20/5/2020

you a person in the rental house will be afraid??????? girls , anyway I'll, shivering. JPG
From residential room moved to the apartment room, originally Shared five people, save a handful of key to room there, because I just left, most of all a person stay in the room to review, girls less daring, a bit of trouble, will all kinds of lenovo scary scenes, day the day before yesterday, a person at home, someone you hold the key to open our door, opened several times, I dared to ask, is who ah, is a male voice, said the man with the key, and went away!!!!!! Immediately tell roommate in the work, she said yesterday is only a can, and the landlord said key may indeed be to go with the key, a few hours later, someone knocked at the door, saying is send keys, I took to come in, then open the door though is a false alarm, but must guard against,
So I wanted to do something, using skills learned drew up a preliminary plan:
door switch monitor system
In gate card a button, connected to the single chip microcomputer (just one piece of STM32), single chip microcomputer can record the opening and closing time and the number of times to flash, another key (hidden), the first man in the door or the last person to go out, can pass the case tell MCU tenant status at home, it is can stop/start monitoring, if there is illegal to go out into the new record, when the first man in the door, would call the police, and displayed on the LCD display illegal record, also can through the button to view the next article, on a record,
Preparation: STM32 development board, LCD display, mechanical keys, buzzer

add features: home have a roommate company send birthday gift: camera, can be real-time monitoring by mobile phones, when detect unauthorized access to, can be sent via wifi remote signal, no matter what way through, remind roommates view monitoring camera,
But involves the wifi remote transmission signal, this and I'm still not completely, support a move has the understanding friend can help me. ^ ^