Design and Implementation of Automatic Vending Machine Based on the Short Massage Payment

A design of vending machine based on the short massage payment with the main control module M68HC11 and GPRS module MC35 has been illustrated. This paper describes the working program of the system and especially the MDB bus and photoelectric conversing circuit and MC35 module are presented. A structure of vending machine is designed, the hardware ideas of bus conversion interface, the software protocol rules based on AT command and the way to use short message payment are given out.