I am doing a project on matrix LED driver circuit that its contents can be changed by the message. Who has the experience can help me to share programming code . Thanks alot 
Who has the experience can help me to share programming code
YOU need to break the project down into manageable steps. One would be to be able to display something (it does not matter what) on the LED matrix. Even lighting up one pixel, in white, would be a good first step.
Then, you need to be able to display a single letter. It will be up to you to map out which pixels need to be lit up to display the particular letter.
Repeat that process for each letter. Don't forget that you may want to use upper and lower case letters. And numbers and punctuation.
Then, learn how to read a text message and print the data to the serial port. Next, learn how to save the whole message in an array. Next, learn how to extract just the data to be shown. Finally, show that data.
Scrolling might be necessary, so plan for that.
PaulS:
Then, learn how to read a text message and print the data to the serial port. Next, learn how to save the whole message in an array. Next, learn how to extract just the data to be shown. Finally, show that data.Scrolling might be necessary, so plan for that.
I 'm stuck in this step.
I do not know how to transfer content message from SMS to display the LED matrix module?