I've build a rallytripmaster based on an arduino uno which 7 segments displays. It works fine, but I want to change the segments to a touchscreen.
Because there seems to be much options, I don't know exactly what to buy.
there are shields which TFS screens, but the it seems to be hard to get access to the other digital in lines I need to use to connect a magnetic switch to it. What should be a good solution when using shields to get access to pins not used by the shield?
Are screens from for example Nextion with a serial interface easy to use and fast to be updated by the arduino?
Are screens with an I2C connection better/worse/preferable over serial?
If you have experience with special brands/types, can you share your experience?