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The following will look at the significance of each byte of a simple (Read tag) command (“01 02 08 32 38”). The “01” is the Start Byte indicating the start of a command string. The “02” is the length (from the next byte and up to, but not including, the BCC). The “08” is Command I - “0000 1000” – which is the bit pattern that instructs the reader to perform a single command, not to calculate the BCC checksum and to set Power Burst I. The “32” in the Data Field is the 50 ms Power Burst value (50dec = 32hex) and finally, the “38” is the checksum calculated on all data after the Start Byte.
PTM Published on: 2009-03-16
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