i have created mlx90640 code that compiles on nano, uno. it uses up to ~1k with i2c buffering. it does image reads as fast as 3 times a second currently. and it does detailed To measurements of the entire screen at 8/10 of a second.
mlx90640 sensor works w 800 bytes | Hackaday.io project info
mlx90640 code runs on nano, teensy-lc and teensy3.1/3.2
GitHub - jamesdanielv/thermal_cam_mlx90640: same as thermal cam project but with mlx90640 sensor code github look in /updates folder
amg8833 sensor code
it is in a constant state of improvement. currently it outputs 64x48. i'm also beginning integration of code for lcd support.
feel free to try it out and provide me feedback with issues.
Regards,
J