单片机stc89c52与GSM（sim300）模块进行，具体内容是用手机给GSM发送a0#(注：‘#’是英文字符，不是中文字符)，GSM会控制单片机启动一个继电器，同时单片机返回“qi dong”发送给GSM模块，GSM发送短信给指定手机号；用手机发送a1#，继电器会关闭，同时发送“guan bi”给指定手机号。一共可以控制三个继电器分别是用短信内容为a0#,a1#,b0#,b1#,c0#,c1#控制通断（“0”为通“1”为断）-SCM stc89c52 and GSM (sim300) modules, specific content is sent using a mobile phone to GSM a0# (Note:　#　is the English characters, not Chinese characters), GSM will start a relay to control the microcontroller, while the microcontroller returns　qi dong　send to a GSM module, GSM mobile phones to send text messages to a specified number　using a mobile phone to send a1#, the relay will be closed while sending　guan bi　to the designated phone number. A total of three relays can be controlled separately with the message content for a0#, a1#, b0#, b1#, c0#, c1# control off ( 0　through　1　for the break)