/*
  Wokwi | questions
  can someone help me with this project please?
  Lach$ff — 6/20/24 at 11:44 AM
  https://wokwi.com/projects/401226418170277889
*/

#include <EEPROM.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define NUM_LEDS 10
#define EEPROM_SIZE 900
#define TEMP_SENSOR_PIN A0
#define LDR_SENSOR_PIN A1
#define LED_RED_PIN 3
#define BEEP_PIN 2
const int BAR_LED_PINS[NUM_LEDS] = {13, 12, 11, 10, 9, 8, 7, 6, 5, 4};
// NTC characteristic
const float BETA = 3950; // match the Beta spec of your thermistor
// LDR Characteristics
const float GAMMA = 0.7;
const float RL10 = 50;

float temperatureSum = 0.0f;
float lightSum = 0.0f;
int readCount = 0;
int eepromIndex = 0;

LiquidCrystal_I2C lcd(0x27, 16, 2);

float readLight()  {
  int analogValue = analogRead(LDR_SENSOR_PIN);
  float voltage = analogValue / 1023.0 * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  return lux;
}

float readTemperature() {
  int analogValue = analogRead(TEMP_SENSOR_PIN);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  return celsius;
}

void storeData(float temp, float light) {
  if (eepromIndex + 4 > EEPROM_SIZE) {
    eepromIndex = 0;
  }
  EEPROM.put(eepromIndex, temp);
  EEPROM.put(eepromIndex + 2, light);
  eepromIndex += 4;
}

void updateDisplay(float temp, float light) {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temp, 1);
  lcd.print((char)223);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Luz : ");
  lcd.print(light);
  lcd.print(" lx");
}

void updateLedBar(float light) {
  // 100 = 1, 100,000 = 10
  int numLedsOn = (light / 100.0) * NUM_LEDS;

  for (int i = 0; i < NUM_LEDS; i++) {
    if (i < numLedsOn) {
      digitalWrite(BAR_LED_PINS[i], HIGH);
    } else {
      digitalWrite(BAR_LED_PINS[i], LOW);
    }
  }
}

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  pinMode(LED_RED_PIN, OUTPUT);
  pinMode(BEEP_PIN, OUTPUT);
  for (int i = 0; i < NUM_LEDS; i++) {
    pinMode(BAR_LED_PINS[i], OUTPUT);
  }
  // splash screen
  lcd.setCursor(0, 0);
  lcd.print("BlueShield");
  lcd.setCursor(0, 1);
  lcd.print("Inicializando...");
  delay(2000);
  lcd.clear();
}

void loop() {
  float temperature = readTemperature();
  float light = readLight();

  Serial.print("Temp : ");
  Serial.print(temperature, 1);
  Serial.println("°C");
  Serial.print("Light: ");
  Serial.print(light, 0);
  Serial.println(" lx\n");

  temperatureSum += temperature;
  lightSum += light;
  readCount++;

  if (readCount == 30) {
    float avgTemp = temperatureSum / 30.0;
    float avgLight = (lightSum / 30.0); // / 10.23;

    if (avgTemp > 23.0) {
      digitalWrite(LED_RED_PIN, HIGH);
      tone(BEEP_PIN, 1000, 500);
      storeData(avgTemp, avgLight);
    } else {
      digitalWrite(LED_RED_PIN, LOW);
      noTone(BEEP_PIN);
    }

    updateDisplay(avgTemp, avgLight);
    updateLedBar(avgLight);

    temperatureSum = 0;
    lightSum = 0;
    readCount = 0;
  }

  delay(2000);
}