How to update the UUID's value when user press "download" button in UUID.

RE: How to update the UUID's value when user press "download" button in UUID.

Andy — Fri, 29 Mar 2019 10:41:14 GMT

Could you verify my answer if I answered your question? :)

RE: How to update the UUID's value when user press "download" button in UUID.

Andy — Fri, 29 Mar 2019 10:28:26 GMT

Cool! Happy to help :)

RE: How to update the UUID's value when user press "download" button in UUID.

Roger — Fri, 29 Mar 2019 10:18:31 GMT

Andy, Thanks again! your suggestion is very helpful.

I referred to below 2 pages and found a workable solution.

https://devzone.nordicsemi.com/f/nordic-q-a/19447/sd_ble_gatts_rw_authorize_reply-returns-error-s132

https://devzone.nordicsemi.com/f/nordic-q-a/24068/sd_ble_gatts_rw_authorize_reply-not-working

RE: How to update the UUID's value when user press "download" button in UUID.

Roger — Fri, 29 Mar 2019 09:09:45 GMT

Andy, Thanks for your reply.

your assuming is right. I will try the Authorization for characteristics as your suggestion. hope it can help me. I will reply the result late.

RE: How to update the UUID's value when user press "download" button in UUID.

Andy — Fri, 29 Mar 2019 09:00:39 GMT

What do you mean with updating the UUID's value? And what do you mean with downloading? What down arrow?

I'm assuming that you're talking about reading a characteristic's value with nRF Connect (?).

If that's what you want to do, I'd advise you to enable and implement handling of Read Requests with Authorization for the characteristics that you want to behave like that. This allows you update the value of the characteristic on each read (see MSC here).

If you really want to update the UUID then I don't really know if that's possible without actually changing the GATT table and implementing the Service Changed notification thing.