00fa15f98f
Satisfies the Phase 1 Definition of Done: - content/ validates cleanly against the frozen schema. `make validate` reports OK: 40 document(s) validated, 0 violations. - Six areas exist, each with an L1 entry: ai-overview, platform-overview, edge-overview, products-overview, history-overview, about-overview. - All six areas have an L2 entry: ai-systems, platform-estate, edge-fleet, products-business, history-engagements, about-narrative. - 28 L3 artefact stubs under content/<area>/l3/. Every artefacts[].url in every document resolves to one of them; the validator proves there are no dangling references (and a deliberately broken copy exits 1). - Every metric value traces to a source line in the evidence notes or the approved metric set in reference/content-map.md (per-metric citations are recorded in the AUD-131 completion comment). - Every document carries confidence and last_verified=2026-10-26; the validator rejects a missing or non-canonical value. - docs/content-redaction.md records the redaction pass: identifiers, third party personal data, credentials and infrastructure detail excluded, with reasons, plus the two numbers that are reported rather than smoothed. Honesty positions held: 3 businesses active (12 adoptions over time), Where-Woof deployed and pre-market, failures kept in (edge-failures), no promotion of in-progress work to delivered. No site code, no templates, no CSS, no rendering (Phase 2).
36 lines
1.6 KiB
Markdown
36 lines
1.6 KiB
Markdown
---
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id: edge-lora-sprinkler
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area: edge
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level: 3
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title: "Artefact — LoRa irrigation under solar power"
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claim: "A solar-powered controller that sleeps · wakes on radio · and drives a solenoid — with the first version polling over a message queue instead."
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confidence: running
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period: "2020–"
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tech: [ESP32, LoRa, LiFePO, Solenoid, Home Assistant, RabbitMQ]
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metrics: [{label: "major revisions", value: 2}]
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artefacts: []
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public: true
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last_verified: 2026-10-26
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tags: [edge, lora, solar, irrigation, artefact]
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---
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# Artefact — LoRa irrigation under solar power
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**Status: stub.** The bill of materials and the wake-on-radio change land in Phase 7.
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## What the artefact is
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The build: solar panel, charge controller, LiFePO battery, ESP32, LoRa module, relay and solenoid valve. Version one woke on a schedule and polled through a message queue to learn whether it should run. Version two is better: a LoRa packet can wake the ESP32 from deep sleep and switch the valve directly, so on-time is short and the battery is not spent asking whether there is work.
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## What it proves
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Iteration on a real constraint. The first version worked; the second version was designed around the power cost of asking, which is the kind of decision you only make if you are watching the battery.
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## Limits stated on the page
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Watering is partly scheduled and partly a person. The routine lives in the automation layer and the voice assistant can trigger it, but the garden is not fully automatic and the page does not pretend otherwise.
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## When it is delivered
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Phase 7. Source: evidence notes section 1.
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