How to turn off *** Booting Zephyr OS *** message displayed on serial terminal for nRF9160

[Wesley14]

Hi,

I am having some trouble with regards to the "Booting Zephyr OS" message that appears in the serial terminal. Below is an image displaying the issue.

My question is, how do I stop this message from displaying?

I am using SDK 1.9.0.

I have changed the following as well, but the message still appears:

CONFIG_SERIAL=n

CONFIG_UART_SERIAL=n

CONFIG_SECURE_BOOT_DEBUG=n

CONFIG_LOG=n

Thanks in advance

[Øyvind]

Hello, 

As mentioned by my colleague Charlie in ticket 328809, if you are new to nRF Connect SDK we strongly suggest that you switch to the latest NCS version(NCS 2.6.1 now and NCS 2.7.0  and MFW 1.3.6 on your device.

NCS 1.x and 2.x has a big change on security management, you would not have this displaying when you switch from SPM to TF-M (introduced since NCS 2.0.0).

Have a look at the Developer Academy for how to get started with both nRF Connect SDK and Cellular application development.

---

In the spm.conf configuration in the SLM application (applications/serial_lte_modem/child_image/spm.conf) add the following: config_boot_banner=n
Edit: I wrote =y but should be =n

Let me know how that works for you. 

Kind regards,
Øyvind