https://devzone.nordicsemi.com/f/nordic-q-a/93831/nrf9160-restarts-due-to-adding-serial-portshi: I use ncs v2.1.1 Add uart1 or uart0 to the bink example. results of enforcement: prj.conf Source code part:en-USTelligent Community 13Mon, 14 Nov 2022 10:13:06 GMThttps://devzone.nordicsemi.com/thread/395508?ContentTypeID=1Mon, 14 Nov 2022 10:13:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9918a5a3-2010-4ec5-b660-0eb03f160147Einarh<p>You have enabled both UART1 and I2C1 (TWI1), while your error message stated pretty clearly you cannot do this.</p> <p>Have you considered using another uart than UART1?</p> <p>-Einar</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/395499?ContentTypeID=1Mon, 14 Nov 2022 09:42:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bc3d2f20-bb54-4dd4-967c-0a20592e2fbcjohn.liu<p>Hi</p> <p>I added</p> <div><pre class="ui-code" data-mode="text">my_uart: &amp;uart1 { status = &quot;okay&quot;; };</pre></div> <p>to&nbsp;nrf9160dk_nrf9160_ns.overlay.</p> <p>But there was an error in the build.</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1668418581742v2.png" alt=" " /></p> <p><pre class="ui-code" data-mode="text">/dts-v1/; / { #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x1 &gt;; model = &quot;Nordic nRF9160 DK NRF9160&quot;; compatible = &quot;nordic,nrf9160-dk-nrf9160&quot;; chosen { zephyr,flash-controller = &amp;flash_controller; zephyr,entropy = &amp;cryptocell_sw; zephyr,console = &amp;uart0; zephyr,shell-uart = &amp;uart0; zephyr,uart-mcumgr = &amp;uart0; zephyr,flash = &amp;flash0; zephyr,sram = &amp;sram0_ns; zephyr,code-partition = &amp;slot0_ns_partition; }; aliases { led0 = &amp;led0; led1 = &amp;led1; led2 = &amp;led2; led3 = &amp;led3; pwm-led0 = &amp;pwm_led0; sw0 = &amp;button0; sw1 = &amp;button1; sw2 = &amp;button2; sw3 = &amp;button3; bootloader-led0 = &amp;led0; mcuboot-button0 = &amp;button0; mcuboot-led0 = &amp;led0; watchdog0 = &amp;wdt0; }; soc { #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x1 &gt;; compatible = &quot;nordic,nRF9160-SICA&quot;, &quot;nordic,nRF9160&quot;, &quot;nordic,nRF91&quot;, &quot;simple-bus&quot;; interrupt-parent = &lt; &amp;nvic &gt;; ranges; nvic: interrupt-controller@e000e100 { #address-cells = &lt; 0x1 &gt;; compatible = &quot;arm,v8m-nvic&quot;; reg = &lt; 0xe000e100 0xc00 &gt;; interrupt-controller; #interrupt-cells = &lt; 0x2 &gt;; arm,num-irq-priority-bits = &lt; 0x3 &gt;; phandle = &lt; 0x1 &gt;; }; systick: timer@e000e010 { compatible = &quot;arm,armv8m-systick&quot;; reg = &lt; 0xe000e010 0x10 &gt;; status = &quot;disabled&quot;; }; sram0: memory@20000000 { compatible = &quot;mmio-sram&quot;; reg = &lt; 0x20000000 0x40000 &gt;; }; peripheral@40000000 { #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x1 &gt;; ranges = &lt; 0x0 0x40000000 0x10000000 &gt;; flash_controller: flash-controller@39000 { compatible = &quot;nordic,nrf91-flash-controller&quot;; reg = &lt; 0x39000 0x1000 &gt;; partial-erase; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x1 &gt;; flash0: flash@0 { compatible = &quot;soc-nv-flash&quot;; erase-block-size = &lt; 0x1000 &gt;; write-block-size = &lt; 0x4 &gt;; reg = &lt; 0x0 0x100000 &gt;; partitions { compatible = &quot;fixed-partitions&quot;; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x1 &gt;; boot_partition: partition@0 { label = &quot;mcuboot&quot;; reg = &lt; 0x0 0x10000 &gt;; }; slot0_partition: partition@10000 { label = &quot;image-0&quot;; reg = &lt; 0x10000 0x40000 &gt;; }; slot0_ns_partition: partition@50000 { label = &quot;image-0-nonsecure&quot;; reg = &lt; 0x50000 0x30000 &gt;; }; slot1_partition: partition@80000 { label = &quot;image-1&quot;; reg = &lt; 0x80000 0x40000 &gt;; }; slot1_ns_partition: partition@c0000 { label = &quot;image-1-nonsecure&quot;; reg = &lt; 0xc0000 0x30000 &gt;; }; scratch_partition: partition@f0000 { label = &quot;image-scratch&quot;; reg = &lt; 0xf0000 0xa000 &gt;; }; storage_partition: partition@fa000 { label = &quot;storage&quot;; reg = &lt; 0xfa000 0x6000 &gt;; }; }; }; }; adc: adc@e000 { compatible = &quot;nordic,nrf-saadc&quot;; reg = &lt; 0xe000 0x1000 &gt;; interrupts = &lt; 0xe 0x1 &gt;; status = &quot;okay&quot;; #io-channel-cells = &lt; 0x1 &gt;; phandle = &lt; 0x14 &gt;; }; dppic: dppic@17000 { compatible = &quot;nordic,nrf-dppic&quot;; reg = &lt; 0x17000 0x1000 &gt;; status = &quot;okay&quot;; }; egu0: egu@1b000 { compatible = &quot;nordic,nrf-egu&quot;; reg = &lt; 0x1b000 0x1000 &gt;; interrupts = &lt; 0x1b 0x1 &gt;; status = &quot;okay&quot;; }; egu1: egu@1c000 { compatible = &quot;nordic,nrf-egu&quot;; reg = &lt; 0x1c000 0x1000 &gt;; interrupts = &lt; 0x1c 0x1 &gt;; status = &quot;okay&quot;; }; egu2: egu@1d000 { compatible = &quot;nordic,nrf-egu&quot;; reg = &lt; 0x1d000 0x1000 &gt;; interrupts = &lt; 0x1d 0x1 &gt;; status = &quot;okay&quot;; }; egu3: egu@1e000 { compatible = &quot;nordic,nrf-egu&quot;; reg = &lt; 0x1e000 0x1000 &gt;; interrupts = &lt; 0x1e 0x1 &gt;; status = &quot;okay&quot;; }; egu4: egu@1f000 { compatible = &quot;nordic,nrf-egu&quot;; reg = &lt; 0x1f000 0x1000 &gt;; interrupts = &lt; 0x1f 0x1 &gt;; status = &quot;okay&quot;; }; egu5: egu@20000 { compatible = &quot;nordic,nrf-egu&quot;; reg = &lt; 0x20000 0x1000 &gt;; interrupts = &lt; 0x20 0x1 &gt;; status = &quot;okay&quot;; }; ipc: