A Minimal Cost, Soil Moisture Measurement System - Logging Wenner Array Resistivity with a Microcontroller for Less than 10 Euros Topics: Electronic Interfaces; Environment Monitoring; Hardware Design, Fabrication Techniques; Measurement and Control of Water In Proceedings of the 3rd International Conference on Sensor Networks SENSORNETS - Volume 1, 373-380, 2014 , Lisbon, Portugal