Monday, September 28, 2026

MLX90640 and ESP32 Thermal Imaging Camera with CYD

I decided to update my  MLX90640 Thermal Imaging Camera for use with a CYD (Cheap Yellow Display).  The use of the CYD should really simplify the project as all you need to do is solder a 4 pin plug wired to the MLX90640. However I got the blue and yellow wires swapped, so I swapped them at the connector to match.


Then I thought I would use my old software but I found a much better program to use with the CYD.  It offeres many more feature and the ability to change settings on the fly.

https://github.com/embedded-kiddie/MLX90640

Here is a picure of me in IR.


I hope to design and print a case to match.  That would likely just be a new back cover for my esisting CYD case design.

Here is someone elses wiring diagram: I used 2.2K resistors soldered on the MLX90640 circuit board.  Dont forget to bridge the I2C jumper too!