Documentation

// MLX90614 - Read ambient and object temperature
// Requires: Adafruit MLX90614 Library

#include <Wire.h>
#include <Adafruit_MLX90614.h>

Adafruit_MLX90614 mlx = Adafruit_MLX90614();

void setup() {
  Serial.begin(9600);
  while (!Serial);

  if (!mlx.begin()) {
    Serial.println("Error connecting to MLX sensor. Check wiring.");
    while (1);
  }
  Serial.println("MLX90614 ready.");
}

void loop() {
  Serial.print("Ambient = ");
  Serial.print(mlx.readAmbientTempC());
  Serial.print(" C\tObject = ");
  Serial.print(mlx.readObjectTempC());
  Serial.println(" C");
  delay(500);
}

// MLX90614 on ESP32 via I2C (GPIO21 SDA, GPIO22 SCL)

#include <Wire.h>
#include <Adafruit_MLX90614.h>

Adafruit_MLX90614 mlx = Adafruit_MLX90614();

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22);
  if (!mlx.begin()) {
    Serial.println("MLX90614 not found.");
    while (1);
  }
  Serial.println("MLX90614 ready.");
}

void loop() {
  Serial.printf("Ambient: %.2f C | Object: %.2f C\n",
                mlx.readAmbientTempC(),
                mlx.readObjectTempC());
  delay(500);
}

# MLX90614 on Raspberry Pi via I2C
# Install: pip install smbus2 mlx90614
# Enable I2C: sudo raspi-config -> Interface Options -> I2C

from smbus2 import SMBus
from mlx90614 import MLX90614
import time

bus = SMBus(1)
sensor = MLX90614(bus, address=0x5A)

try:
    while True:
        print(f"Ambient: {sensor.get_ambient():.2f} C")
        print(f"Object:  {sensor.get_object_1():.2f} C")
        print("-" * 30)
        time.sleep(1)
except KeyboardInterrupt:
    bus.close()

# MLX90614 on Pico via I2C0 (GP0 SDA, GP1 SCL)
# Upload an mlx90614.py driver to the Pico filesystem first.

from machine import I2C, Pin
from mlx90614 import MLX90614
import time

i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=100000)
print("I2C scan:", [hex(d) for d in i2c.scan()])

sensor = MLX90614(i2c)

while True:
    print("Ambient: {:.2f} C".format(sensor.read_ambient_temp()))
    print("Object:  {:.2f} C".format(sensor.read_object_temp()))
    print("-" * 30)
    time.sleep(1)