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Sardfxul MAX3232 3V to 5V DB9 Female RS232 Serial Prot to TTL Converter Module Root Connector for Arduino Microcontrollers - Walmart.com
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Serial (RS232) Interfacing Between Arduino With Computer Using SoftwareSerial Library | Robotics University
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RS-232 Arduino Mega XBee Data Shield - Leeman Geophysical
Arduino UNO control of RS232 Equipment - Project Guidance - Arduino Forum
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Arduino Board Serial | Arduino Documentation
