https://devzone.nordicsemi.com/f/nordic-q-a/49741/how-to-add-ble-central-on-mqtt-sample-code-in-the-nrf-connect-sdkhi all , now , i need add create mqtt ble gateway . it compiler failed follow message : C:/temp/ncs/zephyr/drivers/serial/uart_nrfx_uarte.c:1272:9: error: &#39;DT_NORDIC_NRF_UARTE_UART_2_LABEL&#39; undeclared here (not in a function); did you mean &#39;DT_NORDIC_NRF_UARTE_UART_1_LABELen-USTelligent Community 13Tue, 16 Jul 2019 02:24:18 GMThttps://devzone.nordicsemi.com/thread/198578?ContentTypeID=1Tue, 16 Jul 2019 02:24:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ad06fee5-d786-42ad-967a-ebe50809f57bstevenlin<p>hi Didrik,</p> <p>thank you for help .</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/198323?ContentTypeID=1Mon, 15 Jul 2019 07:41:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:80abd102-fa1d-4b46-9dd3-ac7c873e3630Didrik Rokhaug<p>Hi.</p> <p></p> <p>In addition to the configuration options in prj.conf you also need to include the nrf9160_pca10090ns.overlay and child_secure_partition_manager.conf files from the lte_ble_gateway sample in your project.</p> <p></p> <p>The overlay file describes the hardware, and tells the UART driver how to configure the&nbsp;UART2 peripheral, while the configuration file tells the secure partition manager to configure the UART2 peripheral to be used from your non-secure application.</p> <p></p> <p>Best reagrds,</p> <p>Didrik</p><div style="clear:both;"></div>