Seeking recent experiences in the development and deployment of low-cost soil moisture sensors (ideally under $50/sensor) connected to arduino-based dataloggers. What is the longetivity of the sensors ? Thanks.
Thank you very much, Mohamed and Zeashan - the links and the information provided is very helpful. As the project is initially for 3 years, i'll go with either a capacitive sensor or an inexpensive resitivity sensor. The latter has issues of corrosion, but some users in a forum mentioned programming the sensors to be switched on ONLY before taking a measurement ( say every 2 hrs), and then switching off.