1、数据态和 AT 态的切换通过串口实现 AT 态和数据态的无缝切换目前只有 GPRS 模块支持+切换，其他的都不支持。切换到 AT 态发短信，然后再次切换回来。定时上下线的原理剖析远程配置当用从中心通过网络链路来使 IP modem 进入配置状态，可以发送如下字符*COMMIT CONFIG*设备接收到这个字符后，就进行配置状态了。对于状态切换过程设备的缓冲是否被情况问题的分析：当链路断开，或者 at+reset 导致重启时，设备都是断电重启，保持在 RAM 中的数据将丢失。F2103 设备如果遇到网络不好，或掉线的情况，目前的机制是，联系重连五次，然后断电重启，一直持续到指定的重连次数后休眠一
2、阵子又重新重连了。System started!Press s key continuously to enter configure program.Now start at proc.At Proc Success!Ppp dial succ, Got Ip Addr :10.87.246.192Resolving server name:120.42.46.98.Connect to 0 120.42.46.98:3004 .Connect error.connect errorNow start at proc.At Proc Success!Ppp dial succ, Got Ip
3、 Addr :10.88.245.194Resolving server name:120.42.46.98.Connect to 0 120.42.46.98:3004 .Connect error.connect errorNow start at proc.At Proc Success!Ppp dial succ, Got Ip Addr :10.88.169.83Resolving server name:120.42.46.98.Connect to 0 120.42.46.98:3004 .Connect error.connect errorNow start at proc.
4、At Proc Success!Ppp dial succ, Got Ip Addr :10.87.255.223Resolving server name:120.42.46.98.Connect to 0 120.42.46.98:3004 .Connect error.connect errorNow start at proc.At Proc Success!Ppp dial succ, Got Ip Addr :10.88.207.192Resolving server name:120.42.46.98.Connect to 0 120.42.46.98:3004 .Connect error.connect errorResetting .厦门四信 刘明德2010-11-24
