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11
7. AT Command
1.
Directive format:
<CMD>[op][ para1, para2, para3,…] <CR><LF>
: Command prefix
CMD: Controls the indicator
(op): The instruction operator. It can be:
""
“?” : Represents the current value of the query parameter.
"":Indicates the execution of the instruction.
“=? ” : Represents the parameters of the query setup instruction.
Para-n: Represents the value of the set parameter, or specifies the parameter to query
< CR><LF >: return line break, ASCII 0x0D 0x0A