GLOBALSAT TR-203A - Manual (Page 35)

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whose IMEI is 011412000010789.
After receiving the command, TR-203 will send acknowledgement receipt as
“011412000010789,ACK\r\n”
For example, set A0=1, A1=1, A3=1, A4=0, TR-203 whose device ID is Globalsat,
sends report to server.
After receiving the command, TR-203 will send acknowledgement receipt as
“Globalsat,ACK\r\n”
For example, set A0=1, A1=1, A3=0, server sends command to TR-203
After receiving the command, TR-203 will send acknowledgement receipt as
“ACK\r\n”
4.2.1 Receive Acknowledgement from Server
Receive ACK from server during “A2” time:
Send commands via SMS or UDP or TCP
Server
Send “ ACK ” via SMS or UDP or TCP
Device
“A2” time
Report via SMS or UDP or TCP