LwM2M can not connect to leshan bootstrap server

[shohidur]

Hi,

I have been trying implement this, which i successfully implemented two week earlier. But for some reason i am not able to implement this anymore. I tried last week and till today.

Could you please suggest what might be the source of evil ?

Here is the description what i have gone though:

1. flashing nrf522832 with lwm2m client example with secure mode

2. Connecting device with my Ubuntu 18.04 LTS according to this  

  -- After this step LED2 came on

  --After this step i could ping in bt0 interface

3. I did this to run leshan bootstrap and leshan server

--- After this i could see booth server running, i could reach them from browser

4.  In this stage i press the Button 1 to initiate bootstrap and monitor in the wireshak

nothing happening after that . I do not have idea to troubleshoot this. please help

[shohidur]

i m getting this error and seems to me this the reason, could you please tell me how to get rid of following warning:

2018-11-15 15:55:26,412 WARN NetworkConfig - cannot write properties to file /home/iot/leshan/Californium.properties: Californium.properties (Permission denied)

[Håkon Alseth]

Does your current user have permissions to that file? Have you edited this file via another user or similar?

Are you able to post configuration to the bootstrap server via your localhost, like described here?

 

The lwm2m example is by default setup with security (main.c::USE_SECURITY). Is your server setup this way as well?

Bet regards,

Håkon

[shohidur]

Hi,
Your comment helped a lot though there is still something that i am not clear about. here is the kernel version of my machine:

uname -r

4.15.0-20-generic

i changed the sdk config according to your suggestions and I manged to execute boostrapping and registration of one client. What i am seeing in wireshark is confusing me. There are some message saying malformed packets and unknown packets. Any idea why ? Screenshot added below

[Håkon Alseth]

Could you share the wireshark log? Also, are you running with USE_SECURITY set to '0'?

[shohidur]

Hello,

I am running with USE_SECURITY set to '1', and i am not sure what log are you asking for. I did not find anything in my /var/logs directory for wireshark.

[Håkon Alseth]

Hi,

 

I was referring to the wireshark sniffer trace. If you use security, wireshark will not be able to decrypt, thus you'll not be able to peek into the content.

Could you run it without USE_SECURITY, then do a wireshark trace?

Kind regards,

Håkon

[shohidur]

ok, great,  i will post the wireshark capture with USE_SECURITY set to 0.

thanks