Firstly, I defined my target problem and designed a solution for it. There are two parts of my device:

• Monitor the soil moisture and remind people through sounds and light:

Based on the YL-69 Soil Moisture Sensor threshold, I defined the moisture monitoring bar as 2500. When the moisture sensor's value is bigger than 2500, the light and sound will work.

• Monitor the plant status that if be weighted by other stuff. If it is, the light and sound will work:

I set up the force of the FSR as 1000 at the beginning and tried with different stuff to press the plant and iterate the force threshold. Then, I use  1500 as the bar of the FSR sensor. When the force bigger than 1500, the sound and light will work to remind people to check the status of the plant.