Specifications

5.5. SOFTWARE
Figure 5.11: CRC verification flowchart
3. No tag detected within read range
All responses are sent across RS232 in plain ASCII followed by a carriage
return character.
In the first case, the response is of the form:
OK: XX XX XX XX XX XX XX XX CRC: YY YY
where
XX represents the tag ID in hexadecimal from MSB to LSB and
YY represents the BCC also in hexadecimal form, MSB first.
In the second case, data was received, but it could not be verified. The
following line is generated:
CRC fail: XX XX XX XX XX XX XX XX CRC: YY YY.
This is an indication of excessive noise or a poorly tuned antenna.
In the third case, the buffer was not filled within the 20ms time-out and
it is then assumed that no tag was present. The response is in the form
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