Hi,
while developing firmware, I wrote some unit tests for the Sensirion CRC used in the communication with eg. SHT4x, SCD4x, SPS30, etc
The SCD4x datasheet shows an example of a read_measurement in table 11 on page 27.
The response of this example is CO2 = 500ppm, encoded as 0x01F4.
The related CRC for this field is mentioned as 0x7B.
I think this is wrong, it should be 0x33
The other examples look correct.