SanaSolo 3.0: A Low-Ground, IoT-Based Rover for In-Situ Soil Fertility Monitoring

Over 60% of global agricultural soils suffer from nutrient degradation, yet most farmers still lack access to realtime, affordable soil health diagnostics. To address this gap, this research presents SanaSolo 3.0, a mobile, edge-enabled, scalable, modular, and terrain-adaptive embedded system for in-situ soil fertility monitoring. Building upon previous iterations, SanaSolo 3.0 integrates a spring-suspension tracked chassis, embedded sensor suite (measuring $\mathbf{p H}, \mathbf{E C}$, moisture, temperature, and macro-nutrients), and onboard classification logic for real-time assessment. The system was validated across biologically enriched and degraded soils and compared against certified laboratory benchmarks. Results show consistent accuracy and the ability to distinguish fertility classes without invasive sampling or extensive external processing. By combining non-invasive data acquisition with biologically grounded calibration, SanaSolo 3.0 advances scalable, low-cost, and field-deployable solutions for regenerative agriculture.