I'm newbie with arduino and I have strange problem with display. I use Arduino Ethernet with 1602display (Hitachi HD44780 controller) with serial controller. Every 2sec I send new strings on display. And sometimes (2-3 times within a minute) I got strange chars on display. This is my code
Serial.print(12, BYTE); //clear LCD Serial.print(1,BYTE); //move to the Home Serial.print("Voltage: "); Serial.println(voltage); Serial.print(13, BYTE); Serial.print("Temp.: "); Serial.println(temperature); Serial.print(4, BYTE); delay(2000);
and on this video you can see what's happening.
What I'm doing wrong and how can I fix this?