ipc@2a000 { compatible = &quot;nordic,nrf-ipc&quot;; reg = &lt; 0x2a000 0x1000 &gt;; interrupts = &lt; 0x2a 0x1 &gt;; status = &quot;okay&quot;; }; i2s0: i2s@28000 { compatible = &quot;nordic,nrf-i2s&quot;; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x0 &gt;; reg = &lt; 0x28000 0x1000 &gt;; interrupts = &lt; 0x28 0x1 &gt;; status = &quot;disabled&quot;; }; kmu: kmu@39000 { compatible = &quot;nordic,nrf-kmu&quot;; reg = &lt; 0x39000 0x1000 &gt;; interrupts = &lt; 0x39 0x1 &gt;; status = &quot;okay&quot;; }; pdm0: pdm@26000 { compatible = &quot;nordic,nrf-pdm&quot;; reg = &lt; 0x26000 0x1000 &gt;; interrupts = &lt; 0x26 0x1 &gt;; status = &quot;disabled&quot;; }; regulators: regulator@4000 { compatible = &quot;nordic,nrf-regulators&quot;; reg = &lt; 0x4000 0x1000 &gt;; status = &quot;okay&quot;; }; vmc: vmc@3a000 { compatible = &quot;nordic,nrf-vmc&quot;; reg = &lt; 0x3a000 0x1000 &gt;; status = &quot;okay&quot;; }; uart0: uart@8000 { compatible = &quot;nordic,nrf-uarte&quot;; reg = &lt; 0x8000 0x1000 &gt;; interrupts = &lt; 0x8 0x1 &gt;; status = &quot;okay&quot;; current-speed = &lt; 0x1c200 &gt;; pinctrl-0 = &lt; &amp;uart0_default &gt;; pinctrl-1 = &lt; &amp;uart0_sleep &gt;; pinctrl-names = &quot;default&quot;, &quot;sleep&quot;; }; uart1: arduino_serial: my_uart: uart@9000 { compatible = &quot;nordic,nrf-uarte&quot;; reg = &lt; 0x9000 0x1000 &gt;; interrupts = &lt; 0x9 0x1 &gt;; status = &quot;okay&quot;; current-speed = &lt; 0x1c200 &gt;; pinctrl-0 = &lt; &amp;uart1_default &gt;; pinctrl-1 = &lt; &amp;uart1_sleep &gt;; pinctrl-names = &quot;default&quot;, &quot;sleep&quot;; }; uart2: uart@a000 { compatible = &quot;nordic,nrf-uarte&quot;; reg = &lt; 0xa000 0x1000 &gt;; interrupts = &lt; 0xa 0x1 &gt;; status = &quot;disabled&quot;; pinctrl-0 = &lt; &amp;uart2_default &gt;; pinctrl-1 = &lt; &amp;uart2_sleep &gt;; pinctrl-names = &quot;default&quot;, &quot;sleep&quot;; }; uart3: uart@b000 { compatible = &quot;nordic,nrf-uarte&quot;; reg = &lt; 0xb000 0x1000 &gt;; interrupts = &lt; 0xb 0x1 &gt;; status = &quot;disabled&quot;; }; i2c0: i2c@8000 { compatible = &quot;nordic,nrf-twim&quot;; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x0 &gt;; reg = &lt; 0x8000 0x1000 &gt;; clock-frequency = &lt; 0x186a0 &gt;; interrupts = &lt; 0x8 0x1 &gt;; status = &quot;disabled&quot;; }; i2c1: my_i2c: i2c@9000 { compatible = &quot;nordic,nrf-twim&quot;; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x0 &gt;; reg = &lt; 0x9000 0x1000 &gt;; clock-frequency = &lt; 0x186a0 &gt;; interrupts = &lt; 0x9 0x1 &gt;; status = &quot;okay&quot;; pinctrl-0 = &lt; &amp;i2c1_default &gt;; pinctrl-1 = &lt; &amp;i2c1_sleep &gt;; pinctrl-names = &quot;default&quot;, &quot;sleep&quot;; }; i2c2: arduino_i2c: i2c@a000 { compatible = &quot;nordic,nrf-twim&quot;; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x0 &gt;; reg = &lt; 0xa000 0x1000 &gt;; clock-frequency = &lt; 0x186a0 &gt;; interrupts = &lt; 0xa 0x1 &gt;; status = &quot;okay&quot;; pinctrl-0 = &lt; &amp;i2c2_default &gt;; pinctrl-1 = &lt; &amp;i2c2_sleep &gt;; pinctrl-names = &quot;default&quot;, &quot;sleep&quot;; }; i2c3: i2c@b000 { compatible = &quot;nordic,nrf-twim&quot;; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x0 &gt;; reg = &lt; 0xb000 0x1000 &gt;; clock-frequency = &lt; 0x186a0 &gt;; interrupts = &lt; 0xb 0x1 &gt;; status = &quot;disabled&quot;; }; spi0: spi@8000 { compatible = &quot;nordic,nrf-spim&quot;; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x0 &gt;; reg = &lt; 0x8000 0x1000 &gt;; interrupts = &lt; 0x8 0x1 &gt;; max-frequency = &lt; 0x7a1200 &gt;; status = &quot;disabled&quot;; }; spi1: spi@9000 { compatible = &quot;nordic,nrf-spim&quot;; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x0 &gt;; reg = &lt; 0x9000 0x1000 &gt;; interrupts = &lt; 0x9 0x1 &gt;; max-frequency = &lt; 0x7a1200 &gt;; status = &quot;disabled&quot;; }; spi2: spi@a000 { compatible = &quot;nordic,nrf-spim&quot;; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x0 &gt;; reg = &lt; 0xa000 0x1000 &gt;; interrupts = &lt; 0xa 0x1 &gt;; max-frequency = &lt; 0x7a1200 &gt;; status = &quot;disabled&quot;; }; spi3: arduino_spi: spi@b000 { compatible = &quot;nordic,nrf-spim&quot;; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x0 &gt;; reg = &lt; 0xb000 0x1000 &gt;; interrupts = &lt; 0xb 0x1 &gt;; max-frequency = &lt; 0x7a1200 &gt;; status = &quot;okay&quot;; cs-gpios = &lt; &amp;arduino_header 0x10 0x1 &gt;; pinctrl-0 = &lt; &amp;spi3_default &gt;; pinctrl-1 = &lt; &amp;spi3_sleep &gt;; pinctrl-names = &quot;default&quot;, &quot;sleep&quot;; }; pwm0: pwm@21000 { compatible = &quot;nordic,nrf-pwm&quot;; reg = &lt; 0x21000 0x1000 &gt;; interrupts = &lt; 0x21 0x1 &gt;; status = &quot;okay&quot;; #pwm-cells = &lt; 0x3 &gt;; pinctrl-0 = &lt; &amp;pwm0_default &gt;; pinctrl-1 = &lt; &amp;pwm0_sleep &gt;; pinctrl-names = &quot;default&quot;, &quot;sleep&quot;; phandle = &lt; 0x12 &gt;; }; pwm1: pwm@22000 { compatible = &quot;nordic,nrf-pwm&quot;; reg = &lt; 0x22000 0x1000 &gt;; interrupts = &lt; 0x22 0x1 &gt;; status = &quot;disabled&quot;; #pwm-cells = &lt; 0x3 &gt;; }; pwm2: pwm@23000 { compatible = &quot;nordic,nrf-pwm&quot;; reg = &lt; 0x23000 0x1000 &gt;; interrupts = &lt; 0x23 0x1 &gt;; status = &quot;disabled&quot;; #pwm-cells = &lt; 0x3 &gt;; }; pwm3: