Datasheet

Using the library interface is very easy. Start by creating the object with

Adafruit_24bargraph bar = Adafruit_24bargraph();

you can name it whatever you want, not just bar

Then initialize it with

bar.begin(0x70); // pass in the address

You can init with any address from 0x70 to 0x77, just make sure you solder in the matching solder jumpers!

Finally, write to the bargraph with

bar.setBar(

lednumber

ledcolor

);

Where

lednumber

is 0 thru 23.

ledcolor

can be LED_RED, LED_YELLOW, LED_GREEN or LED_OFF

The drawing routines only change the display memory kept by the Arduino. Don't forget to call bar.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.