Automatic irrigation module DIY kit soil moisture detection

From the shop's description

Automatic irrigation module DIY kit soil moisture detection is a high-quality electronic component designed for Arduino, prototyping, and educational electronics. The fork-shaped probe with two exposed conductors, acts as a variable resistor (just like a potentiometer) whose resistance varies according to the water content in the soil. This resistance is inversely proportional to the soil moisture: The more water in the soil means better conductivity and will result in a lower resistance. The less water in the soil means poor conductivity and will result in a higher resistance. The sensor produces an output voltage according to the resistance, which by measuring we can determine the moisture level. Note 1, the child can be free of welding, but you need to peel the wire, twist the copper wire together, with a black tape to protect; 2. The pump cannot run in the air for a long time; 3, the system is connected, power on, the pump has been working, is right, because in the air, the probe can not detect the humidity, so the pump has been working, the correct installation into the pot without any problems Package included: 1 x relay module 1 x soil moisture probe + comparison module 1 x small water pump It’s perfect for DIY makers, students, and anyone building custom electronic circuits or STEM kits.