https://devzone.nordicsemi.com/f/nordic-q-a/84479/how-to-use-the-qwr-moduleHi Nordic, how can i use the QWR module on the ble_nus_uart peripheral example? In the example we use nrf_ble_qwr_init() to initialize the module but i don&#39;t get the effect of it. I want to use it because i need to transmit data as fast as possibleen-USTelligent Community 13Tue, 08 Feb 2022 11:41:17 GMThttps://devzone.nordicsemi.com/thread/351764?ContentTypeID=1Tue, 08 Feb 2022 11:41:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fa1bd337-5e6f-42a6-89c1-671a4bc7c5c2ovrebekk<p>Hi</p> <p>The QWR module is only used for write requests, not write commands. The reason for this is that the Bluetooth stack can only handle one write request at a time, and if you want to send multiple of them it is necessary to queue them in the application.&nbsp;</p> <p>The ble_nus_data_send() functions uses notifications, which is a type of command and not request, and as such the QWR module is not relevant.&nbsp;</p> <p>In order to maximize throughput using notifications it is necessary to upload as many packets as you can until the NRF_ERROR_RESOURCES error is returned, and then hold off until the&nbsp;<span>BLE_GATTS_EVT_HVN_TX_COMPLETE event occurs, at which point you can upload more notifications to the stack.&nbsp;<br />For more context on this please refer to <a href="https://devzone.nordicsemi.com/f/nordic-q-a/35125/how-to-deal-with-nrf_error_resources">this case</a>.&nbsp;</span></p> <p><span>Best regards<br />Torbjørn</span></p><div style="clear:both;"></div>