Design and implementation of a lightweight advertising system based on Internet of Things

The combination of remote advertisement placement and smart city brings new opportunities and challenges for outdoor advertisement placement in cities. This paper proposes a lightweight advertising system based on Internet of Things and edge computing, which includes three layers: a cloud platform, an edge control terminal and IoT devices including dimming glass and smart projectors. The cloud platform manages the advertisement resources, sends out the play schedule and completes the identity authentication of the edge control terminal. The edge control terminal controls the addressing and networking of the play media consisting of dimming glass and smart projector, and carries out identity registration. At the same time, it completes the switching of the transmittance of the dimming glass and the signal synchronisation of the advertisements, then broadcasts the advertisements according to the schedule. The lightweight communication protocol MQTT is used between the layers to reduce the overhead of data transmission. Experiments show that the lightweight advertising system can manage and play advertisements efficiently with low latency and provide users with a good viewing experience.