branch, it's on GitHub . I
also added dummy handler for RPL Option for IPv6 Hop-by-Hop header. It
allows multihop operation with RPL nodes. Description on blogger .
develop high level standards (above
application level). They released CoAP, but they won't define structure of
resources, and contents of messages. You may check OMA LWM2M  - it's
heavilly based on IETF standards and compatible with IPSO. It's more suited
for GSM devices though.