Serial com. with Arduino

Serial com. with Arduino

Write a program to transmit data on the PC.

void setup()

{

 Serial.begin(9600);

 

}

void loop() // run over and over

{

 Serial.println("Hello world");

}

Simulation:

Write a program to receive data from the PC.

#include<LiquidCrystal.h>
LiquidCrystal lcd(2,3,4,5,6,7);
int led1=8;
int led2=9;
int led3=10;
int mot1=11;
int mot2=12;
#include<String.h>
int i=0;
char name[20];

void setup()
{
  pinMode(led1,OUTPUT);
   pinMode(led2,OUTPUT);
    pinMode(led3,OUTPUT);
    pinMode(mot1,OUTPUT);
    pinMode(mot2,OUTPUT);
  lcd.begin(16,2);
  Serial.begin(9600);
 
}
void loop()
{
  while(Serial.available())
  {
   char temp=Serial.read();
 
    name[i]=temp;
    i++;
   if(temp==0x0d)
   {
    if(strncmp(name,"bulb is on",10)==0)
    {
     lcd.clear();
     lcd.print("bulb is on");
   
      digitalWrite(led1,HIGH);
      digitalWrite(led2,LOW);
      digitalWrite(led3,LOW);
     
      i=0;
     }
   
   else    if(strncmp(name,"led is on",9)==0)
 {
   lcd.clear();
   lcd.print("led is on");
   digitalWrite(led2,HIGH);
     digitalWrite(led1,LOW);
      digitalWrite(led3,LOW);
       digitalWrite(mot1,HIGH);
       digitalWrite(mot2,LOW);
       delay(1000);
       digitalWrite(mot1,LOW);
       digitalWrite(mot2,HIGH);
       delay(1000);
       digitalWrite(mot1,LOW);
       digitalWrite(mot2,LOW);
 
   i=0;
 }
 else if(strncmp(name,"fan is on",9)==0)
 {
   lcd.clear();
   lcd.print("fan is on");
   digitalWrite(led3,HIGH);
     digitalWrite(led2,LOW);
      digitalWrite(led1,LOW);
     
   i=0;
 
 }

}
  }

  }

Simulation: