Device_credetials_installer.py cannot be used

[john.liu]

Hi:

I would like to use the Device_credetials_installer.py script to generate and install device certificates (including public/private key pairs) for the device.

ncs v2.8.0 and example at_client.

I tested the serial port and there were no issues.

But when I use Device_credetials_installer.py, it doesn't work. I don't know why.

Customize nrf9151 board.

[Carl Richard]

Hi John!

Thanks for reaching out. From your screenshot it seems like your Nordic device is connected to COM3, but you are specifying COM8 in the call to device_credentials_installer. May I ask why?

Also, which version of nrfutil and nrfcloud_utils do you have?

Best regards,
Carl Richard

[john.liu]

HI: 
Thanks for your help!!!
Just jlink's COM3, but actually using COM8's serial port tool to communicate with NRF9151.
I don't know how to check the version of nrfcloud_util,I installed it using "pip3 install nrfcloud-utils".

[Carl Richard]

Hi again!

Thank you. That makes sense! Your tools also seems to be of the correct version. When did you install nrfcloud-utils?

I have not managed to reproduce the issue here. Could you try to reflash the device with the at_client sample before running the following command instead: device_credentials_installer --cmd-type=at --port COM8? Please paste and share any logs here.

Best regards,
Carl Richard

[john.liu]

Hi:

I can use my tools to test it. Like this:

I am using the at_cient example.

This is a file that modifies the tx and rx of UART0.

0211.nrf9151dk_nrf9151_ns.overlay

[Carl Richard]

Hi again!

Thank you. Do you have custom board files as well, or are you only using this overlay? Please share the board files if you have them. 
 
Just out of curiosity, please try the following command as well: device_credentials_installer --cmd-type=at --port COM8 --dsrdtr

Best regards,
Carl Richard