Arduino MEGA2560 and LCD 44780

[stregato]

I'm probably missing out on a glass of water
I can not run with 20x4 LCD Arduino Mega2560 44780
I tried it as an example: lcd printing message in the examples V6
I state that in the tests using the protocol 4bit
I tried with the PORT_A PORT_B
Nothing to do anybody can help me Thanks

[Benj]

Hello,

Can you please attach your Flowcode program and maybe a simple explanation of how you have wired up the LCD to your Arduino and we will do our best to try and spot what's going wrong.

[stregato]

thanks benj
I was just missing out on a glass of water
I forgot to bring to earth the R / W pin of the LCD
I apologize