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Google isn't returning anything useful for "7912 display"... did you mean MAX7219? That repo you linked should be able to drive it, as it's using https://github.com/MajicDesigns/MD_MAX72XX
I use LedMatrixDriver instead for my stock/crypto ticker. Mine is based on an ESP32 though. If interested in my code let me know.
For future me - If you're looking for a quick, real time, working 8266 + max7219 display. https://github.com/nebman/btc-ticker-esp8266
From a recent post with a different display https://github.com/conorwalsh/esp8266-crypto
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