Building A Smarter Sprinkler With Scenic And Nerves
summary
Builds a closed‑loop sprinkler that measures soil moisture with ZigBee capacitive sensors, stores readings in Google Firestore, and runs valves via a relay board driven by Nerves on Raspberry Pi. Targets about 40% soil moisture, polls hourly, picks the driest zone, and waters that zone for a few minutes to bump moisture up. Includes a custom Scenic component touchscreen showing live zone state. Prototype raises moisture and visibly greens the lawn but is single‑user, hardcoded, and not productionized.
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