1、　　功能描述：
超声波实现防盗测距，以四个led灯显示逐渐靠近的距离。当距离近到4灯全亮时蜂鸣器报警。
RFID实现刷卡开锁功能，刷卡同时系统会在Flash中读取验证卡号是否合法，并将刷卡卡号同当前时间及是否合法的标记存入Flash中。
OLCD上显示蓝牙连接状态，当前刷卡卡号，是否有火，是否有可燃气体，超声波测距距离，以四格显示。
HC-05实现与手机的蓝牙通信，通过上位机发送指定命令，查询当前时间、温度、湿度、火焰、刷卡记录及可燃气体状态，并可以通过命令修改系统时间，清空刷卡记录。(1. Functional Descr iption:
The ultrasonic wave is used to measure the distance from the four LED lights. The buzzer alarm when the distance is close to 4 lights.
RFID realizes the function of swiping card to unlock. Meanwhile, the system will read the verification card number in Flash. It will also store the credit card number with the current time and whether the legal label is in Flash.
OLCD display Bluetooth connection status, current card card number, whether there is fire, flammable gas, ultrasonic distance distance, with four lattice display.
HC-05 realizes Bluetooth communication with mobile phone, sends the specified command through the upper computer to inquire about the current time, temperature, humidity, flame, credit card record and flammable gas state, and can modify the system time by command, and clean up the credit card record.)