This is a 1200 baud link. The space after the BOLD command in each example is for clarity - it is NOT actually transmitted. H Help - a single line response indicating the available commands.
Typical use is for cal constants, etc.
Blocks are sequential from 0 to 3. The first 2 bytes of block 0 carry special meaning, described below. Divide by 16 to get the actual 12 bit value. This will save a large amount of current consumption.