Do I need a door contact and pir and keypad

[RobTi]

Hi I have a half glass upvc door which opens straight onto a staircase up to my hall (live in upstairs flat), behind door is my old remote keypad, I also had a door contact for my old wooden door and a pir at the top of the stairs pointing down at the door. So if I was to fit a new system and I have to start here what would you recommend as I fitted all this 30 years back with a city electrical kit ?
Thanks

 

[secureiam]

The question would be hows it wired?

pictures may help, identify the units involved and how it maybe wired.

 

[RobTi]

Sorry I’m starting from scratch but need to get the wiring in atm as I’m lowering ceilings, so just need to know if in this day and age do I still need them ?
Thanks

 

[RobTi]

Okay update with pics, looking down to front door, up from front door existing keypad and top landing. Have access to use a wired system and the old one had pir pointing down to door a door contact and a pir in top landing covering the bathroom door. So if I was fitting new what sensors for the stairs front door would I use and would I fit a keypad downstairs.
Thanks

 

[sparkymarka]

If it was my flat I would fit a keypad at the bottom of the stairs , door contact and a pir , plus a keypad at the top of the stairs ....plus what ever was required upstairs

 

[RobTi]

Thanks my plan was door contact at the bottom of the stairs, pir pointing down the stairs and never thought about a keypad at the top( used to have an open area at the landing with control unit with built in keypad )
Okay for just the above recommend me a kit or what ever including bell box/siren or what make to go for and some way to alert me smart phone ?
Thanks