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http://dx.doi.org/10.22156/CS4SMB.2019.9.9.038

A Study on the Microcontroller Input Port Reduction of IoT Equipments with Mixed Digital and Analog Inputs  

Lee, Hyun-Chang (Division of Information & Telecommunications, Kongju National University)
Publication Information
Journal of Convergence for Information Technology / v.9, no.9, 2019 , pp. 38-43 More about this Journal
Abstract
In this paper, a method of inputting one analog input and two digital switch inputs by using one analog port of microcontroller embedded in IoT device was proposed. In this method, the upper limit and the lower limit of the input voltage range of the analog input port are determined, and the analog input voltage is input to this interval. The digital switches are configured to exceed the boundaries of the upper and lower limits, respectively. To verify the performance of the proposed method, an experimental circuit was constructed and tested using a microcontroller. As a result, all three inputs can be sensed using a single analog port, thus confirming that the three required input ports are reduced to one input port, ie, 33%.
Keywords
IoT; Microcontroller; Analog; Digital; Input port;
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Times Cited By KSCI : 4  (Citation Analysis)
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