<P 0cm 0cm 0pt 57.75pt; TEXT-INDENT: -36pt; mso-list: l1 level1 lfo2; tab-stops: list 57.75pt"><FONT face="Times New Roman"><B normal">一、 </B><B normal">AT</B></FONT><B normal">命令说明</B><B normal"><p></p></B></P><P 0cm 0cm 0pt 21.75pt"><FONT face="Times New Roman"> AT</FONT>命令的格式如下:<p></p></P><P 0cm 0cm 0pt 21.75pt"><p><FONT face="Times New Roman"> </FONT></p></P><P 0cm 0cm 0pt 21.75pt"><v:shapetype><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path connecttype="rect" gradientshapeok="t" extrusionok="f"></v:path><lock aspectratio="t" v:ext="edit"></lock></v:shapetype><v:shape><v:imagedata><FONT face="Times New Roman"></FONT></v:imagedata></v:shape><FONT face="Times New Roman">AT</FONT>命令的形式一共有四种,分别叙述如下:<p></p></P><P 0cm 0cm 0pt 36.75pt; TEXT-INDENT: -15.75pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt">1. 无参数命令。它是一种单纯的命令,格式是<B>AT[</B><B>+</B><B>|&]<command></B>,如开机、显示当前设置列表等:<BR clear=all>AT+ON、AT&V …<p></p></P><P 0cm 0cm 0pt 36.75pt; TEXT-INDENT: -15.75pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt">2. 查询命令。它用来查询该命令当前设置的值,格式是<B>AT[</B><B>+</B><B>|&]<command>?</B>,如:<BR clear=all>AT+CSCA?<p></p></P><P 0cm 0cm 0pt 36.75pt; TEXT-INDENT: -15.75pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt">3. 帮助命令。它是用来列出该命令的可能参数,格式是<B>AT[</B><B>+</B><B>|&]<command>=?</B>,如:<BR clear=all>AT+CMGL=?<p></p></P><P 0cm 0cm 0pt 36.75pt; TEXT-INDENT: -15.75pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt">4. 带参数命令。它是应用最广的一种格式,它为命令提供了强大的灵活性,格式是<B>AT[</B><B>+</B><B>|&]<command>=<par1>,<par2>,<par3>…</B><p></p></P><P 0cm 0cm 0pt"><p> </p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0">作为返回值,其情况就比较多样,这在后面的命令详解中将具体给出。但是返回值还是遵循一个大的框架格式:<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0"><CR><LF><回应字串><CR><LF><OK/ERROR>[: ERROR信息]<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0">如上面的命令对应的信息回应为:<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0"><CR><LF>TTP Communications Ltd<CR><LF><p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0"><CR><LF>GSM Mobile Station<CR><LF><p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0"><CR><LF>Revision: (Date: Jan 21 2003, Time: 12:05:26)<CR><LF><p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0"><CR><LF>+CLIP: 0,1<CR><LF><p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0"><CR><LF>+CFUN: (0,1,4),(0-1)<CR><LF><p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0"><CR><LF>+CNUM: "","07813020249",129,7,4<CR><LF><p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0"><CR><LF>OK<CR><LF><p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0">其中最后一行为最后返回结果码。<p></p></P> |