at指令错误码-指令详解

短信猫常用基本AT指令 AT+SPEAKER=0//默认但是可能声音会小 AT+SPEAKER=1//可以 ..... at+vtd= 调dtmf AT+CFUN= 0, modem不可以打电话，发短信，但是可以有其他操作，比如读 sim卡之类的。 AT+CFUN= 1, modem 可以打电话，发短信...所以叫做full functionality What is +CMS, and +CME Errors? +CMS Errors are returned from the SMSC. +CME Errors are generated by the GSM devic