MLX90614 Interfacing with Raspberry Pi | Python | I2C Tutorial | Non Contact Temp Sensor

#temperature #raspberrypi # #contactless #mlx90614 #I2C

In this video, I have explained the interfacing of MLX90614 with Raspberry Pi. It works on the I2C bus protocol.

I hope you like it.!!

You can visit our website for a detailed explanation and code here :
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[electrofun]

There is one mistake in the connections. When you look into the connections they are right but when you see the written notes - I have mentioned SCL - SCL(Pin 4) that is wrong. It will be SCL to SCL (Pin 5 on Raspberry). Please verify all the connections before you power on your Raspberry Pi to avoid damages to your sensor.

[GSNGH]

very nice. i got confused by the characters 1 and l in the code. but it worked. god bless you .

[akshpednekar]

Sir is it possible to get temperature level on lcd by using raspberry pi controller?

[полинакомарова-хы]

Hello, can you please help me with one little thinks? I performed all the steps successfully, but I get AttributeError: "MLX90614 instance has no attribute 'get_ambient'. Can you please tell how can I fix the code or maybe do another one operation to get the code work?
( I use PyMLX90614-0.0.4 version of library)

[shawnkhoo]

Hi. The MLX90614 is powered with 5V. Should there be a voltage divider connected at the SCL/SDA of the ML90614 to prevent overvoltages at the GPIO pins?

[milkawhy]

I got it to work on its own, but it causes problems with other devices on my i2c bus. I think it's a 3.3V vs 5V interface, but I don't really know. Have you seen this issue too?

[allansantosh]

for those having trouble with code on python 3 do this first

pip3 install PyMLX90614

then run this code:

from smbus2 import SMBus
from mlx90614 import MLX90614

bus = SMBus(1)
sensor = MLX90614(bus, address=0x5A)
print (sensor.get_ambient())
print (sensor.get_object_1())
print (sensor.get_object_2())
bus.close()

[manikandanpounraj]

Hi, First of all thank you for simple and neat explanation. I am trying this with R Pi4, is there any limitations or need additional setup for Pi to discover the sensor as slave? Watching your video seems the OS is 4.19.97.. hardware should be something Pi3.

[GSNGH]

Does this work with MLX90615 too? I cant get the code to run in thonny python. it shows that there is a "invalid syntax". it does work in the terminal though. plez help

[HeidiNielsen-hkkj]

I see a lot of other people who encounters the same issue as me, that when doing the "i2cdetect -y 1" the sensor connceted does not show up as 5a. Has anybody found out how to solve this - or is it simply because the sensor does not work? I have tried with two different RPs but none of them could find the sensor. The sensor was brand new and connected accordingly.

[harshvardhangupta]

sir in your diagram u have written pin 4 for SCL and in raspberry Pi diagram below SCL it is connected to pin 5.. I have done the mistake while seeing the video and now my sensor is damaged..so please make some changes so further any one who watches the video may not go wrong .

[antwon]

When i I run the command ls /dev/*i2c* i get the same output as you but when I run i2cdetect -y 1 no address is displayed. Do you know why this might be?

[abbymahabir]

Sir, why is a breadboard in the video? what was it used for?

[carloschicharro]

it is possible that this program runs in python3, because I have a error in compilation, because the program doesn't find the library

[JS-dvpd]

Hello, it's possible to use two sensors at the same time?

[Askin]

Hello Sir, I have the same return as you when i run ls /dev/*i2c* but I don't have the 5A when I run i2cdetect -y 1. I have redone the connections but still nothing. Do you have an idea of the source of my problem

[ayb]

What is the output voltage of the sensor? pi I/O pins are not tolerant for 5v right?

[dsahara]

Traceback (most recent call last):
File "/home/pi/Desktop/temp.py", line 2, in <module>
from mlx90614 import MLX90614
ModuleNotFoundError: No module named 'mlx90614'
can you please tell me why am I getting this error

[joanmasesa]

When I run the code its printing negative values of the temperature what could be the problem, also the addresses i have are 3a and 50 which one is suitable

[elx_tagnongjoshuamathewt.]

How I can fix the syntaxError: invalid syntax? Thank you