Moreover, as a justification for this reasoning is the fact that it is required to scan the columns for the pressed key and then scan the rows and the results will be decode
d in a decoder telling us which button of the keypad was pressed. The main functionality of the keypad as mentioned earlier is to set the code. The alarm can be armed and disarmed with a standard four digit user code in our case. The master code is a step above a regular user code. It is used to unlock the system, as well as programming or erasing a regular user code. Theoretically it can also be used to bypass some sensors. The default password set during the design, which is also the installation code, is 1234. Most alarm companies use the same installer code for all of their
installations, and the vast majority will never give their installer code to a customer, for obvious reasons. As soon as we connect the 5V power source the alarm greets us with a welcome message displayed on the LCD then asks us to provide the password. Once entered correctly the green LED flashes accepting the code. If the password entered was incorrect the red LED flashes and the system gives you two further chances to enter the correct password.
It all depends on your home’s security needs. But bear in mind that if danger is detected, professional monitoring services will contact you first if a sensor is triggered. After the security provider has reached out to you and any emergency contacts they’ll contact the police on your behalf. So, the lag time between the triggered sensor and emergency responders getting to your home could be lengthy. On the other hand, unmonitored home security systems will automatically notify you directly when a sensor is triggered. Once you’re notified, you’ll have to determine whether or not it’s a false alarm or if you should call emergency services.
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This is particularly the case given that it is the said physical security that presents the most serious obstacle to an attacker seeking to execute a break in.