introduction
A wireless passenger assistance system suitable for subway station environments has been designed with wireless transceiver modules, microcontrollers, and relays.

2 System Design

To meet the design requirements of the wireless passenger assistance system, each part of the 3503EC1 system needs to have the following functions:

Station computer: System monitoring virtual instrument, displaying the number, distribution, and real-time status of various help seeking terminals; The help response button and all response buttons respond to the help signal of the corresponding help terminal or all help signals; The help clear button and the all clear button clear the help signal of the corresponding help terminal or all help signals; System status check button to check if all help seeking terminals are working properly.

Management terminal: interface module for communication with station computers; Wireless transceiver module, communicating with the help seeking terminal; A microcontroller controls the operation of the serial interface and wireless transceiver module, and transmits and stores relevant information.

Help terminal: Help button, 3503EC1 for passengers to use when seeking help; Help indicator light, indicating whether passengers have been responded to for help; Wireless transceiver module, communicating with management terminals; A microcontroller controls the operation of buttons, indicator lights, and wireless transceiver modules, and stores and transmits relevant information.