#include <Arduino.h>

const int analogPin = 28; // ADC0 on Raspberry Pi Pico
const int ledPin1 = 2;    // GPIO for LED 1
const int ledPin2 = 3;    // GPIO for LED 2
const int ledPin3 = 4;    // GPIO for LED 3

float baselineTemp = 20.0; // Baseline temperature in Celsius
float celsius = 0.0;
float fahrenheit = 0.0;

void setup()
{
  pinMode(analogPin, INPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
  Serial1.begin(115200);
}

void loop()
{
  // Read analog value (0 to 4095)
  int analogValue = analogRead(analogPin);

  // Convert to voltage (millivolts)
  float voltage = (analogValue / 4095.0) * 3300.0; // Pico uses 3.3V as reference

  // Convert voltage to temperature
  // For LM35: 10mV per degree Celsius
  celsius = voltage / 10.0;

  // Convert Celsius to Fahrenheit
  fahrenheit = (celsius * 9 / 5) + 32;

  // Print temperature readings
  Serial1.print("Temperature: ");
  Serial1.print(celsius);
  Serial1.print("°C, ");
  Serial1.print(fahrenheit);
  Serial1.println("°F.");

  // Control LEDs based on temperature
  if (celsius < baselineTemp) {
    digitalWrite(ledPin1, LOW);
    digitalWrite(ledPin2, LOW);
    digitalWrite(ledPin3, LOW);
  }
  else if (celsius >= baselineTemp && celsius < baselineTemp + 10) {
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, LOW);
    digitalWrite(ledPin3, LOW);
  }
  else if (celsius >= baselineTemp + 10 && celsius < baselineTemp + 20) {
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3, LOW);
  }
  else if (celsius >= baselineTemp + 20 && celsius < baselineTemp + 30) {
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3, HIGH);
  }
  else if (celsius >= baselineTemp + 30) {
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3, HIGH);
  }

  delay(1000); // Wait for 1 second
}