OpenSprinkler › Forums › Hardware Questions › DIY Kit Assembly Questions › LCD no backlight, first row blocks, second row empty › Reply To: LCD no backlight, first row blocks, second row empty
January 8, 2017 at 3:44 pm #45158
To debug, plug in a USB cable connected to your computer, and launch a serial monitor. This is the same as how you see serial printout on an Arduino. So perhaps you can take a look at a couple of Arduino serial tutorials.