using the mentioned changes hello_world example did compile and got uploaded to my core2. However , nothing is shown on screen, screen remains black.

@ajb2k3 The point of EZData is that it stores data in a cloud, making it accessible from anywhere in the world. Also, you can set up an mqtt server on a €30 Pi Nano, a NAS, or pretty much any other computer with a network connection.

Looks like it's sorted now after the easter long weekend.

@marcelusvictor Did you put the Cardputer into Download Mode as described here? https://docs.m5stack.com/en/core/Cardputer If Yes, check your device manager if the COM port appears without any error message. If it not apears then your USB cable may be broken or has power wires only (cross check with another one).

Hello @lasslop GPIO21 (pin 21) is not a lucky choice. By default GPIO21 is used as SDA (I2C). Have you tried with a different GPIO? Thanks Felix

I'm still at a loss with m5ez. It is very frustrating to "have" such a great framework that I'm unable to leverage. Are there any examples of someone using m5ez in a project that "does something"? An example of "does something" I mean like this ESP32 project I completed recently: https://www.facebook.com/144922416365/videos/743331992745660 it is a test bench I developed for ignition coils. The UI are the three buttons on the right and the display is simply a right side for status and left side for control. This kind of UI is how most of my programs work... a continuous presentation of status or information and some instruction about control. As I rework a prior test bench into a new version controlled by ESP32, I'm driven to inaction because of how unfriendly m5ez is to utilize.

I'm going to be cheeky here and say if this is Arduino then look at the first line of your code. Hint its whats not there that is the issue.

Hi Bob, I don't check this forum that regularly, so you're kind of lucky I see this. It's best to open an issue on the M5ez github. As for your question: ez.buttons.poll() should return the key pressed, or an empty string if nothing is pressed, so you are presumably calling it from inside a loop? If you have nothing else to do in that loop and just want the the code to wait for a keypress, use ez.buttons.wait() instead. Let me know if this was not the issue, and in that case maybe show the code. Rop

Having fun with m5ez [image: 1540462766896-img_0144-resized.jpg] Now i am a copy and paste my own code .... coder.... Copied my slider and made a mechanism that selects and sets each slider. Next and previous makes you jump between each slider, left and right sets the value , ok publishes the value and up gets you back to the main menu. I still have issues to get my values in to m5ez object like the header, text works fine but int is still a issue. Tried to convert them to chars, but failed.... So much to learn at once.