Hi can I buy the security keypad and motion detector and pair it with my 2c camera home base
Yes you can, as long as you have Homebase 2. Some of the other homebases support keypads and motion sensors, but not sure which support which. Homebase 2, which comes with 2C cams supports everything currently on the homebase ecosystem. I bought a doorbell and homebase 2 first then added cameras, sensors, and keypads and I’m happy with my system 18 devices.