Abstract
Making use of Cortex M3 processor, a multi-channel wireless alarm is proposed in this paper (patent number: 201220357699.3). The proposed multi-channel wireless alarm can be used in the place where have a large number and dense monitoring points. In order to realize the target of one receiving unit and many transmitting units, the modules of PT2262/PT2272 and STM32F103RBT6 microcontroller which had Cortex M3 core were used in this system. Compared with the traditional 80C51 microcontroller systems, this design overcome the disadvantage of the IO ports of 80C51 microcontroller which only have the high level and low level stages. This disadvantage make 80C51 microcontroller could not full use the addressing ability of PT2272 address pins which could be high resistance, high level and low level stages, So the design of this paper effectively expanding the number of alarm system monitoring.
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