BC95-G and LwM2M and CoAP

IoT Modules
1

Hello there,

I am a beginner at working with NB-IoT. I have a Quectel BC95-G and I want to use LwM2M and CoAP AT Commands to communicate with the Leshan server.
I have some major problems that I have not found on the Internet:

First of all, when sending data to an LwM2M server, the content-format must be: “application/vnd.oma.lwm2m+tlv” which is not assigned to a code (like “application/link-format” which is assigned to 40) in the BC95-G CoAP AT Commands Application Note. As I search, I found that “application/vnd.oma.lwm2m+tlv” has a code which is 11542, but when I use it in AT+QCOAPOPTION to create a CoAP Message based on that, I get an ERROR.
So, how should I create my CoAP packet to send data to the LwM2M server?

Thank you all. I am waiting for your response.

2

Hi Aniita
Please also grab the UEmonitor log at the bottom of the module, we need to look at the underlying protocol that interacts with the server.

3

Hello,
Thank you for your reply. Where can I download the UEmonitor?

4

Hi Aniita
https://quectel123-my.sharepoint.cn/:f:/g/personal/ae-fae_dom_quectel_com_cn/Eq7yDmOQbPVFpdth_um2dWQBTnR-lx6eFtTUEaVjff33LA?e=7lAnPw