Hey guys, I am new to using an arduino and I have a project to do for college which I am struggling with. I need to make an alarm system using an ultrasonic sensor, speaker, keypad and an LCD or processing.
So far I have only found a few sketches online and I am finding it difficult to put everything together. I would like some help with the coding and ideas on how to approach this.
Basically the alarm system should be like this: when you enter the house the ultrasonic sensor detects but doesn't sound the alarm so you have time to put in the code and deactivate it and when you activate it, gives 30 seconds to leave the house and doesn't go off straight away.