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MEITRACK T622 GPRS Protocol
Copyright © 2017 Meitrack Group All rights reserved. - 40 -
RFID (n): has eight hexadecimal characters.
Applicable Model
T622
Example
GPRS Sending
@@w27,353358017784062,D13,0*F4\r\n
GPRS Reply
The example cannot be displayed because of hexadecimal characters.
3.54
Deleting an Authorized RFID Card/iButton – D14
GPRS Sending
D14,RFID(1),RFID(2),…,RFID(n)
GPRS Reply
D14, OK
Description
RFID (n): indicates the RFID to be deleted. The value ranges from 1 to 4294967295.
Decimal.
A maximum of 50 RFID cards can be deleted at a time. One SMS (including protocols)
cannot exceed 140 bytes.
Applicable Model
T622
Example
GPRS Sending
@@Q34,353358017784062,D14,13723455*3B\r\n
GPRS Reply
$$Q28,353358017784062,D14,OK*02\r\n
3.55
Deleting Authorized RFID Cards/iButton Keys in Batches – D15
GPRS Sending
D15,
RFID card start number
,n
GPRS Reply
D15, OK
Description
RFID card start number: ranges from 1 to 4294967295. Decimal.
n: indicates the number of RFID cards to be deleted in batches. Decimal. The maximum
value is
128
.
When the card start number is a value ranging from 1 to 4294967295 and
n
is greater
than or equal to 65536, all authorized numbers will be deleted.
Applicable Model
T622
Example
GPRS Sending
@@K36,353358017784062,D15,13723455,3*97\r\n
GPRS Reply
$$K28,353358017784062,D15,OK*FD\r\n
3.56
Checking the Checksum of the Authorized RFID/iButton Database – D16
GPRS Sending
D16
GPRS Reply
D15, XOR
Description
This command is used to check whether the existing authorized RFID database is
consistent with that recorded in the server.
When the tracker receives the D16 command, the XOR result of all authorized RFIDs is
regarded as the database checksum for responding. After the server receives the
checksum, compare with the XOR result of all authorized RFIDs recorded in the server. If