... using MCU51 or ARM as control unit with a GPRS module and a function mudule like RFID. If we use HUAYU Development Module ... , we only need a RFID module, and the system itself ... ,ADC,GPIO,parallel interface) Software Resource1, OS: MTK Nucleus, a RTOS2, GUI like WIN323, programming language: C & Java (J2ME) Documentsa whole set ...