Low-cost iot soil sensor system for urban gardens and smart irrigation management
A low-cost, internet-connected soil moisture and nutrient sensor platform designed for urban food production, consumer gardens, and turfgrass. The system enables smart irrigation and nutrient management, with the potential to reduce water use by 30%, increase yields by 30%, and lower nutrient inputs.
Overview
This solution is a low-cost, internet-connected soil sensor platform designed to bring precision agriculture capabilities to urban food producers, consumer gardeners, and turfgrass managers. By integrating inexpensive soil moisture, temperature, salinity, and nitrate sensors with IoT connectivity and cloud-based dashboards, the technology enables automated, data-driven decisions about when and how much to irrigate and fertilize. The platform is designed to make gardening and small-scale farming easier, more productive, and more resource-efficient, supporting local food production resilience and sustainable water use.
Technical specifications
Key features:
- Low-cost sensor hardware (complete system priced at approximately $30), making widespread adoption economically feasible
- Real-time soil moisture and temperature monitoring relayed hourly to an IoT dashboard via Wi-Fi
- Smartphone-based text and email notifications that alert users when irrigation is needed
- Integration of local weather forecast data to inform irrigation decisions
- Wetting front depth detection following irrigation events to optimize water application
- Ongoing development of salinity and nitrate sensing capabilities in collaboration with electrical engineering expertise
- Applicable to consumer gardens, urban farms, and turfgrass management
Technology readiness level
The technology has been prototyped and field-tested in a Colorado residential garden and in turfgrass studies during 2020, demonstrating feasibility of the low-cost sensor and notification system. Preliminary results indicate improved timing and amount of irrigation. Next steps include refining the sensor electronics and wireless carrier, conducting statistically designed field experiments to validate yield gains, water savings, and nitrogen reductions, and gathering user feedback through the Master Gardener program. The technology is currently at an early-to-mid stage of development and is seeking partners to support broader field validation and commercialization, with potential future applications in turfgrass—the largest irrigated acreage in many regions.
About Colorado State University
Colorado State University is a comprehensive public land‑grant research university with an applied, partnership‑driven culture. Multiple research campuses—including the Fort Collins main campus, a public‑facing Denver site, and a foothills research complex with shared core facilities and pilot‑scale testbeds—enable companies to co‑locate, access instrumentation, and run validation studies. A statewide Extension network and proximity to the Front Range innovation corridor provide streamlined engagement with regional and national industry, while an integrated veterinary teaching hospital supports translational studies. Research is supported by competitive federal funding from agencies such as NSF, NIH, USDA, DOE, and DoD. A dedicated technology transfer office streamlines IP, contracting, and startup formation, with incubator and collaboration space for industry partners.
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