USR IOT USR-GPRS232-730 User Manual

USR-GPRS232-730 User Manual h.usriot.com
Jinan USR IOT Technology Limited / 45 www.usriot.com
23
The format of query
Command string: <AT+>[CMD][OP][PARA]<CR>
Type of command
Type
Command string
Description
0
AT+{CMD}?{CR}
execute the command or query current
parameter value
1
AT+{CMD}=?{CR}
query the value range or type
2
AT+{CMD}{CR}
execute the command or query current
parameter value
3
AT+{CMD}={PARAM}{CR}
set the value of parameter
The format of reply
There are two kinds of response, with or without echo.
All the followings are using without echo as examples.
Command string: [CR][LF][+CMD][OP][PARA][CR][LF]<CR><LF>[OK]<CR><LF>
Code
Meaning
Necessary
AT+
AT command head
Yes
CMD
function of command
Yes
OP
operator, example: =, ?, =?
No
PARA
parameters
No
CR
carriage return, end of command
Yes
Code
Meaning
Necessary
CR
carriage return
No
LF
line feed
No
+CMD
response head
No
OP
operator
No
PARA
parameter
No
CR
carriage return
No
LF
line feed
No
CR
carriage return
Yes
LF
line feed
Yes
OK
operating successful
No
CR
carriage return
Yes
LF
line feed
Yes

USR IOT USR-GPRS232-730 Specifications

General

Brand	USR IOT
Model	USR-GPRS232-730
Category	Modem
Language	English