The tutorial for the LCD screen will use the basic 1602 type from Hitachi!! This has been cloned to death... Everyone has a copy of this chip set down to mimicking its every function..
I use “Displaytech” and “Fordata” mainly because of the cost... I'm certainly not advertising them.. Use whatever you have... But they have served me well over the past few years...
To use these devices you have to set them up before you can use them.... The chip set can use a variety of sizes, the main ones...