Hello, I am using this part since a couple of weeks. I am tetsing it with my plant and I am suprised to see some stange value (if it is). First I mesure the value with the sensor outside of the soil. It return me something like 12. The I insert in glass of fully dreid soil. It return me a value of 860. Then into a soil humid. It return me something like 700, and a soil dry. Instead of a value close to 100 or below 300, it return a value of 700.

Then I tried with my plant. I gave to my plant a lot of water and then inserted the sensor into soil for one week. At the begining, the sensor return me a value of 779. During the week, I expected to see the value going down, but not. Now the soil is fully dried and the sensor return me a value of 650. It's strange because it should print a value below 300. If I remove the sensor from the soil, it print me a value of 12.

I do not understand when the soil is fully dried, I do not have a value below 300 or around 100.

FYI: I inserted the 3/4 of the "legs" into the soil. If I insert only 50% of the legs, the values seam to be better...

Cheers

Easy to use and gives better readings than similar-looking sensors from other suppliers. The documentation is excellent and easy to follow.

The addition of the screw terminals made the physical installation easy (and easy to rewire w/ longer cables) in flower pots. Once it was wired, I used a RPi to get the various readings I needed to control water pumps.

Used this little guy for my first year engineering final project, and had no issues. Pretty easy to setup, just three pins, and a useful little gadget to play around with.