bytes are the number of register to read. “00H00H00H05H” means that the master
requires 5 data from the first address，each data has 2 bytes, and total 10 bytes. That
means the master requires: 3 bytes instantaneous flow rate, 1 byte the flow unit code, 4
bytes accumulated flow rate and 2 bytes level value.
CRC : Cyclic Redundancy Check has 2 bytes, and the low byte first.
For example: the master send the request as follow:
“02H 03H 00H00H 00H05H 85H0FAH”
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