How to hide UUID Beacon in ADV Mode?

[Paolo A.]

Hello everyone, I want to know and how, if it is possible, to hide UUID Beacon string during the advertising mode. My goal is to not show the UUID by any sniffer, like Master Control Panel (e.g.).

Thanks, Paolo

[Petter Myhre]

What do you mean by hide? Could you explain a bit more about your use case? You can remove the UUID from the advertising packet, if that is what you are asking.

[Paolo A.]

Hi Petter, thank you for reply. I want to make sure that UUID beacon string is transmitted in adv mode but it isn't visible by MCP, or it is visible but with another UUID number. The goal is does not making available the UUID number to the user. I hope I was more clear. Thanks, Paolo

[Petter Myhre]

If the UUID is included in the advertising packet it will be visible.

[Paolo A.]

That's right! But I want to know if there is a method to make it invisible, for security. My idea is to send the correct UUID, then modify it (e.g. random UUID) and send the new UUID again. From APP side (smartphone) I'll receive the UUID string but only one is right, the others is wrong. My APP understand which is the correct UUID and handle the information. My goal is to use beacon like Eddystone EID....or similar to it Now I use SDK 6.1.0 and SD7.0.0, is it possible generate random numbers? Thanks, Paolo

[Petter Myhre]

You can change the content of the advertising packet whenever you want. You can generate random numbers with sd_rand_application_vector_get()