Datasheet

Once you're happy that the matrix works, you can write your own sketches. The 8x8 matrix supports everything the

Adafruit GFX library - drawing pixels, lines, rectangles, circles, triangles, roundrects, and small bitmaps. For more details

check out the GFX page which will detail all of the GFX routines (https://adafru.it/aPx).

All the drawing routines only change the display memory kept by the Arduino. Don't forget to call writeDisplay() after

drawing to 'save' the memory out to the matrix via I2C.

There are also a few small routines that are special to the matrix:

setBrightness(

brightness

)- will let you change the overall brightness of the entire display. 0 is least bright, 15 is

brightest and is what is initialized by the display when you start

blinkRate(

rate

) - You can blink the entire display. 0 is no blinking. 1, 2 or 3 is for display blinking.

The default orientation for graphics commands on this

display places pixel (0,0) at the top-left when the header

is at the left and Adafruit logo at the right. To use the

matrix as shown above (header at top, logo at bottom),

call matrix.setRotation(3) before issuing graphics

commands.