I am a professional security system consultant with more than 08 years of experience in designing the electronics security systems
Note: Please clarify the following
a) what type of security system design you want e.g. CCTV, Access control or Intrusion Alarm
b) Do you require one system of all of the above
c) Design is subject to the products that you are going to use.
We are a professional security assessment firm. What kind of security system are you looking to complete with a raspberry pi? Is it just the pi, or do you have add-ons, or shields that will interface with the GPIO? Which pi are you using?