Non-Contact Infrared Thermometer Using Arduino

1#include <Wire.h>
2#include <Adafruit_MLX90614.h>
3#include <NewPing.h>
4
5Adafruit_MLX90614 mlx = Adafruit_MLX90614();
6#define TRIG_PIN 9
7#define ECHO_PIN 10
8#define BUZZER_PIN 6
9#define MAX_DISTANCE 100
10NewPing sonar(TRIG_PIN, ECHO_PIN, MAX_DISTANCE);
11
12void setup() {
13    Serial.begin(9600);
14    mlx.begin();
15    pinMode(BUZZER_PIN, OUTPUT);
16}
17
18void loop() {
19    delay(500);
20    int distance = sonar.ping_cm();
21    
22    if (distance > 0 && distance <= 10) {
23        delay(2000); // Allow time for stable reading
24        float temp = mlx.readObjectTempC();
25        Serial.print("Temperature: ");
26        Serial.print(temp);
27        Serial.println(" °C");
28        
29        if (temp > 30.0) {
30            tone(BUZZER_PIN, 1000, 500); // High temperature alert
31        } else {
32            tone(BUZZER_PIN, 500, 500);  // Low temperature alert
33        }
34    }
35}