https://devzone.nordicsemi.com/f/nordic-q-a/24219/porting-code-from-s332-v2-0-to-v4-0-ble_error_no_tx_packetsWith version v2.0 of S332, I checked for a return of BLE_ERROR_NO_TX_PACKET when using the ble_nus_string_send function. I use this test in a routine which writes buffers larger than 20. When I ported to v4.0 of S332 I see that BLE_ERROR_NO_TX_PACKETen-USTelligent Community 13Thu, 10 Aug 2017 09:11:42 GMThttps://devzone.nordicsemi.com/thread/95355?ContentTypeID=1Thu, 10 Aug 2017 09:11:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e24825e4-b52c-42ee-9b0a-6a9c9a30444bRoss Belloni<p>Thanks Sigurd!</p> <p>Ross</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/95354?ContentTypeID=1Thu, 10 Aug 2017 07:52:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8b5f0d9e-e470-46ee-a2b7-7c01f63f9109Sigurd<p>Hi,</p> <p>In S332 v4.0, <code>BLE_ERROR_NO_TX_PACKETS</code> has been replaced by <code>NRF_ERROR_RESOURCES</code>.</p> <p>The application packet concept has been replaced with a dedicated transmission queue for Handle Value Notifications. The number of Handle Value Notifications that can be queued is configured by <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s332.api.v4.0.2/structble__gatts__conn__cfg__t.html?cp=2_3_3_0_0_2_5_4_0">ble_gatts_conn_cfg_t::hvn_tx_queue_size</a>. When the queue is full, the <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s332.api.v4.0.2/group___b_l_e___g_a_t_t_s___f_u_n_c_t_i_o_n_s.html?cp=2_3_3_0_0_2_5_2_4#ga313fe43c2e93267da668572e885945db">sd_ble_gatts_hvx()</a> function will now return <code>NRF_ERROR_RESOURCES</code>. <code>BLE_ERROR_NO_TX_PACKETS</code> / <code>BLE_ERROR_NO_TX_BUFFERS</code> is no longer used. A <code>BLE_GATTS_EVT_HVN_TX_COMPLETE</code> event will be issued as soon as the transmission of the notification is complete</p><div style="clear:both;"></div>