Here's an example code for connecting an Arduino Uno to an LCD1602 display without using the I2C interface:

#include [[LiquidCrystal.h]] LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // Set the LCD pin connections void setup() { lcd.begin(16, 2); // Initialize the LCD lcd.setCursor(0, 0); // Set the cursor to the first column of the first row lcd.print("Hello, World!"); // Display the text } void loop() { // Your code here }

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Now, let's explain the code step by step:

We include the LiquidCrystal library, which provides functions to control the LCD1602 display without the I2C interface.

We create an instance of the LiquidCrystal class called lcd. We specify the Arduino pin connections for RS (Register Select), Enable, and Data pins (D4, D5, D6, D7, respectively). Additionally, we specify the LCD pins for the backlight (A and K) as 12 and 11.

In the setup() function, we initialize the LCD using lcd.begin(16, 2). This tells the LCD to expect a display with 16 columns and 2 rows.

We set the cursor to the first column of the first row using lcd.setCursor(0, 0).

Finally, we use lcd.print() to display the text "Hello, World!" on the LCD.

The loop() function is left empty in this example, but you can add your own code to perform actions or update the display continuously.

To use this code, you'll need to install the LiquidCrystal library. You can do this by navigating to "Sketch" -> "Include Library" -> "Manage Libraries" in the Arduino IDE, searching for "LiquidCrystal," and installing the library by Arduino.

Remember to connect the Arduino Uno to the LCD1602 display according to the pin connections specified in the code.

This code provides a basic starting point for interfacing an Arduino Uno with an LCD1602 display without using the I2C interface. Feel free to modify and expand upon it to suit your project requirements.