GL100 @Track Air Interface Protocol
4.12. Synchronization ACK example
As UDP is a connectionless protocol, the @Track Protocol provides the mechanism SYNC-ACK
to ensure an uplink message has been sent to the backend server. The
AT+GTACK
command is
used to enable or disable the mechanism. Here are two examples using the
AT+GTACK
command:
Example1:
Enable the mechanism for all uplink messages:
AT+GTACK=gl100,
2
,
FFFFFFF
,20090709145700
“
2
” means to wait for the SYNC-ACK message for only the uplink messages sent by UDP
connection. “
FFFFFFF
” means to wait for the SYNC-ACK message for all uplink messages.
The backend server will receive an uplink message at the most 6 times if it does not reply with a
SYNC-ACK message for the uplink message.
Example2:
Disable the mechanism for all uplink messages:
AT+GTACK=gl100,
2
,
0
,20090709145700
“
2
” means to wait for the SYNC-ACK message when the uplink messages sent by UDP
connection.
“
0
” means not to wait for the SYNC-ACK message for all uplink messages.
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