OK, I have burried a gypsum sensor in the ground, hooked up the moisture sensor to it, written some software, and have finally got some readings. The onboard thermometer is giving me some sensible readings (actually a bit high but thats probably the voltage regulator keeping the board warm).
The voltage reading seems to be hovering around -0.005 Volts (-0.00559375 a few minutes ago).
What I don't know is if this is a reasonable starting point or not. I could leave it in the ground for a year or so and look for patterns (I expect to do this anyway) but I'm trying to work out if I'm even in the right ballpark at the moment.
What sort of voltage ranges do people get in a range from dry to wet soil?
Thanks a lot.
The voltage reading seems to be hovering around -0.005 Volts (-0.00559375 a few minutes ago).
What I don't know is if this is a reasonable starting point or not. I could leave it in the ground for a year or so and look for patterns (I expect to do this anyway) but I'm trying to work out if I'm even in the right ballpark at the moment.
What sort of voltage ranges do people get in a range from dry to wet soil?
Thanks a lot.
. What I normally tell people to do is (before it is buried) to take a dry reading, then place the sensor in a cup of water and take a wet reading. Those will then be your extreme values. It will unlikely that you will ever get all the way to either exteme once the sensor is buried but that will give you a good starting point.
