Thank you, too. But despite all my experiments I could not run "Custom dial widget example". I want to make a speedometer and keep a record on sd card. Sd recording ok. But the gui is not okay. can you help me please. By the end of the project, I absolutely share in the forum. Thank you for your interest.
I did this project, but the processor arduino. I want to do it again with stm32f746. I expect support from you.