GPRS DTU User Manual V1.3
http://en.usr.cn
Jinan USR IOT Technology Limited
Page 23 of 31
6. AT Command
AT+ command use command line that based on ASCII code, command format as follows:
<CR> <LF> means carriage returns, line feeds
<CR> means “\r”, decimal ASCLL code is 13, hexadecimal code is 0x0D;
<LF> means '\n', ASCII code is 10, hexadecimal is 0x0A
<CR> <LF> means Carriage return, line feed. Pls input carriage returns and line feed but
not those characters.
6.1.Set Key Parameter
1. Set DTU APN account (Default: Mobile CMENT)
Send
AT+CSTT=<apn><CR><LF>
Note: <apn> is character string
return
<CR><LF>OK<CR><LF>
For example:
China Unicom: AT+CSTT="UNINET"<CR><LF>
China Mobile: AT+CSTT="CMNET"<CR><LF>
