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Are there unused data pins on the silent mainboard?

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Joined: 4 months ago
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I am trying to make a messaging system for my ender 5 plus. so it sends a text to my phone when a print is ready. I saw a video on youtube of a Prusa printer having an extra unused data pin where you could send data over. I'm trying to find the same kind of pin on my ender 5 plus with a silent board. Does anyone know If my idea is even possible?