##### API Description

There are three working modes for electronic price tags: MQTT, HTTP, and HTTP-SERVER

##### Mode Introduction

- [MQTT](./MQTT/README.md)  
    This working mode requires the establishment of an MQTT server (for sending notification messages to electronic price tags) and an HTTP server (for managing the content of price tag screens. Electronic price tags receive MQTT notifications and obtain price tag details from this server)
- [HTTP](./HTTP/README.md)  
    This working mode requires the establishment of an HTTP server (used to manage the content of the price tag screen, and obtain price tag details through electronic polling from this server)
- [HTTP-SERVER](./HTTP-SERVER/README.md)  
    In this working mode, the built-in HTTP service of the electronic price tag can be used to develop PC or mobile clients to access the built-in HTTP service of the price tag and synchronize the content of the price tag