I've been having trouble calibrating the Spark Fun sensor with my UNO. All the other guides I've seen, it's worked out of the box for them once they connected it to the appropriate pins. For me, the only 2 outputs that seem correct are, a 0 reading when in the air, and a high reading, around 900-ish when submerged in water.
The pin has 3 connections, VCC, GND, and SIG, and I have set them to a Digital PIN, GND, and A0 respectively.
Every other soil that I've dipped the sensor into, only gives the same output as if it were in water, which is wrong.
I just wanted to know, is the sensor just not "sensitive enough", or am I doing something wrong?
I also have not soldered the jumper wires into the sensor, I just curved them into a J shape in order to hold it in, could that be causing an error in my readings?