@yellowelise

I was glad that I could understand why I could not get the data.
Thank you.

@heybin

I fixed the code according to your advice.
I got data from MLX 90640 with Arduino core ESP32 v1.0.1.
Thank you !

@yellowelise
Thank you !
Using your programs, I got the data from MLX 90640.

I have M5Stack Gray and Thermal Unit.
I use Arduino IDE and I installed Arduino core for ESP32 using the board manager.

I tried the example sketch that was included with M5Stack library.
https://github.com/m5stack/M5Stack/tree/master/examples/Unit/MLX90640

I find that the THERMAL UNIT works or not is depending on the version of the ESP32 software.

• ESP32 v1.0.0 : not work
• ESP32 v1.0.1-rc1 : work
• ESP32 v1.0.1-rc2 : not work
• ESP32 v1.0.1-rc3 : not work
• ESP32 v1.0.1-rc4 : not work
• ESP32 v1.0.1 : not work

Only the v1.0.1-rc1, the Thermal Unit works. But I do not find the reason.

I want to work the Thermal unit with lastest version of ESP32 software.
Please give me some advice.