Help Needed with Interfacing an LCD Display with Arduino Uno

Hardware UNO R4 UNO R4 WiFi
1

I'm working on a project where I need to interface a 16x2 LCD display with my Arduino Uno. I've connected the LCD using the standard 4-bit mode wiring as shown in many tutorials, but I'm having trouble getting it to display any text. my hesco online bill getting high without issue is getting resolved

Here are the steps I've followed so far:

  1. Connected the RS, E, D4, D5, D6, and D7 pins of the LCD to digital pins 12, 11, 5, 4, 3, and 2 on the Arduino.
  2. Connected the VSS and RW pins to ground, and VDD to 5V.
  3. Connected a potentiometer to the VO pin to adjust the contrast.
  4. Installed the LiquidCrystal library in the Arduino IDE.
  5. Uploaded a simple "Hello, World!" sketch to the Arduino.

However, the display just shows a blank screen or sometimes blocks in the first row. I've tried adjusting the contrast and double-checked the wiring, but I can't seem to figure out what’s wrong.

Thank you!

2

So you tried like this ... can you share picture of your setup

3

Sorry, but is this topic in the right category? You call your device an Uno, which suggests a Classic Uno, but here we are in the Uno R4 Wifi category. If it's really an R4 Wifi, say so, if it's a classic R3, please request that a moderator move it.

1 Like
4

Hi, @fernandezmarshall
Welcome to the forum.

Can you please post a copy of your circuit, a picture of a hand drawn circuit in jpg, png?
Hand drawn and photographed is perfectly acceptable.
Please include ALL hardware, power supplies, component names and pin labels.

Can you post some images of your project?
So we can see your component layout.

Which is it , UNO R3 or UNO R4 WiFi?

Thanks.. Tom.. :smiley: :+1: :coffee: :australia: