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Amazon

amazon.com › serial-port-hdmi › s

Amazon.com: Serial Port To Hdmi

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Discussions

cables - Serial DB9 to Serial 3.5mm over HDMI cabling - Electrical Engineering Stack Exchange

Good afternoon everyone. I am trying to control a Samsung TV via Serial from a remote processor and I am trying to use spare installed HDMI cabling to do it. Samsung does not have an open API for... More on electronics.stackexchange.com

electronics.stackexchange.com

May 14, 2017

Serial Port connected thru HDMI... Kinda works and now I have questions - Electrical Engineering Stack Exchange

What it takes to be a player in the international AI... ... 0 How do I tell a serial port settings, when the hardware documentation doesn't have any info about it? 2 Questions regarding using an HDMI cable to transmit SPI, I2C, and UART serial data? More on electronics.stackexchange.com

electronics.stackexchange.com

June 19, 2024

9-Pin VGA to HDMI Help

That isn't VGA, it's a serial port. The actual VGA port is on the video card, you can see it near the audio ports. More on reddit.com

r/computers

April 15, 2024

Help what hdmi adapter do I get??

That is a serial port and not intended for any graphic connections. More on reddit.com

r/computers

172

1831

April 4, 2025

Videos

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How To Connect A Serial Device Using USB Video | C2G

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Need a Serial Port on your laptop or computer? Usb to Serial Port ...

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How to Convert VGA to HDMI - YouTube

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HDMI, DisplayPort, DVI, VGA: Which cable should I use? - YouTube

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startech.com

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reddit.com › r/commercialav › connecting to an hdmi matrix using rs232 usb to ttl cable

r/CommercialAV on Reddit: Connecting to an HDMI matrix using RS232 USB to TTL cable

January 7, 2024 -

Hi,

I'm trying to connect to the HDMI matrix (AV Access Professional 4x2 4K@60Hz HDMI 2.0 Matrix Switch) using Prolific PL2303TA cable. Latest cable driver is installed correctly and is recognized by windows. I connect TTL pins directly into the matrix (it has RS232 terminal block): Green - Tx, White - Rx, Black - G.

I've tried Putty and Serial Debug Assistant, port is opened successfully, but no response is received. RS232 settings are correct as per official documentation https://www.avaccess.com/wp-content/uploads/2023/12/API-Command-Set_-4KMX42-H2A-V1.0.1.pdf

Any advice is very welcome

Upd: problemo solved, connecting a TTL into RS232 is no go

Top answer

1 of 3

Looking at the specs for that interface it appears that white is the rx of the adaptor which should connect to the tx of matrix, and green is the tx of the adaptor, which should go to the rx of the matrix. So, try swapping rx and tx and see if that gets you any closer

2 of 3

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Dtech

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Stack Exchange

electronics.stackexchange.com › questions › 305300 › serial-db9-to-serial-3-5mm-over-hdmi-cabling

cables - Serial DB9 to Serial 3.5mm over HDMI cabling - Electrical Engineering Stack Exchange

Top answer

1 of 1

Using an HDMI cable for rs232 isn't a problem. A cable is a cable is a cable. As long as you are sure it won't be plugged into an HDMI device by mistake (typically not a problem in one off hobby projects). And length may be an issue, as forgiving as rs232 is. A few feet isn't a problem though.

Making your own adapters is the only practical solution you have. Get a db9 dongle and a HDMI connector. If wiring small pins is an issue, there are prewired db9 pigtails and something like this

The second adapter would be HDMI to a 3.5mm Jack or pigtail.

Find elsewhere

Google Bing Mojeek

Amazon

amazon.com › Best-Sellers-Serial-Adapters › zgbs › pc › 3015401011

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eBay

ebay.com › electronics › computers/tablets & networking › computer cables & connectors › parallel, serial & ps/2 › hdmi parallel, serial & ps/2 cables & adapters

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YouTube

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How to connect your HDMI device to your old VGA (serial) monitor. - YouTube

05:42

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Alibaba

alibaba.com › showroom › rs232-to-hdmi-cable.html

In Stock RS232 to HDMI Cable Supports 4k@60Hz Resolution | Alibaba.com

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Stack Exchange

electronics.stackexchange.com › questions › 716900 › serial-port-connected-thru-hdmi-kinda-works-and-now-i-have-questions

Serial Port connected thru HDMI... Kinda works and now I have questions - Electrical Engineering Stack Exchange

Top answer

1 of 1

When you said "these little microcomputers" I assumed that you had Raspberry Pi or similar single board computers.

However, since you have Windows 10 PCs, the simple and obvious solution is to use an USB<->RS232 interface - these are readily available from Amazon, if not at your local computer shop.

You are not likely to find a modern computer with a real DE-9 serial port.

reddit.com › r/computers › 9-pin vga to hdmi help

r/computers on Reddit: 9-Pin VGA to HDMI Help

April 15, 2024 -

Hello, I’m writing this post because I have looked everywhere and I sincerely don’t know where else to go but to ask you all who are well-versed in computational technology.

EXPOSITION — I have an old PC tower that belongs to my family and we want to see if there are any pictures/videos on it before we decide to finally retire it. It has been sitting in our guest room closet for YEARS and when I took a look at the back of the tower to connect it to my modern monitor, I found there was a male 9-pin VGA port instead of an HDMI/USB-C port.

In light of this, I tried looking online for a female 9-pin VGA to HDMI converter and alternatives to that as well. I found 15-pin VGA cables, HDMI-to-VGA converters, but nothing for my specific case. I’ve been searching for more than a week now and I think I’m reaching the end of my wits here.

MY QUERY — Is there actually any way to convert a male 9-pin VGA signal to a male HDMI port to connect my old PC tower to my newer LG monitor? If it is possible, do you happen to know how to do that?

My family and I would immensely appreciate any help you can provide, thank you so much!

Top answer

1 of 5

That isn't VGA, it's a serial port. The actual VGA port is on the video card, you can see it near the audio ports.

2 of 5

This HAS to be a shitpost... or I'm just getting old.

Dtech

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Type-C To HDMI Adapter,RS232 To RS485 Converter,USB Extension Cable Supplier

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Alibaba

electronics.alibaba.com › buyingguides › rs232-to-hdmi-converter-what-you-actually-need

RS232 to HDMI Converter Guide: How to Choose Right

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Target

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reddit.com › r/computers › help what hdmi adapter do i get??

r/computers on Reddit: Help what hdmi adapter do I get??

April 4, 2025 -

Idk if this is the right sub or even the right way to ask this ; My pc has no HDMI port but has this, and I've heard it could replace HDMI with an adapter. Is it true? If it is well I don't know what adapter to search for. Google Lens didn't really help. Anyone knows??

Top answer

1 of 59

1203

That is a serial port and not intended for any graphic connections.

2 of 59

245

That's a serial port, it doesn't output video. What you're looking for is VGA which is dark blue and has empty holes rather than pins.