While loop only works once

Projects Programming
1

Hi everyone.

In this sample code I start counting down from 60 to 0,when the 60 is 0, I want to decrement another value only once, then repeat the count from 60 to 0.

This does not happen , the 60 counts down to zero and my second value immediately counts down to zero and execit the while loop.

Please any advice.

Thanks.

#include <LiquidCrystal.h>;

LiquidCrystal lcd(18, 17, 4, 5, 6, 7);


int secs = 60;
int valveDelay = 2;//2 x 60 secs = 2 mins

//====== count seconds ========
void countSecs()
{
  while (secs > 0)
  {
    lcd.setCursor(13, 2);
    lcd.print("  ");
    lcd.setCursor(13, 2);
    secs = secs - 1;
    lcd.print(secs);
    delay(200);
  }
}
//=============================

void setup()
{
  Serial.begin(9600);
  Serial.println("Ver 1.02 - 2.6.2019");

  lcd.begin (16, 4); //x,y
  lcd.print("Ver 1.02 ");
  lcd.setCursor(0, 1);
  lcd.print("2/6/2019");

  delay(3000);
  lcd.clear();

  lcd.setCursor(11, 2);
  lcd.print("  ");
  lcd.setCursor(11, 2);
  lcd.print(valveDelay);//Print 2 on screen

}

void loop()
{
  while (valveDelay > 0)
  {
    countSecs();

    lcd.setCursor(11, 2);
    lcd.print("  ");
    lcd.setCursor(11, 2);
    valveDelay = valveDelay - 1;
    lcd.print(valveDelay);
    int secs = 60;

  }
}
2

You have two different variables named secs in your program, each with their own scope. In practice the one declared in loop() is never used. If you want to set the global one to 60 in loop() then remove the int data type specifier to avoid declaring a separate variable

3

Thanks

I will fix this and report back.

4

Thanks again ,works 100%.

5

Good news

Do you understand what the problem was ?