https://devzone.nordicsemi.com/f/nordic-q-a/92465/nrf9160-uart1Hi，I have a question: 1.I use device_ get_ Binding (&quot;UART_1&quot;) When UART1 is opened, ENXIO returns to 134. How do you solve this problem? For others, I used uart0, spi2, spi3.en-USTelligent Community 13Fri, 30 Sep 2022 13:33:08 GMThttps://devzone.nordicsemi.com/thread/388797?ContentTypeID=1Fri, 30 Sep 2022 13:33:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a2d70f58-e43d-47c0-bcc4-ab8a0b1208f3Vidar Berg<p>Hi,</p> <p>The UART driver has three different API types as noted in the documentation here: <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.1.0/zephyr/hardware/peripherals/uart.html">https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.1.0/zephyr/hardware/peripherals/uart.html</a>, and if you try to use an API type that has not been enabled (see config settings <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.1.0/zephyr/hardware/peripherals/uart.html#configuration-options">here</a>), then it will return with -134 / (-ENOTSUP).</p> <p>Could you let me know the function that returns ENOTSUP?</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>