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The biggest problem with using the toilet in department stores is that people do not know the restroom location, the number of users (volume), the restroom status (available/unavailable), and the symbol direction not clear. It raises new issues to find the restroom and wait in a queue if several people are in line. This paper proposed the application of microcontrollers and the Internet of Things for checking restroom status. The system consists of three main modules, 1) counting the number of users in the toilet and turning off the light if there is no available user, 2) verifying sink status (available/unavailable), and 3) verifying toilet status (available/unavailable). Also, the system can control and monitor by using the mobile application supported by the Internet of Things. The results showed that the proposed system works all functions, and the satisfaction assessment of users is, on average, 4.57 out of 5. The application of the system can be used for a smart room in daily life.
Thaenthong et al. (Thu,) studied this question.