Metro Wireless Recruit Assistance System

A wireless rescue system for (MTR) is designed in this work. It realized the MTR station passenger requests for assistance so that problems can be resolved in a timely manner.This system consists of two parts: Host computer and multiple ext. It adopts wireless network and multi-CPU technique. The wireless communication can avoid shortcomings of the remote wire transmission, such as large wastage, high cost, and etc. Each Host computer is made of two (MCU AT89C2051). The main MCU is in charge of the control and communication with the communication MCU. The communication MCU is used to receiving and sending data in wireless communication. The ext uses on MCU as the core to receiving and sending data in the wireless communication. A complete communication protocol is defined for the wireless communication. (CRC) technology is adopted to verify data and guarantee the dependability in the wireless communication. The main MCU communicates with the PC through a RS-232 port. A serial communication protocol is also defined, which can help the main MCU communicate with the configuration software that runs in the PC. The software is used to design the user interface, datas and turn to a database which is provided for the staff convenience.The paper introduces the realization of the software and hardware design. At the same time, it puts forward a wireless rescue system that can be applied to the MTR.