Subscribe to live point updates via Haystack watchSub and watchPoll

domain: project-haystack.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗

Steps

  1. POST to /haystack/watchSub with a watchDis display string and rows of id Refs to open a new watch, optionally requesting a lease duration
  2. Capture the watchId and server-assigned lease from the response grid meta — servers may ignore a requested lease
  3. If subscribed entities proxy an external source (e.g. a Haystack-to-BACnet gateway), watchSub should trigger a downstream refresh (poll or COV) on that source
  4. Poll with watchPoll using the watchId meta tag; add a refresh meta tag to force a full re-read instead of changes-only
  5. Add more entities to the same watch by resending watchSub with the existing watchId; close it with watchUnsub and the close meta tag

Known gotchas

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