Feasycom FSC-BT691 - AT Command Part; AT Command Specification

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5. AT Command Part
5.2 Specification
Applies to the entire document:
l { } ：The content included in {...} is optional
l << ：The content after << represents the COMMAND sent by the host to the module
l >> ：The content after >> means the RESPONSE of the module to the host
5.2.1 Command format
AT+ Command {=Param1{, Param2{, Param3...}}} <CR><LF>
l All commands start with "AT" and end with <CR><LF>
l <CR> stands for carriage return character, corresponding to ascii hex is 0x0D
l <LF> stands for newline character, corresponding to ascii hex is 0x0A
l If the command contains parameters, the parameters should be located after "="
l If the instruction contains multiple parameters, the parameters should be separated
by ","
l If the command returns with a response, the response starts with <CR><LF> and
ends with <CR><LF>
l The module should always return the result of the instruction execution (return
"OK" on success, and "ERROR" on failure)
e.g.
1. Read Local Name
<< AT+NAME
>> +NAME=Feasycom
>> OK
2. Write unsupported Uart Baudrate
<< AT+BAUD=0
>> ERROR
5.2.2 Notification format
<CR><LF>+ Indication {=Param1{, Param2{, Param3...}}} <CR><LF>
l All notifications start with <CR><LF> and end with <CR><LF>
l If the notification contains parameters, the parameters should be placed after "="