I can easily use Arduino UNO's pin3( TXD) and pin 4( RXD) to be able communicate with another device using UART on that device. Is it possible to use Arduino Uno so that it can communicate with the device using RS232? Or must I use voltage level convertor? Thanks

UART and RS232 - how to use with Arduino - #6 by system - Interfacing w/ Software on the Computer

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