Event received by BLE peripheral device when server requests to read from characteristic

RE: Event received by BLE peripheral device when server requests to read from characteristic

bjorn-spockeli — Fri, 23 Nov 2018 07:50:27 GMT

Happy to help!

RE: Event received by BLE peripheral device when server requests to read from characteristic

Vineet Wadke — Fri, 23 Nov 2018 04:08:53 GMT

I am able to capture BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST and update the characteristic value at that event. Just gone through some BLE service source codes in SDK. Also most of topics are already discussed on DevZone, so gone through it also. Thanks a lot Bjorn 🙂

RE: Event received by BLE peripheral device when server requests to read from characteristic

Vineet Wadke — Fri, 12 Oct 2018 09:42:30 GMT

Thanks a lot. :-)

I will go through it.

RE: Event received by BLE peripheral device when server requests to read from characteristic

bjorn-spockeli — Fri, 12 Oct 2018 09:17:38 GMT

Read Requests are used in the QWR module which is included in most of the BLE peripheral examples.

RE: Event received by BLE peripheral device when server requests to read from characteristic

Vineet Wadke — Fri, 12 Oct 2018 08:32:41 GMT

Thanks a lot Bjorn for your response. I will evaluate the use of same for my development.

Is there any example code or implemented service source code in Nordic SDK which uses GATTS Read Request with Authorization?

RE: Event received by BLE peripheral device when server requests to read from characteristic

bjorn-spockeli — Fri, 12 Oct 2018 08:18:14 GMT

Yes, you can achieve the behavior you are looking for by using Read requests with authorization, see the S132 SoftDevice v6.0.0: GATTS Read Request with Authorization Message Sequence Chart for the event handling flow. You basically have to handle the BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST event, which in your case will be to query the host device over UART and then call sd_ble_gatts_rw_authorize_reply with the value received from the host.

Best regards

Bjørn

RE: Event received by BLE peripheral device when server requests to read from characteristic

Vineet Wadke — Fri, 12 Oct 2018 06:41:19 GMT

I got some hints in this link. Some more information will be great.