Microcontrollersrn(MCUs) can bernclassified in many waysrnby different criteria.rnBut, for this article, wernwill divide them intornonly two categories:rnthe ones thatrnalready have arnbuilt-in serial portrnand the ones thatrndon't.rnWe all know thernimportance of serialrndata communicationsrnto our daily life andrnthe convenience ofrnusing microprocessorsrnin achieving this goal.rnSo, what do you dornif you have arnmicrocontroller thatrndoes not have arnbuilt-in serial port?
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