If you want to learn how to do it from your phone, you should first be able to do it with the Serial monitor. What are you currently using to display something on the cube? Could you post your code and an example picture or video?
If you want to learn how to do it from your phone, you should first be able to do it with the Serial monitor. What are you currently using to display something on the cube? Could you post your code and an example picture or video?