Automatic flower watering device

1. Project Introduction: Because I often forget to keep a pot of green plants, I rarely water the green plants, and they are almost withering now.
In line with the principle of being responsible to the end, we made an automatic watering device for green plants, hoping that they can become green again.
2. Project function: Automatically water the flowers once every day when it gets dark.
3. Introduction to the principle: The solar panel is responsible for both charging the lithium battery and detecting the brightness of the environment. Based on the brightness of the environment, the microcontroller automatically
determines whether night is coming and decides whether to water the flowers. The specific logic implementation is detailed in the
overall physical diagram of the program as follows:
the structural details are as follows:
the internal structure diagram is as follows: