RE: How do I know where I should ask my question?

Suhas0 — Thu, 26 Feb 2026 12:50:55 GMT

Hi,

I am working on the nRF9151 DK (nrf9151dk_nrf9151ns) and need to use an additional UART for communication with an external ESP32.

Currently:

UART0 is used for console/debug.
UART1 is used by the LTE modem.

Therefore, I am attempting to enable UART2 for external communication.

After reviewing the board schematic, I found that P0.02 and P0.03 are not used by any active peripherals in my setup. These pins are routed to the Arduino header, and since no shield is connected, I assume they can be reassigned.

I have added the following overlay: nrf9151dk_nrf9151ns.overlay

&uart2 {
status = "okay";
current-speed = <115200>;
pinctrl-0 = <&uart2_default>;
pinctrl-names = "default";
};

&pinctrl {
uart2_default: uart2_default {
group1 {
psels = <NRF_PSEL(UART_TX, 0, 2)>,
<NRF_PSEL(UART_RX, 0, 3)>;
};
};
};

prj.conf
CONFIG_SERIAL=y
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y
CONFIG_UART_NRFX=y
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_UART_2_ASYNC=y
CONFIG_UART_2_NRF_HW_ASYNC=y

RE: How do I know where I should ask my question?

Vitalie — Mon, 10 Aug 2020 09:53:04 GMT

I tried to enable the gpiote module in nrfx52_config.h (#define NRFX_GPIOTE_ENABLED 1) in Mynewt and I got an incomprehensible error

Error: In file included from repos/apache-mynewt-core/hw/mcu/nordic/src/ext/nrfx/nrfx.h:37,
from repos/apache-mynewt-core/hw/mcu/nordic/src/ext/nrfx/drivers/src/nrfx_gpiote.c:31:
repos/apache-mynewt-core/hw/mcu/nordic/src/ext/nrfx/hal/nrf_gpio.h:46:25: error: expected declaration specifiers or '...' before '(' token
46 | #define NUMBER_OF_PINS (P0_PIN_NUM). Thanks