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Published by on November 13, 2020

The MLX90614 is an infrared temperature sensor for non-contact temperature measurement. For I2C support the SoftWire software bit-banging Arduino library is used. On an UNO & '328 based Arduino, this is also known as A5, on a Mega it is also known as digital 21 and on a Leonardo/Micro, digital 3; The MLX90614 has a fixed I2C address, you can only connect one sensor per microcontroller! Connect the SCL pin to the I2C clock SCL pin on your Arduino. It senses electromagnetic waves in the range about Arduino learned how to tell the temperature. On an Arduino mega, SDA is digital 20, and SCL is digital 21. The standard wire library wasn't working for people, so we will be using the i2cmaster library instead. Compatibility Infrared Temperature Sensor - MLX90614: Infrared thermometers work based on a phenomenon called black body radiation. If, for any reason, you would like to unsubscribe from the Notification List for this product you will find details of how to do so in the e-mail that has just been sent to you! The MLX90614 is a sensor that can do just that. $15.95. This allows us to have wiki like control over many files for a single project - just like this. Let us know if you do anything with this guy, we would love to see it, and possible feature it on this very blog! Using Melexis MLX90614 Non-Contact Sensors, download Adafruit_MLX90614 from our github repository, http://learn.adafruit.com/adafruit-all-about-arduino-libraries-install-use, DIY Thermal Light Painting - Heat Map Photography. If you are not using an Arduino, make sure your microcontroller can support "repeated start I2C requests"! updated on Feb 28, 2014. Here are some information about the MLX 90614 sensor: You can use this sensor for medical and healthcare applications, home automation, or measure surfaces using a non invasive method. Suggest corrections and new documentation via GitHub. Anything at a temperature above absolute zero has molecules inside of it moving around. To complicate things even more, the i2cmaster wont run on the Arduino out of the box, some files need to be renamed and changed, and an extra txt file is needed to get it working. Author: Steve Marple. Look at the picture to see how it should be connected, but a 4.7KΩ resistor needs to be connected from SDA to 3.3V, and another one from SCL to 3.3V. the I have had my eye on this guy ever since I saw it at Sparkfun, but never had a reason to get one. The datasheet has a diagram from the, Note the tab is how we will keep track of pins, in this wiring image, the tab is on the south side of the sensor, there's a red arrow pointing to it. Library to support Melexis MLX90614 infrared thermometer So... we at bildr did what we do best, we bought one, and took some time to make your lives easier and get this running. To learn more about Infrared and IR sensor circuit , follow the link. Read the documentation. To make this code work, before you load the code, or even open the Arduino program, we need to place the "I2Cmaster" in your Arduino Library. Despite being in an odd casing, the sensor is a lot like a simple sensor in a 'classic' integrated circuit shape. The higher the temperature, the faster the molecules move. This sensor uses a slightly non-standard type of I2C called "repeated-start". Arduino library to support Melexis MLX90614 infrared thermometer using the I2C interface. By reading the infrared light coming off an object, this guy can sense between -95 and 720ºf (-70 to 382.2°C) with 17bit resolution. Maintainer: Steve Marple. Because it consists of many files, I am using bildr's fancy bildrCode wrapper. Once the I2CMaster folder is in there, you can just go ahead and open MLX90614.pde in your Arduino software, and upload it. ... Ambient temperature is the temperature of the sensor itself. By reading the infrared light coming off an object, this guy can sense between -95 and 720ºf (-70 to 382.2°C) with 17bit resolution. (Though 17bits split between -70 and 382 should give us 0.0034ºC resolution). An Arduino based device to read multiple DS18B20 sensors and send the values through a RS232 connection to a domotica system. You will need to drop the library into your Arduino library folder for it to work, but we will get there.

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