TLV format for single instance resource

[sbernard31]

The recent versions of the spec say now TLV can be used for single resources.

"The LWM2M Client MUST support the TLV data format for all
requests." (§6.3 Data Formats for Transferring Resource Information)

(There is a PR in Leshan which implements this)

[dnav]

Thanks for pointing this.

Currently for single resource request, the client can encode the data using TLV if the CoAP GET message content type is application/vnd.oma.lwm2m+tlv. If there is no content type specified, the client uses plain text by default.
On the server-side, the API does not allow to specify the content-type. I'll rework this part.

Regards,