I have experience with many I2C sensors and I never got this one work reliably and believe me I tried.... So either it must one or more bugs or the documentation is incomplete. At least I know for sure that none of the problems are related to the ESP 32 I2C module.


I’ve worked with the MLX90614 ...

You're right—the Waveshare ESP32-S3 4.3" display board doesn’t leave many free GPIOs, and the CH422G mainly supports display control. If you need PWM input and CANOpen, you might want to either switch to a board with more accessible GPIOs or use an I2C GPIO expander like the MCP23017. For CANOpen ...