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Adafruit MLX90640 Thermal Camera Issues
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Adafruit MLX90640 Thermal Camera Issues

by flitcroft56 on Fri Dec 03, 2021 3:40 pm

I purchased a Adafruit MLX90640 from ThePiHut this week, hooked it up and there seems to be 2 dead spots in resolution where it returns a temp of -273.1. in turn, I think this is blowing out the rest of the image due to the contrast between the temperatures.

I have attached a file for the temperature reading directly from the code provided in the github link below (you can see the 2 instances of 273.1). This is blowing out all the results from imaging libraries and rendering them useless.

Github link: https://github.com/adafruit/Adafruit_Ci ... n_MLX90640

I have also attached an image representation of the issue using the tutorial found here (https://makersportal.com/blog/2020/6/8/ ... d-mlx90640)

Anything I can do? or is it a replacement job?

Thanks in advance.
temperature image.png
temperature image.png (68.5 KiB) Viewed 142 times
temp value output.txt
(4.55 KiB) Downloaded 3 times

Posts: 1
Joined: Fri Dec 03, 2021 1:12 pm

Re: Adafruit MLX90640 Thermal Camera Issues

by adafruit_support_mike on Sun Dec 05, 2021 9:00 pm

Yeah, that looks like a couple of dead pixels in the sensor.. I've never seen that happen with an MLX90640 before.

Let the folks from The Pi Hut know we've approved a replacement. If you have any trouble, post back and we'll help however we can.

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Joined: Thu Feb 11, 2010 2:51 pm

Please be positive and constructive with your questions and comments.