This document summarizes a project that applied big data techniques in precision agriculture in Greece. The project collected data from sensors, satellites, and farmers to generate advisory services helping small farmers optimize irrigation, fertilization, and pest/disease management. This reduced costs and increased yields for olive, grape, and peach farmers. The project established a business model providing the services by subscription to support small farmers with no upfront investment. Results included reduced costs, optimized fertilizer use, and increased profits for participating farmers.