Hi All,
I would like to make a replacement secure RF "key fob" type remote control for an exisiting intruder alarm system. This needs a few functions e.g. arm, disarm, part arm, open garage door etc. Interfacing to the exisiting alarm is no problem.
I had an idea to use two Bluetooth LE equipped MCUs e.g. ESP32. I am thingking that once the pairing has taken place, the encrypted data flow between the two MCUs should be pretty secure. I believe that the two devices can be "bonded" which means that no "in the clear" communication takes place as the pairing information is a one time thing only.
Does this sound feasible? Or are there securty flaws in my cunning plan?
Thanks for any advice.