I need a program to print on the screen the pulse count of 3 occupancy sensors.

Other Hardware Sensors
1

I need a program to print on the screen the pulse count of 3 occupancy sensors.
I use Arduino 2009 and 16x2 LCD SHIELD.
I did put the code below is not working properly, what could it be?

// include the library code: 
#include <LiquidCrystal.h> 

int conta1 = 0;
int conta2 = 0;
int conta3 = 0;

// initialize the library with the numbers of the interface pins 
LiquidCrystal lcd(8, 9, 4, 5, 6, 7); 

void setup() { 
// set up the LCD's number of columns and rows: 
lcd.begin(16, 2); 
// Print a message to the LCD. 
lcd.print(conta1); 
lcd.print(conta2); 
lcd.print(conta3); 
} 

void loop() { 
// set the cursor to column 0, line 1 
// (note: line 1 is the second row, since counting begins with 0): 



 if (digitalRead(1)==HIGH)
       {
         conta1++;
       }
       
 if (digitalRead(2)==HIGH)
       {
         conta2++;
       }

if (digitalRead(3)==HIGH)
       {
         conta3++;
       }


}
2

is not working properly

Threaten it with termination of its contract.

What exactly does "not working" mean?

It's a good thing that pins default to inputs, isn't it?

You haven't posted the code that prints the updated values to the LCD

3

How do you know it isn't counting?
You're not doing any displaying of the updated values.

4

I made some modifications, but the error still remains. I think the digital port 0 is varying between 0 and 1. because with port 0 disconnected the serial monitor is counting infinitely

#define PIN 0

int conta=0;
void setup()
{
  Serial.begin(9600);
  pinMode (PIN,INPUT);
  Serial.println("Iniciando...");
}


void loop()

{
  

  if (digitalRead(PIN)==HIGH);
  
  {
  conta++;
  Serial.println(conta);
  
 
  }
}
5 
if (digitalRead(PIN)==HIGH);

Ever seen an "if" like that before?
Ever wonder why?

6

Think the code is wrong? as would be the right?

7

No, I don't think it is wrong.

I know it is wrong.

8

how is right?

9
  1. Find any example code with an "if" in it.
  2. Compare it with your "if".
  3. Play "Spot-the-difference"
#define PIN 0
...
  Serial.begin(9600);
  pinMode (PIN,INPUT);

You may want to think about changing pins

10

not found error. would be better if you show the correct. Thank you!

11

The error is shown in reply #5.
The code inside the quote box shows about 28 characters.
One of them should not be there.