I, too, bought one of those cheap I2C LCD's thinking I'd just hook it up and start printing. Ha! So I started researching and found some answers here. The problem is the answer was WAY over my head. So I made a small strip board and wired an 18 directly to the LCD. The nice part is the I2C board powered the backlight and gave me contrast control. Downloaded the prog from here, changed the greeting and it worked - usually. Sometimes I'd have to switch it on a coupe of times for it to boot. Tried a different 18 but same thing. Now it won't initialize at all. I get 2 rows of light squares for a second then it clears and nothing.
I tried increasing the pauses in the init section and even put it in a loop to init 3x but the welcome message never shows.
Any ideas? Or just toss it a buy another?
I tried increasing the pauses in the init section and even put it in a loop to init 3x but the welcome message never shows.
Any ideas? Or just toss it a buy another?