MSP432P4111: MSP432P4111

Which clock are you using?

Hi, I'm using SMCLK and I was kinda able to reduce the speed by doing this:

    CS_initClockSignal(CS_SMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_64);

That did not resolved the issue because now when I try to read something from the sensor I always get: 0xDD. Any idea?

Hi,

Have you tried other debug steps other than changing the I2C clock speed? 

For instance, have you ensured that the I2C commands that you are sending to the CO2 sensor are correct? Have you checked to make sure that you are using the correct I2C address? There is some discussion here on how sometimes the I2C address provided includes the R/W bit, which the MSP432 does not need: https://e2e.ti.com/support/microcontrollers/msp430/f/166/t/449822

If you could please perform scope captures, compare those against the expected output as shown in the SCD30 documentation that would also be helpful.

Regards,

Michael