# WISHI hackathon 2020-04-09 --- ## Logistics * April 9th (Thursday), 14:00-18:00 UTC * (7:00-11:00 PDT, 16:00-20:00 CET) * Webex: https://ietf.webex.com/ietf/j.php?MTID=m83b10e45779af76449eb5c69e63dde04 * Notes: https://hackmd.io/4ZmzsXjeRoe6pQLqFejckg?both --- ## Objectives * Get some progress on the code we are using * Both open-source and unilateral code * Find bugs in specifications, code * **Document** results * PRs to specifications, to code * Tutorials, Wikis, ... --- ## Running an Online Hackathon * We stay in the Webex all the time * Long stretches will be quiet * Hard to organize "Legitimate Peripheral Participation" * ➔ Don't be shy just showing off things by screen share * More formal start, end (20–30 min each) * Collaborate using hackmd, etc. -- even PRs --- ## What do we want to achieve: Potential Challenges * PoC of **semantic proxy** that can read a temperature value of LwM2M device from OCF application, all based on the SDF model only * One-up: use OCF conformance testing tool as a client with that --- ## Proxy challenge * OCF application sends a request to the HTTP/Swagger API of the proxy * Proxy makes a request on Leshan API based on the HTTP request and * Leshan makes a LwM2M requests to client * The resulting response is sent to OCF application in the format used by OCF --- ```graphviz digraph G { { // rank=same; "OCF app" -> "Proxy" [label="OCF req"] "Proxy" [fillcolor = red] "Proxy" -> "LwM2M server" [label="Leshan API req"] "LwM2M server" -> "LwM2M device" [label = "LwM2M req"] "LwM2M device" -> "LwM2M server" "LwM2M server" -> "Proxy" "Proxy" -> "OCF app" } } ``` --- ## Proxy challenge details * LwM2M (SenML) ➔ OCF data format * Need SDF file + mapping * One-up: (Could be configured initially) Carry over node identity information: what implementation talking to * Can OCF APIs use LwM2M endpoint IDs (URNs)? * How to discover? --- ## Meta-Challenge: Object Instance Data: formatting? * How to express what kind of format a protocol binding / ecosystem model is using, e.g.: * media type field * How to describe the above? * JSON-schema.org style descriptions * CDDL? * SDF qualities (bit width, etc.) --- ## Agenda today |time|topic| |----|-----| |14:00Z | start| | | Intro (Carsten)| | | Descriptions of tools brought to the Hackathon (MJK, AK, KH, Who else?) |14:20Z | start hacking period |17:30Z | discuss what we have achieved | 18:00Z| end