CSE-H21 User’s Manual Ver. 1.2
Sollae Systems Co., Ltd.
- 41 -
http://www.sollae.co.kr
commands during the connection, change state to AT command state.
AT Command State
During TCP disconnected, AT commands can be used
To use AT commands during the connection, required
escape sequence
Online State
During TCP connected, all serial data to CSE-H21 convert
TCP and send to ethernet
6.4.1 Changing Online State to AT Command State
To change online state to AT command state during the connection, +++ string
should be transmitted to CSE-H21 as following time interval.
When transm++ string to CSE-H21, +++ string will be sent to peer host.
The time from final data the first „+‟ data
of „+++‟ string
No data over 500ms(guard time)
time intervals between „+‟s
0~500ms
Time interval after receiving last „+‟
No data over 500ms (guard time)
6.4.2 Changing AT Command State to Online State
If CSE-H21‟s state is in AT command state during TCP connection, CSE-H21‟s state
can be changed into online state by an ATO command.
6.5
Example of Configuration with AT Command
Serial Port
Description
AT+PLIP=192.168.1.200<CR>
▶
Setting LOCAL IP address
◀
<CR><LF>OK<CR><LF>
Command OK
AT+PGIP=192.168.1.254<CR>
▶
Setting GATEWAY IP address
◀
<CR><LF>OK<CR><LF>
Command OK
AT+PSM=255.255.255.0<CR>
▶
Setting SUBNET MASK
◀
<CR><LF>OK<CR><LF>
Command OK
AT+PLP=1470<CR>
▶
Setting LOCAL PORT
◀
<CR><LF>OK<CR><LF>
Command OK
AT+PTO=10<CR>
▶
Setting TIME OUT
◀
<CR><LF>OK<CR><LF>
Command OK
AT+PWP<CR>
▶
Saving setting value to EEPROM
