I have been using a simple 16x2 LCD for a while now without any problems. I just got one graphic LCD from Sparkfun with a graphic LCD backpack pre-soldered to the LCD and I am having problems displaying anything.
I have been reading that everyone suggests to update the firmware on the backpack but I do not have the equipment to do that.
Isn’t there a way to make a simple “hello world” program work without any tweeking or modifying?
I connect 5V pin on arduino to the Vin pin on the backpack,
I connect GND pin on arduino to GND on backpack.
I connect A5 pin on arduino to RX on backpack.
I connect A4 pin on arduino to TX on backpack.