CAI JINYONG
2018-3-30
CHONGHAN CH-D3 WIRELESS DTU USER MANUAL
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when first destination reply
time out
at+ipgt=10000<cr>
// setting timeout
at+ipfr=n<cr>
// setting frequency to send
ping packet
at+ipars<cr>
// parameter save
Note: The function is only for Serial NET always online mode, detect
whether online by period sending ping packet. Redial up when be detected
offline. In Chinese mainland, China Unicom gateway filter the ping packet
to Internet, so the user should set the destination to China Unicom’ DNS.
Common China Unicom DNS: 220.192.32.103/220.192.0.130
5.2.
Baud Rate
at+ibdrf=<rate><cr>
// the command mode baud rate
at+isnsi=”<rate>,8,<parity>,1,0”<cr> // the send mode baud rate
at+ipars<cr>
// parameter save
<rate>
Baud Rate
3
2400
4
4800
5
9600
6
19200
7
38400
8
57600
9
115200
<parity>
Description
n
no parity
o
odd parity
e
even parity
Note: the baud rate will take effect after setting, save and reboot.
5.3.
Setup APN or VPDN
5.3.1.
Setting APN Configuration
Only for CH-D3
at+imis=”at+cgdcont=1,ip,ctlte”<cr> // Setting network(APN)