pwm@24000 { compatible = &quot;nordic,nrf-pwm&quot;; reg = &lt; 0x24000 0x1000 &gt;; interrupts = &lt; 0x24 0x1 &gt;; status = &quot;disabled&quot;; #pwm-cells = &lt; 0x3 &gt;; }; gpio0: gpio@842500 { compatible = &quot;nordic,nrf-gpio&quot;; gpio-controller; reg = &lt; 0x842500 0x300 &gt;; #gpio-cells = &lt; 0x2 &gt;; status = &quot;okay&quot;; port = &lt; 0x0 &gt;; phandle = &lt; 0x11 &gt;; }; rtc0: rtc@14000 { compatible = &quot;nordic,nrf-rtc&quot;; reg = &lt; 0x14000 0x1000 &gt;; cc-num = &lt; 0x4 &gt;; interrupts = &lt; 0x14 0x1 &gt;; status = &quot;okay&quot;; clock-frequency = &lt; 0x8000 &gt;; prescaler = &lt; 0x1 &gt;; }; rtc1: rtc@15000 { compatible = &quot;nordic,nrf-rtc&quot;; reg = &lt; 0x15000 0x1000 &gt;; cc-num = &lt; 0x4 &gt;; interrupts = &lt; 0x15 0x1 &gt;; status = &quot;okay&quot;; clock-frequency = &lt; 0x8000 &gt;; prescaler = &lt; 0x1 &gt;; }; clock: clock@5000 { compatible = &quot;nordic,nrf-clock&quot;; reg = &lt; 0x5000 0x1000 &gt;; interrupts = &lt; 0x5 0x1 &gt;; status = &quot;okay&quot;; }; power: power@5000 { compatible = &quot;nordic,nrf-power&quot;; reg = &lt; 0x5000 0x1000 &gt;; interrupts = &lt; 0x5 0x1 &gt;; status = &quot;okay&quot;; }; wdt: wdt0: watchdog@18000 { compatible = &quot;nordic,nrf-wdt&quot;; reg = &lt; 0x18000 0x1000 &gt;; interrupts = &lt; 0x18 0x1 &gt;; status = &quot;okay&quot;; }; timer0: timer@f000 { compatible = &quot;nordic,nrf-timer&quot;; status = &quot;okay&quot;; reg = &lt; 0xf000 0x1000 &gt;; cc-num = &lt; 0x6 &gt;; interrupts = &lt; 0xf 0x1 &gt;; prescaler = &lt; 0x0 &gt;; }; timer1: timer@10000 { compatible = &quot;nordic,nrf-timer&quot;; status = &quot;okay&quot;; reg = &lt; 0x10000 0x1000 &gt;; cc-num = &lt; 0x6 &gt;; interrupts = &lt; 0x10 0x1 &gt;; prescaler = &lt; 0x0 &gt;; }; timer2: timer@11000 { compatible = &quot;nordic,nrf-timer&quot;; status = &quot;okay&quot;; reg = &lt; 0x11000 0x1000 &gt;; cc-num = &lt; 0x6 &gt;; interrupts = &lt; 0x11 0x1 &gt;; prescaler = &lt; 0x0 &gt;; }; }; gpiote: gpiote@40031000 { compatible = &quot;nordic,nrf-gpiote&quot;; reg = &lt; 0x40031000 0x1000 &gt;; interrupts = &lt; 0x31 0x5 &gt;; status = &quot;okay&quot;; }; }; pinctrl: pin-controller { compatible = &quot;nordic,nrf-pinctrl&quot;; uart0_default: uart0_default { phandle = &lt; 0x2 &gt;; group1 { psels = &lt; 0x1d &gt;, &lt; 0x2001b &gt;; }; group2 { psels = &lt; 0x1001c &gt;, &lt; 0x3001a &gt;; bias-pull-up; }; }; uart0_sleep: uart0_sleep { phandle = &lt; 0x3 &gt;; group1 { psels = &lt; 0x1d &gt;, &lt; 0x1001c &gt;, &lt; 0x2001b &gt;, &lt; 0x3001a &gt;; low-power-enable; }; }; uart1_default: uart1_default { phandle = &lt; 0x4 &gt;; group1 { psels = &lt; 0x15 &gt;, &lt; 0x10016 &gt;; }; group2 { psels = &lt; 0x10000 &gt;, &lt; 0x3000f &gt;; bias-pull-up; }; }; uart1_sleep: uart1_sleep { phandle = &lt; 0x5 &gt;; group1 { psels = &lt; 0x15 &gt;, &lt; 0x10016 &gt;; low-power-enable; }; }; uart2_default: uart2_default { phandle = &lt; 0x6 &gt;; group1 { psels = &lt; 0x18 &gt;, &lt; 0x10017 &gt;; }; }; uart2_sleep: uart2_sleep { phandle = &lt; 0x7 &gt;; group1 { psels = &lt; 0x18 &gt;, &lt; 0x10017 &gt;; low-power-enable; }; }; i2c2_default: i2c2_default { phandle = &lt; 0xa &gt;; group1 { psels = &lt; 0xc000d &gt;, &lt; 0xb000e &gt;; }; }; i2c2_sleep: i2c2_sleep { phandle = &lt; 0xb &gt;; group1 { psels = &lt; 0xc000d &gt;, &lt; 0xb000e &gt;; low-power-enable; }; }; pwm0_default: pwm0_default { phandle = &lt; 0xf &gt;; group1 { psels = &lt; 0x160002 &gt;; }; }; pwm0_sleep: pwm0_sleep { phandle = &lt; 0x10 &gt;; group1 { psels = &lt; 0x160002 &gt;; low-power-enable; }; }; spi3_default: spi3_default { phandle = &lt; 0xd &gt;; group1 { psels = &lt; 0x4000d &gt;, &lt; 0x6000c &gt;, &lt; 0x5000b &gt;; }; }; spi3_sleep: spi3_sleep { phandle = &lt; 0xe &gt;; group1 { psels = &lt; 0x4000d &gt;, &lt; 0x6000c &gt;, &lt; 0x5000b &gt;; low-power-enable; }; }; i2c1_default: i2c1_default { phandle = &lt; 0x8 &gt;; group1 { psels = &lt; 0xc0012 &gt;, &lt; 0xb0013 &gt;; bias-pull-up; nordic,drive-mode = &lt; 0x6 &gt;; }; }; i2c1_sleep: i2c1_sleep { phandle = &lt; 0x9 &gt;; group1 { psels = &lt; 0xc0012 &gt;, &lt; 0xb0013 &gt;; low-power-enable; }; }; }; rng_hci: entropy_bt_hci { compatible = &quot;zephyr,bt-hci-entropy&quot;; status = &quot;okay&quot;; }; cpus { #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x0 &gt;; cpu@0 { device_type = &quot;cpu&quot;; compatible = &quot;arm,cortex-m33f&quot;; reg = &lt; 0x0 &gt;; #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x1 &gt;; mpu: mpu@e000ed90 { compatible = &quot;arm,armv8m-mpu&quot;; reg = &lt; 0xe000ed90 0x40 &gt;; arm,num-mpu-regions = &lt; 0x10 &gt;; }; }; }; cryptocell_sw: cryptocell-sw { compatible = &quot;nordic,nrf-cc310-sw&quot;; label = &quot;CRYPTOCELL_SW&quot;; status = &quot;okay&quot;; }; leds { compatible = &quot;gpio-leds&quot;; led0: my_gpio: led_0 { gpios = &lt; &amp;gpio0 0xf 0x0 &gt;; label = &quot;Ctrl IO&quot;; }; led1: led_1 { gpios = &lt; &amp;gpio0 0x3 0x0 &gt;; label = &quot;Green LED 2&quot;; }; led2: led_2 { gpios = &lt; &amp;gpio0 0x4 0x0 &gt;; label = &quot;Green LED 3&quot;; }; led3: led_3 { gpios = &lt; &amp;gpio0 0x5 0x0 &gt;; label = &quot;Green LED 4&quot;; }; }; pwmleds { compatible = &quot;pwm-leds&quot;; pwm_led0: pwm_led_0 { pwms = &lt; &amp;pwm0 0x0 0x1312d00 0x0 &gt;; }; }; buttons { compatible = &quot;gpio-keys&quot;; button0: button_0 { gpios = &lt; &amp;gpio0 0x6 0x11 &gt;; label = &quot;Push button 1&quot;; }; button1: button_1 { gpios = &lt; &amp;gpio0 0x7 0x11 &gt;; label = &quot;Push button 2&quot;; }; button2: button_2 { gpios = &lt; &amp;gpio0 0x8 0x11 &gt;; label = &quot;Switch 1&quot;; }; button3: button_3 { gpios = &lt; &amp;gpio0 0x9 0x11 &gt;; label = &quot;Switch 2&quot;; }; }; interface_to_nrf52840: gpio-interface { compatible = &quot;nordic,nrf9160dk-nrf52840-interface&quot;; #gpio-cells = &lt; 0x2 &gt;; gpio-map-mask = &lt; 0xf 0x0 &gt;; gpio-map-pass-thru = &lt; 0x0 0xffffffff &gt;; gpio-map = &lt; 0x0 0x0 &amp;gpio0 0x11 0x0 &gt;, &lt; 0x1 0x0 &amp;gpio0 0x12 0x0 &gt;, &lt; 0x2 0x0 &amp;gpio0 0x13 0x0 &gt;, &lt; 0x3 0x0 &amp;gpio0 0x15 0x0 &gt;, &lt; 0x4 0x0 &amp;gpio0 0x16 0x0 &gt;, &lt; 0x5 0x0 &amp;gpio0 0x17 0x0 &gt;; phandle = &lt; 0x13 &gt;; }; nrf52840_reset: gpio-reset { compatible = &quot;nordic,nrf9160dk-nrf52840-reset&quot;; status = &quot;disabled&quot;; gpios = &lt; &amp;interface_to_nrf52840 0x5 0x0 &gt;; }; arduino_header: connector { compatible = &quot;arduino-header-r3&quot;; #gpio-cells = &lt; 0x2 &gt;; gpio-map-mask = &lt; 0xffffffff 0xffffffc0 &gt;; gpio-map-pass-thru = &lt; 0x0 0x3f &gt;; gpio-map = &lt; 0x0 0x0 &amp;gpio0 0xe 0x0 &gt;, &lt; 0x1 0x0 &amp;gpio0 0xf 0x0 &gt;, &lt; 0x2 0x0 &amp;gpio0 0x10 0x0 &gt;, &lt; 0x3 0x0 &amp;gpio0 0x11 0x0 &gt;, &lt; 0x4 0x0 &amp;gpio0 0x12 0x0 &gt;, &lt; 0x5 0x0 &amp;gpio0 0x13 0x0 &gt;, &lt; 0x6 0x0 &amp;gpio0 0x0 0x0 &gt;, &lt; 0x7 0x0 &amp;gpio0 0x1 0x0 &gt;, &lt; 0x8 0x0 &amp;gpio0 0x2 0x0 &gt;, &lt; 0x9 0x0 &amp;gpio0 0x3 0x0 &gt;, &lt; 0xa 0x0 &amp;gpio0 0x4 0x0 &gt;, &lt; 0xb 0x0 &amp;gpio0 0x5 0x0 &gt;, &lt; 0xc 0x0 &amp;gpio0 0x6 0x0 &gt;, &lt; 0xd 0x0 &amp;gpio0 0x7 0x0 &gt;, &lt; 0xe 0x0 &amp;gpio0 0x8 0x0 &gt;, &lt; 0xf 0x0 &amp;gpio0 0x9 0x0 &gt;, &lt; 0x10 0x0 &amp;gpio0 0xa 0x0 &gt;, &lt; 0x11 0x0 &amp;gpio0 0xb 0x0 &gt;, &lt; 0x12 0x0 &amp;gpio0 0xc 0x0 &gt;, &lt; 0x13 0x0 &amp;gpio0 0xd 0x0 &gt;, &lt; 0x14 0x0 &amp;gpio0 0x1e 0x0 &gt;, &lt; 0x15 0x0 &amp;gpio0 0x1f 0x0 &gt;; phandle = &lt; 0xc &gt;; }; arduino_adc: analog-connector { compatible = &quot;arduino,uno-adc&quot;; #io-channel-cells = &lt; 0x1 &gt;; io-channel-map = &lt; 0x0 &amp;adc 0x1 &gt;, &lt; 0x1 &amp;adc 0x2 &gt;, &lt; 0x2 &amp;adc 0x3 &gt;, &lt; 0x3 &amp;adc 0x4 &gt;, &lt; 0x4 &amp;adc 0x5 &gt;, &lt; 0x5 &amp;adc 0x6 &gt;; }; reserved-memory { #address-cells = &lt; 0x1 &gt;; #size-cells = &lt; 0x1 &gt;; ranges; sram0_s: image_s@20000000 { reg = &lt; 0x20000000 0x16000 &gt;; }; sram0_modem: image_modem@20016000 { reg = &lt; 0x20016000 0xa000 &gt;; }; sram0_ns: image_ns@20020000 { reg = &lt; 0x20020000 0x20000 &gt;; }; }; }; </pre></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/395497?ContentTypeID=1Mon, 14 Nov 2022 09:40:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:552bc393-24e9-4dd1-a650-8dc0c4b29fc9Achim Kraus<p>UART1 is disabled by the nrf9160dk_nrf9160_ns board definition, see <a href="https://github.com/zephyrproject-rtos/zephyr/blob/main/boards/arm/nrf9160dk_nrf9160/nrf9160dk_nrf9160_ns.dts#L19_L22">UART1</a></p> <p>/* Disable UART1, because it is used by default in TF-M */<br />&amp;uart1 {<br />&nbsp;&nbsp; &nbsp;status = &quot;disabled&quot;;<br />};</p> <p>Your log indicates that by &quot;UART not ready&quot;. I guess , your variable &quot;uart&quot; is therefore still NULL.</p> <p>If the uart is not available, and your variable is NULL, you can&#39;t call user_uart_rx_enable, it will not work anyway.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/395481?ContentTypeID=1Mon, 14 Nov 2022 08:36:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:39914387-0bcc-4264-b74e-dba66ca326aeEinarh<p>Hi</p> <p>Could you share the content of your UART1 node from your devicetree found in build/zephyr/zephyr.dts?</p> <p>Best regards,</p> <p>Einar</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/395480?ContentTypeID=1Mon, 14 Nov 2022 08:33:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2007cea5-2140-4215-b57d-a86e03fd840bjohn.liu<p>Hi:</p> <p>I changed it to this, but it failed and kept resetting.</p> <div> <div><span></span></div> <pre class="ui-code" data-mode="text">void uart_init(void) { &#160; &#160; uart = device_get_binding(DT_NODE_FULL_NAME(DT_NODELABEL(uart1))); &#160; &#160; if (!device_is_ready(uart)) { printk(&quot;UART not ready!\n&quot;); } &#160; &#160; user_uart_rx_enable(); }</pre></div> <div></div> <div><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1668414831255v1.png" alt=" " /></div><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/395464?ContentTypeID=1Mon, 14 Nov 2022 06:42:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:133cbda3-9bd0-4d0e-85c9-6fef49807f34Achim Kraus<p>&quot;uart = device_get_binding(&quot;UART_1&quot;);&quot;</p> <p>Starting with NCS 2.1.0, this returns NULL.</p> <p>&quot;uart = DEVICE_DT_GET(DT_NODELABEL(uart1))</p> <p>or</p> <p>&quot;uart = device_get_binding(DT_NODE_FULL_NAME(DT_NODELABEL(uart1)))&quot;</p> <p>works. I would always add the check</p> <p>&quot;if (!device_is_ready(uart)) { printk(&quot;UART not ready!\n&quot;); }&quot;</p> <p>to see, if the device is available and ready.</p><div style="clear:both;"></div>