Home Chipkit MLX90615 infrared thermometer and Chipkit

MLX90615 infrared thermometer and Chipkit

by shedboy71

In this article we will look at the mlx90615 infrared thermometer connect it to a chipkit, in this case we used a chipKit Max32 but the other boards should work as well

The MLX90615 is a miniature infrared thermometer for non-contact temperature measurements. Both the IR sensitive thermopile detector chip and the signal conditioning ASIC are integrated in the same miniature TO-46 can.

The infrared thermometer comes factory calibrated with a digital SMBus output giving full access to the measured temperature in the complete temperature range(s) with a resolution of 0.02 °C. The sensor achieves an accuracy of ±0.2°C within the relevant medical temperature range. The user can choose to configure the digital output to be PWM.


Factory calibrated in wide temperature range: -20 to 85°C for sensor temperature and -40 to 115°C for object temperature
High accuracy of 0.5°C over wide temperature range (0..+50 C for both Ta and To)
Medical accuracy of 0.2°C in a limited temperature range
Measurement resolution of 0.02°C
SMBus compatible digital interface for fast temperature readings and building sensor networks
Customizable PWM output for continuous reading
3V supply voltage with power saving mode


Here is a layout which shows how to connect the sensor to a chipkit

max32 and ml90615

max32 and ml90615


This particular example comes from the following library which I installed for testing – https://github.com/skiselev/MLX90615

[codesyntax lang=”cpp”]

#include <Wire.h>
#include <mlx90615.h>

MLX90615 mlx = MLX90615();

void setup() 
  Serial.println("Melexis MLX90615 infra-red temperature sensor test");
  Serial.print("Sensor ID number = ");
  Serial.println(mlx.get_id(), HEX);

void loop() 
  Serial.print("Ambient = ");
  Serial.print(" *C\tObject = ");
  Serial.println(" *C");




Open the serial monitor and you should see something like this displayed

Melexis MLX90615 infra-red temperature sensor test
Sensor ID number = 876736
Ambient = 19.13 *C Object = 20.55 *C
Ambient = 19.13 *C Object = 20.55 *C
Ambient = 19.09 *C Object = 20.49 *C
Ambient = 19.09 *C Object = 20.49 *C
Ambient = 19.09 *C Object = 20.61 *C
Ambient = 19.09 *C Object = 20.65 *C
Ambient = 19.09 *C Object = 20.49 *C
Ambient = 19.13 *C Object = 20.45 *C
Ambient = 19.13 *C Object = 22.91 *C



1PCS MLX90615 Digital Infrared Temperature Sensor for Arduino


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