"invalid header file"

Projects Programming
1

My first Arduino project, I am creating an alarm system for machine processing.
This is my code:

#include <LiquidCrystal_I2C.h>

#include <Wire.h>

// Pin definitions
const int relayRed = 8;     // Relay for red light
const int relayYellow = 9;  // Relay for yellow light
const int relayGreen = 10;  // Relay for green light
const int relaySiren = 11;  // Relay for siren
const int buttonPin = 2;    // Button to control the system

const unsigned long loadCycleTime = 60000; // Load cycle time in milliseconds (e.g., 60 seconds)

// Adjust the address and dimensions if your LCD is different
LiquidCrystal_I2C lcd(0x27, 16, 2); // Initialize the LCD, adjust the address if needed

unsigned long startTime;
bool cycleRunning = false;
bool buttonPressed = false;
bool lastButtonState = HIGH; // Initial state of the button

void setup() {
  pinMode(relayRed, OUTPUT);
  pinMode(relayYellow, OUTPUT);
  pinMode(relayGreen, OUTPUT);
  pinMode(relaySiren, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);

  digitalWrite(relayRed, HIGH);   // Red light on initially (relay off)
  digitalWrite(relayYellow, LOW); // Yellow light off
  digitalWrite(relayGreen, LOW);  // Green light off
  digitalWrite(relaySiren, LOW);  // Siren off

  // Initialize the LCD with its dimensions and I2C address
  lcd.begin(); // No parameters needed here, defaults to 16x2 and 0x27 address
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Time Left:");
}

void loop() {
  bool currentButtonState = digitalRead(buttonPin);
  if (currentButtonState == LOW && lastButtonState == HIGH && !buttonPressed) {
    delay(50); // Debounce delay
    buttonPressed = true;
    lastButtonState = LOW;

    if (!cycleRunning) {
      startTime = millis();
      cycleRunning = true;

      digitalWrite(relayRed, LOW);    // Turn off red light
      digitalWrite(relayYellow, HIGH); // Turn on yellow light
    } else {
      resetSystem(); // Reset system when button is pressed during siren
    }
  } else if (currentButtonState == HIGH) {
    lastButtonState = HIGH;
    buttonPressed = false;
  }

  if (cycleRunning) {
    unsigned long elapsedTime = millis() - startTime;
    if (elapsedTime < loadCycleTime) {
      unsigned long remainingTime = (loadCycleTime - elapsedTime) / 1000;
      lcd.setCursor(10, 0);
      lcd.print(remainingTime);
      lcd.print(" s  ");
    } else {
      digitalWrite(relayYellow, LOW); // Turn off yellow light
      digitalWrite(relayGreen, HIGH); // Turn on green light
      digitalWrite(relaySiren, HIGH); // Turn on siren
      cycleRunning = false; // Stop the cycle
    }
  }
}

void resetSystem() {
  digitalWrite(relayRed, HIGH);   // Turn on red light
  digitalWrite(relayYellow, LOW); // Turn off yellow light
  digitalWrite(relayGreen, LOW);  // Turn off green light
  digitalWrite(relaySiren, LOW);  // Turn off siren
  lcd.setCursor(10, 0);
  lcd.print("       ");
  cycleRunning = false;
}

Any help would be appreciated

2

And where is your question?

3

great job posting your code using code tags.

Next up - post your complete error message using those same code tags and it will let folks to help.

4

Which exact LiquidCrystal_I2C library are you using?