Replacing wired switch by bluetooth switch

[Olivier Scalbert]

Hi,

I am working on a project where there are moving devices. Devices can only move if a wired button is pressed. In fact, for security reasons, there are two buttons connected in series to a PCL.

We would like to replace the wired connection by a bluetooth connection, that is why we are looking around about the nRF51822. We have several constraints:

• there are several sets of (switch, moving device). They are not at the same location, but it is mandatory that a remote switch is dedicated to one moving device and one only !
• safety: communication should be safe and encrypted to avoid hacks;
• low energy aspects for the switch side.

Any info or pointers to ideas, design patterns that can be used for this project would be greatly appreciated !!!

Thanks in advance !

Olivier

[Ole Morten]

This sounds fairly similar to the LedButton application that is part of nAN-36. Have you had a look on it?

However, if you don't actually require Bluetooth low energy functionality, you may be just as well off by using Gazell. This is very similar to the keyboard use case that Gazell is optimized for. There are examples for Gazell available as part of the nRF51 SDK, including ones that use encryption and dynamic pairing. You can also take a look at the Gazell documentation online here.