Mlx90640 IR - 5v or 3.3


I connect the mlx90640 to Diolan sda, scl , GND and 3.3v
it does not work yet , I2C master failed to write.

First question:
Does the small part need 3.3v or 5v?
although it says 3-6v

Is there a getting started with MCU how to work with the mlx90640?

When connected to a Raspberry Pi 3.3V should be fine. As the Pi uses 3V logic.
And as far as I know, using 5V instead of 3V will not hurt the MLX90640.
I have no idea if that affects the logic level it uses though? I think not, but I’m not 100% sure.
Does the Diolan use 3V or 5V logic?