Where does the UUID come from?

[la-ble]

I just tested putting the same firmware on two different nRF51822s and inspected them with this test app.

They show two different UUID's.

I can find no macro to modify in the example firmware project. Where does this UUID come from? And can I read it at run time?

[Bill Siever]

Each iOS device generates its own unique UUID for each peripheral (Bluetooth Low Energy device) that connects to it. (Maybe it is some hash of both the bluetooth device's address and a unique identifier on the iOS device)

A UUID can be used by apps to keep track of connections and reconnections to a specific bluetooth low energy device, but the device will have a different UUID on each iOS device.

This question may be better answered on other forums. I believe there are a few threads about it on StackOverflow and the Apple Developer Forums.

[la-ble]

So I should not have issues putting the same firmware on multiple devices? I'm trying to understand how this might also play into a need to serialize devices during assembly.

[Petter Myhre]

You should not have any issues with that. Please also see this.