This is a smart umbrella bucket, which is placed at the door of the house. When someone is about to go out, the ultrasonic sensor (HC-SR04) on the umbrella bucket will be triggered, and the user will be notified through the Blynk App whether or not to bring an umbrella out.

The reminder effect can prevent users from being relentlessly attacked by wind and rain, thereby preventing colds, fever, coughing, and being misunderstood from COVID19. It can be said to have many functions and perfect.