密码锁定位报警防盗系统，用GPRS+GPS+51单片机开发的密码锁防盗系统，有密码锁功能，密码输入错误会报警，同时会用GPS定位，同时GPRS会将经纬度发送到指定手机上。-Anti-theft alarm system password lock bit, single-chip developed by GPRS+GPS+51 lock anti-theft system with password lock function, password input error alarm, and