CAI JINYONG
2018-3-30
CHONGHAN CH-D3 WIRELESS DTU USER MANUAL
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at+iusrn=<cr>
// user name(null)
at+ipwd=<cr>
// password(null)
at+ipars<cr>
// parameter save
5.3.2.
Setting VPDN Configuration
Only for CH-D3
at+iusrn=<cr>
// user name(null)
at+ipwd=<cr>
// password(null)
at+iath=n<cr>
// n=1(PAP)
，
2(CHAP) Network
certification mode , need to
consult for the UN
at+ipars<cr>
// parameter save
5.4.
Transmit Mode
at+itup=0<cr>
// disable the function
at+itup=1<cr>
// trigger up mode
at+itup=2<cr>
// always online mode
Note1: at+itup=2 are for common Serial NET, auto redial up when offline;
at+itup=1 is for Serial NET with trigger up, offline when no data transfer in
a period (refer chapter 9 for detail), and trigger up by some signal list below:
1 detect data need to transfer in serial port. 2 detect a ring signal, such as
the wireless module has been dialed.
Note2: When the DTU in the command mode, and at+itup=2, power on, in
about 20~30 seconds the DTU should auto dial up, do not respond any
command, If you don’t want to wait, press a stream “+”, to abort the DTU
operation.
5.5.
Hardware Flow Monitor
