Abstract: A stereo garage model based on the Internet of Things and programmable logic controllers is designed to solve the parking problems in old urban communities by making full use of the upper space of the parking space to provide more parking spaces. The model uses Siemens 1200 programmable controller (PLC) as the field controller, uses a variety of sensors to collect and detect garage vehicle and parking space information, and integrates Internet of Things technology to upload the information to the cloud server. The model uses a touch screen to design the configuration screen to monitor the system operating status in real time, feedback user needs to the PLC, and controls the movement of the mechanical device to automatically stored or retrieved cars. At the same time, users can use the mobile APP to remotely access the cloud server anytime and anywhere to make reservations. The model can simulate the lifting and lateral movement of automatically stored or retrieved cars in reality, achieve the expected results, and provide some reference for solutions to parking difficulties in old communities.

Key words: Internet of things technology, PLC, stereo garage