RE: Question about "Queued Writes module"

Vyacheslav Lebets — Fri, 14 Dec 2018 08:34:18 GMT

Thanks, Einar !!!
The question was asked for a reason.
When switching to SDK 15 from 12.3, we encountered some problems in GATT.
I hope that using this module will solve the problems.

Thanks for answer!

Best regards, Vyacheslav.

RE: Question about "Queued Writes module"

Einar Thorsrud — Fri, 14 Dec 2018 08:26:20 GMT

Hi,

Yes, the module is needed even if it is not initialized. All BLE examples started using the Queued write module in SDK 15.0.0. In earlier SDK examples the peer could cause and assert by issuing long writes which was not handled by the application. Using the queued write module with NRF_BLE_QWR_MAX_ATTR = 0 fixes this issue.

From SDK 15.0.0 release notes:

BLE examples changed to use the Queued Write module (nrf_ble_qwr). Applications must explicitly configure characteristics to accept long writes. See app_ble_qwr for an example of this. This fixes a problem where peers could cause our devices to assert by issuing long writes.