Utilization of Atmega328 PIR and Microcontroller Sensors to Improve CCTV Online Performance

A device that can increase security against theft has been made, thus reducing public anxiety to leave their home when the house is empty, especially for a long time. Online CCTV that has been equipped with a PIR sensor, ATmega328 microcontroller, and SIM800L and ISD1820 sound module. The advantages of this system that has been made to have the advantage that not only can be monitored through the monitor screen but can also be seen through a smartphone, another advantage is that the homeowner can prevent theft because the device is equipped with an alarm, if there is movement detected by the PIR sensor in the room, SIM800L will send an SMS that says "There is a movement" to the cell phone number already in the program with the SMS received by the recipient, the homeowner can see whether the movement is a thief or not, if the incoming person is a thief then the SMS recipient can send an SMS reply " on "to turn on the speaker and buzzer. If you want to turn off Buzzer, the homeowner can send an SMS "off".