GLOBALSAT TR-203A - Manual (Page 34)

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For example, set the device whose IMEI is 011412000010789, the APN is internet, the
user name and password are not necessary, the server type is TCP, the server IP is
220.128.207.75, the server port number 5000.
The setup command is
GSS,011412000010789,3,1,D1=internet,D2=,D3=,D8=02,E0=220.128.207.75,E1=5000
*5E!
4.2 Acknowledgement
Acknowledgement is the acknowledge receipt used to confirm if server or
device receive the command or report from each other.
The following parameters must be set for configuration or sending those
parameters by other action command for enable/disable acknowledgement.
Code
word
Parameters Value Description
A0
Send confirmation to server
after receiving command
from server
1/0
Confirmation
message="ACK\r\n"
when A3=0
When A3=1, A4=1,
confirmation
message=”IMEI,
ACK\r\n"
When A3=1,A4=0,
confirmation
message=”Device ID,
ACK\r\n"
A1
Wait confirmation from
server after sending
message to server
1/0
Confirmation
message="ACK\r"
A2
Timeout of waiting
confirmation from server
u8 0~255
A3 Device Ack with ID string 1/0
A4 ID string is IMEI or device ID 1/0
1=IMEI, 0=Device ID
Available when A3=1
For example, set A0=1, A1=1, A3=1, A4=1, server sends command to TR-203