BLE nrf52832 SDK11 characteristic update with every read operation

RE: BLE nrf52832 SDK11 characteristic update with every read operation

Petter Myhre — Fri, 21 Jul 2017 11:01:29 GMT

If you set ble_attr_md.rd_auth = 1; for the characteristic value that you want to support authorization, you should get a BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST event every time it is read. Then you have to reply to the event with sd_ble_gatts_rw_authorize_reply().

RE: BLE nrf52832 SDK11 characteristic update with every read operation

anuja — Fri, 21 Jul 2017 10:51:45 GMT

Thanks peter but for this MSC which data structure should be implemented.will ble_gatss_rw_authorize_request work? so that on every read of characteristic the value should be updated.?

RE: BLE nrf52832 SDK11 characteristic update with every read operation

Petter Myhre — Fri, 21 Jul 2017 10:38:16 GMT

Sounds like read request with authorization is what you are looking for, see this MSC.

You need to enable authorization for the characteristic value. See this.

RE: BLE nrf52832 SDK11 characteristic update with every read operation

endnode — Fri, 21 Jul 2017 08:47:54 GMT

Sorry but that doesn't make sense. GATT Read (not Read Request) doesn't invoke any event on GATT Server side so the serve doesn't know you read the value and so it hardly can determine when to change it internally. Use Read Request or Write/Notify architecture.