ncs1.61 peripheral_uart : enable uart when connected and disable uart when disconnected

[RHeine]

Hi,

I work with win10 laptop, Toolchain  nrf Connect SDK 1.6.1 on a nrf5340dk.

On peripheral_uart sample, I would like to enable uart when a device is connected and I want to disable uart when device is disconnected to reduce consumption.

There is the consumption mesure by PPK2:

It's seem that between two advertisings the consumption is due to the enable uart.

I need to have the lowest consumption when the nrf5340dk is advertising.

First step, I tryed to disable uart from prj.conf:

CONFIG_SERIAL=n & CONFIG_LOG=n

but after build and download the 4 led were ON and the was no more advertising.

Second step, I tryed to disable uart from the overlay file:

&uart0 {
    status = "disable";

};

but after build and download there was no led on and no more advertising.

There is my project:

5040.peripheral_uart.zip

Could you give me, please,  an example how to enable uart when a device is connected and disable uart when device is disconnected ?

Best regards,

Rob.

[Kazi Afroza Sultana]

Hello Robert,

Good Morning. 

Sorry I had a typo in my reply. Instead of witing network core I wrote application core  2times.

Actually, I meant that you have to add CONFIG_SERIAL=n in your hci_rpmsg.conf file. That means you disable the SERIAL from network core.

''I'm not sure to understand your reply, I tryed to coment  "#CONFIG_SERIAL=y" and  "#CONFIG_SERIAL=n" into prj.conf, so I have no config_serial.''

Yes, this is correct set up in prj.conf.  

Could you please try this first ? 1. #CONFIG_SERIAL=y" and  "#CONFIG_SERIAL=n" into prj.conf  2.  CONFIG_SERIAL=n in your hci_rpmsg.conf file

'Do you know what I should do to wake up the uart ?'' -- I will look at tis new query soon.

 

Best Regards

Kazi Afroza Sultana

[RHeine]

Hi Kazi,

"Could you please try this first ? 1. #CONFIG_SERIAL=y" and  "#CONFIG_SERIAL=n" into prj.conf  2.  CONFIG_SERIAL=n in your hci_rpmsg.conf file"

it's already the configuration I have.

[RHeine]

I tryed:

"

#CONFIG_SERIAL=y

#CONFIG_SERIAL=n

" into prj.conf

That advertising.

"

CONFIG_SERIAL=y

#CONFIG_SERIAL=n

" into prj.conf

That advertising too.

"

#CONFIG_SERIAL=y

CONFIG_SERIAL=n

" into prj.conf

That do not advertising.

[Kazi Afroza Sultana]

Hello Robert,

Good Morning. 

Your advertising picture looks normal. And you are right with the configuration for the first 2.

The last configuration will not work. Because we can not disable Serial from both prj.conf and config file (hci_rpmsg.conf) from the child image folder. In the prj.conf file it should be like this #CONFIG_SERIAL=n. 

Best Regards,

Kazi Afroza Sultana

[RHeine]

Good Morning Kazi,

Thank you for your answer.

" 'Do you know what I should do to wake up the uart ?'' -- I will look at tis new query soon. "

Do you have some news about how to wake up the uart ?

Best regards,

Rob.