An API that lets you display numbers and letters on Neo7Segment RGB LED displays that are available from tindie
You can find the Open Source hardware PCB design and Gerber files here
The downloaded code should be added to your arduino IDE libraries folder, and the library requires the Adafruit NeoPixel library for it to function.
To include the Neo7Segment library in your project:
#include <Neo7Segment.h>
You can then initialise the display with the following line that includes the number of Neo7Segment digits and the GPIO to control them:
Neo7Segment disp( 5, 4 );
You then start the display with the bebin method, passing the brightness:
disp.Begin(20);
The you simply pass the display the String you would like displayed and a color:
disp.DisplayText( "1234", disp.Color( 255,0,0) );
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