I found another thread the talked about a bug in the example sketch and I got the captions coming out the serial port. The issue is that XDS data is scattered in with the captions. I can’t verify anything about the control codes that surround the XDS data that would allow me to exclude it. Sometimes it shows up in the middle of captions; even in the middle of words which makes processing the words impossible. It also makes the lines break in the middle of words sometimes too. My TV decodes the captions correctly without the XDS data being displayed on the screen so I assume this is totally doable I’m just not sure how to do it 🙂
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Right now everything is jumbled together. For example if the closed captioning text says “how was your day” and the call sign was “CCC” you might see something like “hoCw was yCour daCy”. A TV doesn’t show this, it only shows the correct information.