Ok success, got it working.

Read somewhere about frequencies and changed the frequency to 50kHz from 5kHz.

Just started working.

Really appreciate also the response on ESP Registry, it helped me also to test few things.

Been testing the sensor and got some progress, with the code below the sensor is now detected.
Decided for now to do the testing using Arduino IDE as feel more comfortable with it.
Problem is still reading the sensor output gives no values:

MLX90614 ready!
Ambient: nan °C | Object: nan °C ...

Thanks, was not aware of this. Actually only used Arduino IDE, which I think I should have mentioned, sorry.

But installed ESP-IDF also and I think I got this library installed but still then same, no luck.

You did give me an idea to try other libraries which are found in Arduino IDE also and ...

Wonder if anyone can give me pointers how to make MLX90614 to work with ESP32?

I have ESP32-C6 and it works with BME280, which is a Temperature, Humidity & Pressure Sensor.

I've tested both MLX90614 and BME280 using I2C, connected to the same pins in ESP32-C6 (8 and 9), not same time just to be ...