The SHT30 command codes

The SHt30 uses 16 bit command codes with a 3 bit CRC (cyclic redundancy check) calculated over the upper 13 bit added on the lowest significant 3 bits.
Let us have a look at the "one time measurement" commands in order to understand the command layout. Here is the table from the data sheet:

If we analyze the codes we get:

As you can see, knowing the repeatability and the clock stretching parameter we can easily construct the command code: Starting from a command code 0x2400 we set bit 11 if clock stretching is enabled and we "or" 01 into bits 3 and 4 for medium and 10 for low repeatability to get the command code. This code we use as a key into a dictionary from where we can pick up the 3 bit checksum, which we or to bits 0..2 .