You can download the code and check it out. This simple sketch is going to scroll a word across the screen. One of the cool things (I think) about these displays are using them to scroll text. For I2CĪdafruit_8x8matrix matrix = Adafruit_8x8matrix() I do this to make sure I know where 0, 0 is for sure also. The first sketch is little more than turn on LEDs to light up a T. You won't find all libraries here, but a good many of them.

You can find it in the IDE Sketch -> Include Library -> Manage Library. You can install them from within the IDE and it will keep an eye out if there are any updates. I find an easier way is to use the Arduino IDE Library manger. In that case, create a folder named libraries. If there isn't a folder, it may be the first library being installed. They need to be installed into your ArduionSketchFolder/libraries (e.g. The Adafruit_LED_Backpack library and Adafruit-GFX-Library found out on Github are used for this write-up. I have been very impressed with the work they have put into the libraries they create. In one instance, I had to change the address in the library before the device would work.īefore we can start to work on our sketches it is time to get some libraries. It is possible to override it in a sketch. The address is usually changed via hardware. After running it on this display I found it to have the address of 0x70. Once I have it wired up I like to run an I2C Scanner to make sure the device is up and running and also to confirm what address it will be using.

Ccs adding the wire library to project