As for some plants lovers, they are keen on spending time in caring for their plants. Yet if they are busy in your work or entertainments, plants may wither by virtue of lacking water. To avoid this, we launched an automatic watering device with four humidity sensors and a water pump. It can water four plants pots. An equipped display screen can show the humidity value of soil.
Insert four soil moisture sensors into four plant pots, and put four water pump pipes in the pots. You can see that the LCD1602 display show soil moisture value. If soil is humid enough, the backlight of the LCD1602 display will be turned off after 10 seconds, which can save power. If soil lacks water, the backlight will light up, and water pumps will pump water to pots. After 3 seconds, the relay will be turned off, the water pump will stop pumping, and wait for 5 seconds, then the soil humidity sensor will continue to detect.
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