Design of the electronic bulletin board based on wireless sensor

摘要

This paper aims to introduce the electronic bulletin board based on wireless sensor. It can make use of the existing GSM mobile base station coverage. Through the way of group messaging, it can broadcast the notice-information in the first time, so that the masses can understand all aspects of information from the information screen. There are two basic functions in the system: the communication is realized by using MAX232 between MCU and GSM MODEM; When receiving the short message which is requested to update the data in the detection point, The testing personnel can detect current data and send it back to the GSM MODEM through the mobile phone, and the micro-controller can read the message content with AT instruction. After MCU editing the data information, it can be displayed on the LCD the screen.