Sprinklino is a low cost sprinkler controller that utilizes an array of soil moisture sensors to determine the frequency of watering.

Sprinklino is comprised of two modules.

The sensor module periodically polls each of the moisture sensors and broadcasts the results to the controller via an ASK transmitter module. The sensor module is powered by a battery that is charged via a solar cell.

The receiver parses the results transmitted by the sensor module and activates the sprinklers in the zones that need watering.

References

1. Sizing solar power requirements for a remote monitor
2. Virtual Wire – Arduino Library to transmit msgs via low cost ASK modules
3. Quarter wave antenna construction
4. Cheap soil moisture sensor
5. 12V SLA Battery
6. Solar Cell for charging battery
7. Simple circuit to charge the battery from the solar cells