厦 门 四 信 通 信 科 技 有 限 公 司
Xiamen Four-Faith Communication Technology Co., Ltd.
Add：J1-J2,3rd Floor,No.44,GuanRi Road,SoftWare Park,XiaMen,China
12
Zip Code
：
361008
Tel：+86 592-6300320, +86 592-6300321, +86 592-6300322 Fax：+86 592-5912735 http://
www.four-faith.com www.fourfaith.com
TCST
：
User can set custom register and heartbeat string, Data transmission with TCP
protocol.
AT command:
AT+MODE=xxxx
xxxx: one of the above workmode
◆
Trigger Type
Normally, DTU always keeps online and always be ready for data transmission. But
in some circumstances, it’s important to reduce wireless data flow. To realize this
function, the software can makes DTU into sleep state in idle time. When there is
application data to transmit, DTU can be triggered online ready for data transmission.
There are total five methods to make DTU online:
AUTO: DTU always keeps online
SMSD: send a special short message to make DTU online
CTRL: make DTU online through a phone call to DTU
DATA: send special serial data to make DTU online
MIXD: the combination of SMSD, CTRL, DATA. DTU will be online when meet one
of these three trigger methods.
AT Command:
AT+ACTI=xxxx
xxxx: one of the above trigger methods
◆
Debug Level
Debug information is used to debug software when there is software problem.
0 --- no debug information output
1 --- simple prompt information output
2 --- detail debug information output
AT Command:
AT+DEBUG=x
x : the debug level value
Note: Only there is some problem to the DTU, It’s necessary to set this value as 2,
In normal applications, this value should set to 0 or 1, the default value is 1.
◆
Databit, Parity, Stopbit
