Hello
I have question about Accept version & content-format version on iotivity 1.3.0 (OCF 1.0 spec.)
Accept version : CoAP option number 2049
Content-Format Version : CoAP option number 2053
above new option idicate a critical option(Odd number) - CoAP rfc7252.
(Not elective option(even number).)
so if some device uses OIC 1.1 spec. and does not implemented new critical option, some CoAP lib. will reject that message.
Of cource, if device uses iotivity open source, there is no issue.
but if device uses custome OCF implementation or 'iotivity constrained', device could not response about request of iotivity 1.3.0.
(maybe 'er-coap' library will reject unsupported critical option - CoAP rfc7252)
So i think above new option should be elective option not critical option for backward-compatibility.
Please correct me if i misunderstood.
Thanks,
bt.jo
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