Communication Protocols
Reader Command Response
The basic protocol format is:
<som><resp><eom>
The ECP format is:
<som><seq><resp><crc><eom>
where
<som>
Start-of-message (ASCII # character)
<seq>
Echo of sequence number received in host command
message
<resp>
Response string. The reader will return Done, Error, or
another ASCII string depending on the host transmission.
This string can be up to 72 characters long.
<crc>
CRC for the message
<eom>
End-of-message character (ASCII CR and LF)
Sample Messages
Following are examples of typical messages transmitted between the reader and the
host.
Reader Transmissions
Basic protocol — reader transmission
#SAN RAFAEL APTS 1302&10:15:42.14 02/24/94<eom>
Host response:
No host response for non-ECP.
ECP — reader transmission
#4SAN RAFAEL APTS 1302&10:15:42.14 02/24/94<crc><eom>
where
#
Start-of-message character
4
Message sequence number
SAN RAFAEL APTS 1302
Message data
Tag ID shown, other sample message data:
IOST C0 O2 I0 D24 (Display I/O Status)
04:35:42.45 11/26/95 (Display Time and Date)
Error03 (Buffer Status)
&10:15:42.14 02/24/94
Time and date
8-9
Содержание SmartPass AI1611
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Страница 17: ...A Glossary...
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Страница 22: ...SmartPass Integrated Reader 2450 MHz High Voltage System Guide A 6...
Страница 23: ...B System Specifications...
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Страница 27: ...C Wiring Tables...
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Страница 32: ...SmartPass Integrated Reader 2450 MHz High Voltage System Guide C 6...
Страница 33: ...1 Introduction...
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Страница 41: ...2 Preparing the Site...
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Страница 53: ...3 Quick SmartPass Test...
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Страница 63: ...4 Installing Tags on Vehicles...
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Страница 71: ...5 Installing SmartPass...
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Страница 90: ...6 General Software Information...
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Страница 100: ...7 Modes of Operation...
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Страница 106: ...8 Communication Protocols...
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Страница 125: ...SmartPass Integrated Reader 2450 MHz High Voltage System Guide 9 2...
Страница 174: ...10 Troubleshooting...
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