An LED display is installed outside the public restroom. Once a person enters a stall, the system automatically detects the presence and shows the number of occupied and available stalls on the LED screen.

1. Display the current date, time, temperature, and humidity.

2. The screen shows the number of remaining stalls and occupied stalls.

3. Display the numbers separately for men's and women's restrooms. For example: if there are 3 available stalls in the men's restroom and 2 in the women's, and one person enters the men's restroom, the screen will quickly update to show that the men's restroom now has 2 available stalls.

4. According to the restroom layout, show the location and status of each stall individually.

5. Each stall door has a small LED display that indicates whether the stall is occupied or vacant.