good evening everyone...I need help with my new project which is an arduino coin counter using arduino uno, coin hopper, i2c 16x2, 3 buttons for add, subtract and start/push button, relay module, my problem is when the coin counter is booted, the coin hopper starts automatically, I use a non inverted relay module, then the coin hopper doesn't want to stop even when it has reached the coin limit that was set and when I want to pause the coin hopper from counting then I resume again the arduino dies and it reboots again,,I hope you can help me what is wrong with my code,, this is the code I am using
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// Pin Definitions
#define ADD_BUTTON 2
#define SUBTRACT_BUTTON 3
#define START_BUTTON 4
#define RELAY_PIN 5
#define COIN_SENSOR_PIN 7
// LCD Address, columns, and rows
LiquidCrystal_I2C lcd(0x27, 16, 2);
// Variables
int coinCount = 0;
int coinLimit = 0; // Start with 0 coin limit
bool isCounting = false;
bool isPaused = false;
bool buttonState = HIGH; // Current state of the button
bool lastButtonState = HIGH; // Previous state of the button
int totalCoins = 0; // Total coins counted in the current session
bool limitReached = false; // Tracks if the limit has been reached
void setup() {
// Initialize Serial for debugging
Serial.begin(9600);
// Initialize LCD
lcd.init();
lcd.backlight();
// Initialize pins
pinMode(ADD_BUTTON, INPUT_PULLUP);
pinMode(SUBTRACT_BUTTON, INPUT_PULLUP);
pinMode(START_BUTTON, INPUT_PULLUP);
pinMode(RELAY_PIN, OUTPUT);
pinMode(COIN_SENSOR_PIN, INPUT_PULLUP);
// Initial states
digitalWrite(RELAY_PIN, LOW);
// Display bootscreen
showBootScreen();
// Display initial state
updateDisplay();
// Debug: Display initial message
Serial.println("System Initialized");
}
void loop() {
// Check for Add Button Press
if (digitalRead(ADD_BUTTON) == LOW && !limitReached) {
coinLimit++;
updateDisplay();
Serial.println("Add Button Pressed - Coin Limit Increased");
delay(200); // Debounce delay
}
// Check for Subtract Button Press
if (digitalRead(SUBTRACT_BUTTON) == LOW && !limitReached) {
if (coinLimit > 0) coinLimit--; // Prevent negative limits
updateDisplay();
Serial.println("Subtract Button Pressed - Coin Limit Decreased");
delay(200); // Debounce delay
}
// Check for Start/Pause Button Press
buttonState = digitalRead(START_BUTTON);
if (buttonState == LOW && lastButtonState == HIGH) {
if (!isCounting && limitReached) {
resetCounting(); // Reset count and start a new session after limit reached
totalCoins = 0; // Reset total coins for a new session
startCounting(); // Start counting again
Serial.println("Start Button Pressed - Counting Started After Limit Reached");
} else if (!isCounting && !limitReached) {
startCounting(); // Start counting if not already counting
Serial.println("Start Button Pressed - Counting Started");
} else if (isCounting && !isPaused) {
pauseCounting(); // Pause counting if currently counting
Serial.println("Start Button Pressed - Counting Paused");
} else if (isCounting && isPaused) {
resumeCounting(); // Resume counting if paused
Serial.println("Start Button Pressed - Counting Resumed");
}
delay(200); // Debounce delay
}
lastButtonState = buttonState; // Update last button state
// Check coin sensor during counting
if (isCounting && !isPaused && digitalRead(COIN_SENSOR_PIN) == LOW) {
coinCount++;
totalCoins++; // Increment total coins counted in the current session
updateDisplay();
Serial.print("Coin Inserted - Count: ");
Serial.println(coinCount);
delay(200); // Debounce delay to prevent multiple counts for one coin
// Stop counting if limit is reached
if (coinCount >= coinLimit) {
stopCounting();
Serial.println("Coin Limit Reached - Counting Stopped");
}
}
}
void startCounting() {
// Start counting
digitalWrite(RELAY_PIN, HIGH); // Activate relay
isCounting = true;
isPaused = false;
limitReached = false; // Reset limit reached status
updateDisplay(); // Update the display
}
void pauseCounting() {
// Pause counting
digitalWrite(RELAY_PIN, LOW); // Deactivate relay
isPaused = true;
lcd.setCursor(0, 0);
lcd.print("Paused "); // Show "Paused" on the display
}
void resumeCounting() {
// Resume counting
digitalWrite(RELAY_PIN, HIGH); // Activate relay
isPaused = false;
updateDisplay(); // Continue showing normal display
}
void stopCounting() {
// Stop counting when limit is reached
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Limit Reached!");
lcd.setCursor(0, 1);
lcd.print("Total Coins: ");
lcd.print(totalCoins); // Display the total coins for the session
digitalWrite(RELAY_PIN, LOW); // Deactivate relay
isCounting = false;
limitReached = true; // Set the limit reached flag
}
void resetCounting() {
coinCount = 0; // Reset coin count after stopping
updateDisplay(); // Update to normal display
}
void updateDisplay() {
// Normal display
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Coin Limit: ");
lcd.print(coinLimit);
lcd.setCursor(0, 1);
lcd.print("Count: ");
lcd.print(coinCount);
}
void showBootScreen() {
// Show bootscreen with the name of the coin counter
lcd.clear();
lcd.setCursor(0, 0);
lcd.print(" Coin Counter ");
lcd.setCursor(0, 1);
lcd.print(" Welcome! ");
delay(5000); // Display bootscreen for 3 seconds
// Clear the screen after bootscreen
lcd.clear();
}
