Hi. I am currently implementing CoAP communication using BG95-M6.
Quectel_BG95&BG77&BG600L_Series_CoAP_Application_Note_V1.0.pdf
Referring to the description in the document, it seems that the following is used when sending CoAP.
Example)
AT+QCOAPSEND=0,1,2,1,20
> Hello, CoAP message!
This example asks to write a string
but I want to send a payload consisting of bynary instead of a string.
or, if I enter a Hex string, can I send this as payload?
Is there a solution?
Coap payloads include a variety of different media types, including binary payloads,text loads, XML loads, JSON loads, CBOR loads, and so on.
Yes, that’s right. CoAP can use various media formats.
So, I’m asking if there is a way to send binary payloads when referring to “Quectel_BG95&BG77&BG600L_Series_CoAP_Application_Note_V1.0.pdf”
in BG95.
It is apologize that I checked and found the BG95-M6 is not support send binary payloads.
Is there no other way?
We need to complete development within this year.
Could you please tell me the reason of send binary with coap?I suggest you to use a different protocol or media formats.
“Quectel_BG95&BG77&BG600L_Series_LwM2M_Application_Note_V1.0.pdf” provided by your company is convenient, but the usable LwM2M Objects are limited, and we want to implement LwM2M directly in the CoAP layer to flexibly use [GET, POST, PUT, DELETE], Torken, and CoAP Options using CoAP’s Header.
And we tried to use the “application/vnd.oma.lwm2m+tlv” format to reduce the payload size.
We have implemented it in our server as well, and we only need to implement communication on the device, but we didn’t know that the module can’t send binary packets.
If there is no way, we will use “application/vnd.oma.lwm2m+json” as an alternative.