Hi, I am currently working on a project for plant watering system. Right now i'm just testing and having fun, but in future i'm planning on putting a real time application and running it for weeks, months etc.
At the moment I am using http://www.aliexpress.com/store/product/Soil-Hygrometer-Detection-Module-Soil-Moisture-Sensor-For-Arduino-5pcs-lot/809689_714793698.html
this moisture sensor and it is rather horrible, starting by the randomly increasing/decreasing moisture to corosian.
I am looking for any tips for a moisture sensor, which could be realible for more than a month + give precise readings and also wouldn't cost too much.