Chengdu Ebyte Electronic Technology Co.,Ltd
E840-TTL-4G02E User Manual
Copyright ©2012–2019,
Chengdu Ebyte Electronic Technology Co.,Ltd
17
3. AT command
a)Command format
:
AT+<CMD>[op][ para1, para2, para3,…]<CR><LF>
AT+
:
command front end
CMD
:
control command
[op]
:
“=” indicates parameter configuration
“NULL”indicates parameters inquire
[para-n]
:
parameter list
<CR><LF>
:
CRLF
,
ASCII 0x0D 0x0A
b)Command error code
:
Error code
Description
-1
Invalid command format
-2
Invalid command
-3
Invalid operator
-4
Invalid parameter
-5
Operation prevented
c)Command set
:
REBT
restart module
VER
inquire version No.
INFO
inquire device info.
EXAT
exit AT command mode