// After running the simulator, click on the DS18B20 chip to change the temperature
// Chip by bonnyr, source code: https://github.com/bonnyr/wokwi-ds1820-custom-chip/

#include <OneWire.h>
#include <DallasTemperature.h>

OneWire oneWire(10);
DallasTemperature sensors(&oneWire);

float lastTemperature = 0; // Variable to store the last temperature reading
unsigned long lastCheckTime = 0; // Variable to store the last time data was checked
unsigned long lastIncreaseTime = 0; // Variable to store the time when temperature started increasing
const unsigned long checkInterval = 5000; // Interval for checking temperature data (in milliseconds)
const unsigned long increaseThreshold = 10000; // Threshold for detecting increase trend (1 hour in milliseconds)

void setup() {
  Serial.begin(9600);
  sensors.begin();
}

void loop() {
  unsigned long currentTime = millis();

  // Check if it's time to read temperature data
  if (currentTime - lastCheckTime >= checkInterval) {
    lastCheckTime = currentTime;

    sensors.requestTemperatures(); // Request temperature data

    float currentTemperature = sensors.getTempCByIndex(0); // Read temperature in Celsius

    // Check if temperature reading is valid
    if (currentTemperature != -127.00) {
      Serial.print("Temperature: ");
      Serial.print(currentTemperature);
      Serial.println(" °C");

      // Determine trend
      if (currentTemperature > lastTemperature) {
        Serial.println("Uptrend");
        if (lastIncreaseTime == 0) {
          lastIncreaseTime = currentTime; // Start the increase trend timer
        } else if (currentTime - lastIncreaseTime >= increaseThreshold) {
          Serial.println("Temperature has been increasing!"); // Trigger message if temperature has been increasing for 1 hour
        }
      } else if (currentTemperature < lastTemperature) {
        Serial.println("Downtrend");
        lastIncreaseTime = 0; // Reset the increase trend timer
      } else {
        Serial.println("No change");
        lastIncreaseTime = 0; // Reset the increase trend timer
      }

      lastTemperature = currentTemperature; // Update last temperature reading
    } else {
      Serial.println("Error: Failed to read temperature data");
    }
  }
}