The use of IC cards to buy electricity for the room, LCD screen shows the remaining power, when the 0:00 left the room, LCD screen will be prompted to please the phrase prompted the purchase of electricity.

IC卡购电
........\CH451_B.c
........\IC_CARD_B.h
........\IIC_B.c
........\LCD_B.c
........\MAIN_B.c
........\SLE4442_B.c

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