Help adding start stop push button to program

//i trying write if() statement around code allows push button initiate program. advice wonderful. thank you!

#include<dht.h>      // including library dht
#include<liquidcrystal.h>
liquidcrystal lcd(7, 6, 5, 4, 3, 2);

#define dht_dpin 12
dht dht;

#define pwm 9


byte degree[8] =
              {
                0b00000,
                0b00000,
                0b00000,
                0b00000,
                0b00000,
                0b00000,
                0b00011,
                0b00011
              };

void setup()
{
 pinmode(ledpin, output);
 lcd.begin(16, 2);
 lcd.createchar(1, degree);
 lcd.clear();
 lcd.print("   fan speed  ");
 lcd.setcursor(0,1);
 lcd.print("  controlling ");
 delay(2000);
 analogwrite(pwm, 255);
 lcd.clear();
 lcd.print("robotics final ");
 delay(2000);
}

void loop()
{

  dht.read11(dht_dpin);
  int temp=dht.temperature;
  lcd.setcursor(0,0);
  lcd.print("temperature:");
  lcd.print(temp);   // printing temperature on lcd
  lcd.write(1);
  lcd.print("c");
  lcd.setcursor(0,1);
  if(temp >19)
    {
      analogwrite(9,0);
      lcd.print("fan speed: 100%       ");
      delay(100);
    }
     else if(temp<=19)
    {
      analogwrite(pwm, 255);
      lcd.print("fan off   ");
      delay(100);
    }
  delay(3000);
}

quote from: alexpav37 on dec 05, 2017, 03:24 pm

//i trying write if() statement around code allows push button initiate program. advice wonderful.

that seems @ odds title.

if want program nothing @ start until press button can achieve code in setup()

code: [select]

while (digitalread(buttonpin) == high) { // assumes low when pressed
}


...r

Arduino Forum > Using Arduino > Programming Questions > Help adding start stop push button to program

arduino