Hi everyone, I've followed this videos instructions, but the lcd screen doesn't show anything work, the ultrasonic sensor definitely works since I've tested it using the serial monitor. The lcd worked a while back but I haven't used it in a long time, it only showed some flashing lines today, after that it hasn't shown anything. Is there some simple code to check if the lcd works at all? I don't get why it wouldn't work, since it worked the last time I used it. The code is the same as the video, as are the connections.
