At Command - Ebyte E840-TTL-4G02E User Manual

Chengdu Ebyte Electronic Technology Co.,Ltd

3. AT command

a)Command format：
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：
c)Command set：
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AT+<CMD>[op][ para1, para2, para3,...]<CR><LF>
Error code
-1 Invalid command format
-2
-3
-4
-5
REBT restart module
VER inquire version No.
INFO inquire device info.
EXAT exit AT command mode
Description
Invalid command
Invalid operator
Invalid parameter
Operation prevented
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