Greenhouse Temperature Monitoring Dashboard

The default band is 18–28 °C, a broad daytime growing window for warm-season crops (tune to your crop). Treat it as a sensible starting point — your own specification, regulator, equipment manual or product datasheet sets the authoritative limits, and you can read your true band straight off the worst case those documents allow. Edit the readings against whatever band applies to you.

Passive venting alone often can't shed peak solar gain: on still, sunny days there's no wind to drive air exchange, so temperature climbs regardless of open vents. Add shade screening (cuts solar load 30–50%), evaporative cooling (pad-and-fan or fogging), or forced ventilation sized to 1–1.5 air changes per minute. The telemetry tells you which days exceed passive capacity and how long — that's your sizing case for active cooling.

Match the interval to the consequence and the rate of change: where an excursion spoils product or risks safety, log continuously (or as often as you can sample); where it is merely informative, daily or per-shift spot checks suffice. The in-range % and excursion count only mean something if your sampling is regular — sparse, irregular readings hide the excursions between them.

Yes — every reading is stored in this browser's localStorage on your device and nothing is uploaded to any server, which also makes the dashboard usable on sites with strict data policies. For shared, audit-grade records across a team or for regulatory retention, export the values into your own system.