Arduino Automatic Smart Plant Watering Kit 2.1Our Arduino Automatic Smart Plant Watering Kit is based on Arduino Leonardo which has been integrated into the mainboard. We add an RTC to set timing watering and a 0. 96 inch OLED to show the time and the soil moisture status. The kit includes a pump, capacitive soil moisture sensors, a water switch to redirect the water to up to 4 plants, and pipes for the water to go through. Compared with the resistance moisture sensor, the soil moisture sensor is