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I'm a bit out of my league on this one. I need to take realtime data from a serial source and display it in a "retail display" type of fashion. My PLC sends data out via RS232 (I also have RF485 ...
A MAX7219 drives the display, and the brains are an ATmega8. It’s straightforward to send new values: a start byte, a CRC, the data to display, and an end byte.
It decodes this data, and processes it to pull out parameters like speed, RPM. It then drives an LCD display on the double-DIN stereo in the dash.
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