RE: netcore claiming ownership of GPIO pin 1.01

Håkon Alseth — Mon, 16 Feb 2026 13:30:33 GMT

Hi,

As mentioned, I have used the configuration in the .zip, and cannot replicate the issue.

If you do the same exercise as me (add your configurations to a arbitrary project), do you see the same issue? Please share a verbose log.

Kind regards,

Håkon

RE: netcore claiming ownership of GPIO pin 1.01

PatrikB — Mon, 16 Feb 2026 13:26:07 GMT

Thank you Håkon for the reply. Unfortunately this did not solve the issue. Do you have any other suggestions?

RE: netcore claiming ownership of GPIO pin 1.01

Håkon Alseth — Mon, 16 Feb 2026 12:26:16 GMT

Hi,

Ownership of the GPIOs are set by the application core, via node "gpio_fwd".

I am using your board/*.overlay file in bluetooth/peripheral_lbs, and your sysbuild configuration, and print the register:

printk("GPIO P1.01: %x ", NRF_P1->PIN_CNF[1]);

If you are using any other sub-images (mcuboot for instance), you need to delete the entry there as well (my_project/sysbuild/mcuboot.overlay), which you seem to do already.

Here's my output:

*** Booting MCUboot v2.1.0-dev-12e5ee106034 ***
*** Using nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
I: Starting bootloader
I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
I: Boot source: none
I: Image index: 0, Swap type: none
I: Bootloader chainload address offset: 0xc000
?*** Booting My Application v2.9.0-7787b2649840 ***
*** Using nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
Starting Bluetooth Peripheral LBS example
I: 2 Sectors of 4096 bytes
I: alloc wra: 0, fe8
I: data wra: 0, 0
I: HW Platform: Nordic Semiconductor (0x0002)
I: HW Variant: nRF53x (0x0003)
I: Firmware: Standard Bluetooth controller (0x00) Version 45.41337 Build 3074452168
I: No ID address. App must call settings_load()
Bluetooth initialized
I: Identity: CA:C4:23:90:3B:06 (random)
I: HCI: version 6.0 (0x0e) revision 0x206b, manufacturer 0x0059
I: LMP: version 6.0 (0x0e) subver 0x206b
Advertising successfully started
GPIO P1.01: 3

I would recommend that you delete the build folder, and try to regenerate the project and see if this issue persists.

Kind regards,

Håkon