Just a helpful note to anyone who might run into this later: I connected the serial lcd to my arduino and wrote a sketch to cycle through the brightness settings on the backlight. Somehow in my infinite wisdom I managed to turn the backlight off where it would NOT come back on. I tried the 0x7C followed by 0x9D to set to full brightness with still no luck. I finally realized to look through the firmware and noticed there is another command that turns the backlight on and off (with no mention in sparkfun’s quickstart guide). You still send the 0x7C but you follow it with 0x01 (0x02 turns it off!). I just thought I’d share that with anyone who might be puzzled as I was.
↧