#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows
#define GLUCOSE_SENSOR_PIN 34 // Analog pin connected to the glucose sensor

#define ledVerde 15 // Led Normal
#define ledAmarillo 2 // Led Alerta
#define ledRojo 4 // Led Peligro
#define buzzer 16 // Led Peligro




void setup() {
  Serial.begin(9600); // Initialize serial communication

 pinMode(ledVerde, OUTPUT);
 pinMode(ledAmarillo, OUTPUT);
 pinMode(ledRojo, OUTPUT);
 pinMode(buzzer, OUTPUT);


    lcd.init(); // initialize the lcd
  lcd.backlight();
}

void loop() {
  // Read glucose level from sensor
  int glucoseLevel = analogRead(GLUCOSE_SENSOR_PIN);
int glucosaMap = map(glucoseLevel, 0, 4096, 0, 300);
  // Send glucose level data to ThingSpeak


  // Send glucose level data over UART to Raspberry Pi Pico
  Serial.print("Glucose Level: ");
  Serial.println(glucoseLevel);


/*
En ayunas (8 horas sin comer):
Nivel normal: 70-99 mg/dL
Nivel prediabético: 100-125 mg/dL
Diabetes: 126 mg/dL o más
*/

if (glucosaMap >= 70 && glucosaMap <= 99 ) digitalWrite(ledVerde, HIGH);
else digitalWrite(ledVerde, LOW);

if (glucosaMap >= 100 && glucosaMap <= 125 ) digitalWrite(ledAmarillo, HIGH);
else digitalWrite(ledAmarillo, LOW);

if (glucosaMap >= 126 || glucosaMap <= 69 ) 
  {
  digitalWrite(ledRojo, HIGH);
  digitalWrite(buzzer, HIGH);
  delay(500);  // para ver en la simulacion
    digitalWrite(buzzer, LOW);
  }
else   {
  digitalWrite(ledRojo, LOW);
  digitalWrite(buzzer, LOW);
  }


  lcd.clear();              // clear display
  lcd.setCursor(0, 0);      // move cursor to   (0, 0)
  lcd.print("Nivel de glucosa");       // print message at (0, 0)
  lcd.setCursor(0, 1);      // move cursor to   (2, 1)
  lcd.print(glucosaMap); // print message at (2, 1)
  delay(2000);                  // display the above for two seconds

}