3. Graph (Data @ ThinkSpeak)
#include <Keypad.h>#include <LiquidCrystal.h>
LiquidCrystal lcd(13, 12, 8, 9, 10, 11);
double num1,num2;double total;
char operation,button;
const byte ROWS = 4;const byte COLS = 4;
{‘1’,’2’,’3’,’+’},
{‘4’,’5’,’6’,’-’},
{‘7’,’8’,’9’,’*’},
{‘C’,’0’,’=‘,’/’}
};
byte rowPins[ROWS] = {7,6,5,4};byte colPins[COLS] = {3,2,1,0};
Keypad kpd = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
void domath()
{
}
lcd.clear();lcd.setCursor(0,0);lcd.print(num1);lcd.print(‘ ‘);lcd.print(operation);lcd.print(‘ ‘);lcd.print(num2);lcd.setCursor(0,1);lcd.print(“Ans = ”);lcd.setCursor(6,1);lcd.print(total);
}
void setup() {lcd.begin(16,2);lcd.setCursor(0,0);lcd.print(“Welcome”);delay(1000);
lcd.setCursor(0,1);lcd.print(“Initiating”);delay(500);lcd.print(“.”);delay(500);lcd.print(“.”);delay(500);lcd.print(“.”);delay(1000);lcd.clear();lcd.setCursor(0,0);lcd.print(“Calculator”);delay(500);lcd.setCursor(0,1);lcd.print(“Initiatied”);delay(3000);lcd.clear();
lcd.begin(16, 2);
lcd.clear();lcd.setCursor(0, 0);
}
void loop()
{
if (num1!=0 && (button==‘+’ || button==‘-’ || button==‘*’ || button==‘/’))
operation = button;lcd.setCursor(0,1);lcd.print(operation);break;
}
}
while(1)
if (button == ‘=‘ && num2!=0)
{
domath();break;
}
}
while(1)
}
Reference No. |
Reference Name |
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1 |
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2 |
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3 |
https://www.makerspaces.com/15-simple-arduino-uno-breadboard-projects |
4 |