https://devzone.nordicsemi.com/f/nordic-q-a/71036/pc-ble-driver-how-to-increase-the-gatt-connect-linkHi Nordic Team, Currently, i develop a software for fitting our application. Env: Windows10, Controller: 52832 SDK: PC-Ble-Driver. SDK Link: NordicSemiconductor/pc-ble-driver: Desktop library for Bluetooth low energy development (github.com) en-USTelligent Community 13Mon, 01 Feb 2021 07:58:43 GMThttps://devzone.nordicsemi.com/thread/292127?ContentTypeID=1Mon, 01 Feb 2021 07:58:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a0daf34d-5883-4699-8d1b-081aed7ac25cTimCheng<p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1612166314684v1.png" alt=" " /></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/291792?ContentTypeID=1Thu, 28 Jan 2021 13:04:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:61ce122c-c7e3-4724-8836-d3459e79fb84TimCheng<p>After setting as below, it report 18,NRF_ERROR_CONN_COUNT</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/291767?ContentTypeID=1Thu, 28 Jan 2021 11:46:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d9978a0c-ff48-4711-b4ec-f93a8d4aec13TimCheng<p>static uint32_t ble_cfg_set(uint8_t conn_cfg_tag)<br />{<br /> const uint32_t ram_start = 0; // Value is not used by ble-driver<br /> uint32_t error_code;<br /> ble_cfg_t ble_cfg;</p> <p>// Configure the connection roles.<br /> memset(&amp;ble_cfg, 0, sizeof(ble_cfg));</p> <p>ble_cfg.gap_cfg.role_count_cfg.adv_set_count = 1;//BLE_GAP_ADV_SET_COUNT_DEFAULT;<br /> ble_cfg.gap_cfg.role_count_cfg.periph_role_count = 0;<br /> ble_cfg.gap_cfg.role_count_cfg.central_role_count = 3;//MAX_PEER_COUNT;<br /> ble_cfg.gap_cfg.role_count_cfg.central_sec_count = 0;</p> <p>error_code = sd_ble_cfg_set(tuya_ble_port_adapter, BLE_GAP_CFG_ROLE_COUNT, &amp;ble_cfg, ram_start);<br /> if (error_code != NRF_SUCCESS)<br /> {<br /> tuya_printf(&quot;sd_ble_cfg_set() failed when attempting to set BLE_GAP_CFG_ROLE_COUNT. Error code: 0x%02X\n&quot;, error_code);<br /> return error_code;<br /> }</p> <p>memset(&amp;ble_cfg, 0x00, sizeof(ble_cfg));<br /> ble_cfg.conn_cfg.conn_cfg_tag = conn_cfg_tag;<br /> //ble_cfg.conn_cfg.params.gap_conn_cfg.conn_count = 3;//MAX_PEER_COUNT;<br /> ble_cfg.conn_cfg.params.gatt_conn_cfg.att_mtu = 247;</p> <p>error_code = sd_ble_cfg_set(tuya_ble_port_adapter, BLE_CONN_CFG_GATT, &amp;ble_cfg, ram_start);<br /> if (error_code != NRF_SUCCESS)<br /> {<br /> tuya_printf(&quot;sd_ble_cfg_set() failed when attempting to set BLE_CONN_CFG_GATT. Error code: 0x%02X\n&quot;, error_code);<br /> return error_code;<br /> }</p> <p>return NRF_SUCCESS;<br />}</p><div style="clear:both;"></div>