LCD

Other Hardware Displays
1

Hello.
I've prepared my code for LCD where I just want it to display words after specified period. I used the LC library and use the command (lcd.print("")) but the problem is that no thing showed up in the LCD. I thought the problem is related to the potentiometer so I changed its resistance from 250 kilo-ohm to 10 kilo-ohm, the words appeared but it disappeared although it is stated in the setup loop!

2

Please post your full sketch.

If possible, you should always post code directly in the forum thread as text using code tags:

  • Do an Auto Format (Tools > Auto Format in the Arduino IDE or Ctrl + B in the Arduino Web Editor) on your code. This will make it easier for you to spot bugs and make it easier for us to read.
  • In the Arduino IDE or Arduino Web Editor, click on the window that contains your sketch code.
  • Press "Ctrl + A". This will select all the text.
  • Press "Ctrl + C". This will copy the selected text to the clipboard.
  • In a forum reply here, click the "Reply" button.
  • click on the reply field.
  • Click the </> button on the forum toolbar. This will add the forum's code tags markup to your reply.
  • Press "Ctrl + V". This will paste the sketch between the code tags.
  • Move the cursor outside of the code tags before you add any additional text to your reply.
  • Repeat the above process if your sketch has multiple tabs.

This will make it easy for anyone to look at it, which will increase the likelihood of you getting help.

If the sketch is longer than the 9000 characters maximum allowed by the forum, then it's OK to add it as an attachment. After clicking the "Reply" button, you will see an "Attachments and other settings" link that will allow you to make the attachment.

When your code requires a library that's not included with the Arduino IDE please post a link (using the chain links icon on the forum toolbar to make it clickable) to where you downloaded that library from or if you installed it using Library Manger (Sketch > Include Library > Manage Libraries in the Arduino IDE or Libraries > Library Manager in the Arduino Web Editor) then say so and state the full name of the library.

3

Perhaps equally important as showing your code.

Explain:

What LCD? :astonished: Tell us what it is. Give a Web link to the listing from where you purchased it or the site where it is featured by the manufacturer.

We presume from your choice of this forum that you are connecting it to an Arduino. What Arduino?

Show a picture of how you have connected it - as this is often the problem. Do not take pictures in your dark room. Take it outside into full daylight but not direct sun and ensure the picture is perfectly focused - even if it takes a couple of attempts.