Your TV’s RS-232 port is a versatile automation tool – how to unlock its full potential
Adam Breeden/ZDNET Follow ZDNET: Add us as a preferred source on Google. Most TV ports go unnoticed once everything is plugged in — except perhaps HDMI and USB. But for advanced users, the RS-232 serial port can be a powerful tool for fine-tuned home theater and smart device control. Also: I found 7 low-cost ways to make my TV sound a lot better (even without a soundbar) With some patience and more than a little know-how, you can create a fully automated home entertainment system with timed content, simultaneous broadcasts to multiple rooms, and even diagnostic testing. What is an RS-232 serial port, and what does it do? Take a peek at the back of your TV, and you may see — among the familiar HDMI and USB connections — an odd 9-pin port that doesn’t match any cable you have in the house (and may look familiar if you used a printer back in the 1990s). This is your TV’s RS-232 serial port, normally reserved for connecting professional calibration and diagnostic tools. Technicians …









