How IoT water sensors save paddy farmers 2 hours a day
A look at the low-cost solar sensors that text farmers when their field needs water.
OneZeroHub · 24 Oct 2026 · 1 min read
Walking to the field twice a day is the oldest irrigation system there is. It works — until you miss a check in the dry season.
What we built
An ESP32 sensor with a solar panel measures the water level every 15 minutes and sends an SMS when it drops below the farmer’s chosen level.
Why GSM, not Wi-Fi
Rural fields rarely have Wi-Fi, but almost every field has mobile coverage. GSM keeps the system simple and cheap to run.
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