My LCD module for the LCD twig arrived, and I tried to run Project 6 to demonstrate it. The LCD lights up brightly, but doesn’t show any characters. I tried adjusting the resistor on the twig, and that made parts of the LCD a bit dimmer but didn’t make characters appear. I do have the library software installed, and the sketch compiles correctly. I tried adding the dual-LED twig and some code to blink the LEDs when the LCD code does each step, and that blinked when I expected it to, but no characters appear on the LCD. And I checked that all my cable connections were tight and plugged in to the correct jacks, and I even swapped the cables in case the project directions were backwards, but it didn’t help.
How can I debug this? There’s no circuit diagram, and I’m only guessing that the resistor on the twig is adjustable, and it has no information about whether it only goes one turn or many. What do the other jacks on the LCD twig do - should the cables from the Stem actually use them instead of the ones it specifies?
Thanks; Bill – firstname.lastname@example.org