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	- Project: Fan Control
	- Source Code NOT compiled for: ESP32 DevKit V1
	- Source Code created on: 2024-09-30 06:40:07

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* esp32-wroom will control a 12v fan, using a */
	/* debounce delay function, when the button is */
	/* pressed it will power the fan 50% speed, when the */
	/* button is pressed again the fan will speed at 100% */
	/* speed, when it is pressed again it will power off. */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include 	//https://github.com/evert-arias/EasyButton

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t button_PushButton_PIN_D4 = 4; // Pin for the push button
const uint8_t fan_PIN = 5; // Pin for controlling the fan (PWM capable pin)

/****** DEFINITION OF LIBRARIES CLASS INSTANCES *****/
// Instance of the EasyButton class for the button connected to pin D4
EasyButton button(button_PushButton_PIN_D4);

/****** CALLBACK FUNCTION PROTOTYPES *****/
// Callback function to be called when the button is pressed
void onPressed(void);

// Variable to keep track of the fan speed state
int fanSpeedState = 0; // 0 = OFF, 1 = 50% speed, 2 = 100% speed

/****** SETUP FUNCTION *****/
void setup(void)
{
    // Initialize Serial for debugging purposes
    Serial.begin(115200);
    Serial.println();
    Serial.println(">>> EasyButton pressed example <<<");

    // Initialize the button
    button.begin();
    // Add the callback function to be called when the button is pressed
    button.onPressed(onPressed);
    
    // Initialize the fan pin as output
    pinMode(fan_PIN, OUTPUT);
}

/****** LOOP FUNCTION *****/
void loop(void)
{
    // Continuously read the status of the button
    button.read();
}

// Callback function implementation
void onPressed(void)
{
    // Change the fan speed state based on the current state
    fanSpeedState++;
    if (fanSpeedState > 2) {
        fanSpeedState = 0; // Reset to OFF after 100% speed
    }

    // Control the fan speed based on the state
    switch (fanSpeedState) {
        case 0: // OFF
            Serial.println("Fan turned OFF");
            analogWrite(fan_PIN, 0); // Turn off the fan
            break;
        case 1: // 50% speed
            Serial.println("Fan at 50% speed");
            analogWrite(fan_PIN, 128); // Set fan to 50% speed (assuming 0-255 PWM range)
            break;
        case 2: // 100% speed
            Serial.println("Fan at 100% speed");
            analogWrite(fan_PIN, 255); // Set fan to 100% speed
            break;
    }
}

/* END CODE */