NOOB ALERT
Firstly ,Sorry if this comes across as a basic/ elementary level query. Any help would be appreciated
Problem : LCD shows only " PRESS Button " and timer stuck at "00:00:00)
Trying to get a coutdown timer going when a push button is pressed , and relay comes on during countdown time .
Attached below is the sketch :
#include <Wire.h>
#include <LiquidCrystal.h>
#define relayPin 8 // the pin relay is connected
#define relayType L
const int relay_pin = 8;
const int button_pin = 10;
long duration;// holds the duration of time
long rememTime;// holds current run time
const int maxtime= 600;// max time 10 mins
int relayState=0;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup() {
// put your setup code here, to run once:
pinMode(relay_pin,OUTPUT);
pinMode(button_pin,INPUT_PULLUP);
lcd.begin(16, 2);
// set up the LCD's number of columns and rows:
lcd.setCursor(0, 0);
// Print a message to the LCD.
lcd.print("PRESS BUTTON");
lcd.setCursor(4, 1);
lcd.print("00:00:00");
delay(2000);
}
void loop() {
// put your main code here, to run repeatedly:
if ( button_pin == LOW){
lcd.clear();
lcd.print("PROCESS ON ");
rememTime=millis()/1000 ;
relayState= 1;
digitalWrite(relayPin, HIGH);
}
if( ( millis()/1000- rememTime) > maxtime) {
relayState = 0;// change relay state to OFF
digitalWrite(relayPin, LOW);
}
}