Hall Research RS-232 Serial Device with Digital I/O IR Play and Learn

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The Hall Research HR-4P is a programmable RS-232 system capable of controlling and automating a Projector, LCD, or any other unit with serial or IR port. The unit includes four (4) configurable I/O lines that you can define individually to works as input or output. Configuring the HR-4P as an input allows it detect voltage levels or contact closure. It senses either “low-to-high” and “high-to-low” transitions then issues programmed Serial RS- 232 commands and IR Commands for controlling IR-equipped devices.

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