Electronic price tag, electronic price tag system and method of updating electronic price tag

A method of updating an electronic price tag, comprising:

• acquiring by a handheld terminal an identifier of the electronic price tag and an item identifier on a corresponding shelf, binding the identifier of the electronic price tag with the item identifier to generate binding information, and sending the binding information to a server;
• receiving by a server the binding information, acquiring the identifier of the electronic price tag and the item identifier, and sending item information corresponding to the item identifier to the electronic price tag;
• and
• receiving and displaying by the electronic price tag the item information, and sending information indicating that the electronic price tag is normal or information indicating that the electronic price tag is abnormal to the server in real time, wherein
• the electronic price tag comprises a reed switch sensor and a processor,
• the reed switch sensor is configured to sense a magnetic field adjacent to the electronic price tag to generate an output signal, and
• the processor is configured to:
• receive the output signal of the reed switch sensor, convert the output signal into information indicating whether the electronic price tag is normal, and send the information indicating whether the electronic price tag is normal.