The 16×2 LCD is a widely used part for Arduino projects. It provides an easy way to show text output and graphics. While it’s cheap and simple to use, it does have some problems. Let’s look at how to use it with Arduino and limitation and their solutions
How to Use a 16×2 LCD with Arduino
To start, connect the LCD to Arduino. If you’re using an I2C, only four wires (VCC, GND, SDA, SCL) are needed. Once connections are made text can be uploaded. Non-I2C versions require more wiring, as you’ll need additional pins for control and data.
Limitations and Solutions
1. Small Display Size: It can be only used to display 32 characters.
Solution: Add an option to scroll text or use multiple LCDs or use a 20×4 LCD or an OLED display.
2. Low Brightness: The display cannot be read under Sunlight.
Solution: Adjust the contrast (non-I2C) or backlight settings (I2C). Use a brighter display like OLED.
3. Customization Limits: The LCD can’t be used to display custom fonts or complex graphics.
Solution: Create simple custom characters.
4. Power Consumption: The backlight can consume battery fast.
Solution: Turn off the backlight when not in use or reduce its brightness.
5. Too many Wires(Without I2C): Many wires need to be connected to the microcontroller creating an unavoidable mess.
Solution: Use an I2C module to reduce the wires required.
6. Lag in Screen Update: Updating the entire screen causes a slight delay.
Solution: Update only the specific areas that need to be changed to improve speed.
