iic i2c 1602 lcd module blue screen library files free sample

As we all know, though LCD and some other displays greatly enrich the man-machine interaction, they share a common weakness. When they are connected to a controller, multiple IOs will be occupied of the controller which has no so many outer ports. Also it restricts other functions of the controller. Therefore, LCD1602 with an I2C bus is developed to solve the problem.

I2C bus is a type of serial bus invented by PHLIPS. It is a high performance serial bus which has bus ruling and high or low speed device synchronization function required by multiple-host system. The blue potentiometer on the I2C LCD1602 (see the figure below) is used to adjust the backlight for better display. I²C uses only two bidirectional open-drain lines, Serial Data Line (SDA) and Serial Clock Line (SCL), pulled up with resistors. Typical voltages used are +5 V or +3.3 V although systems with other voltages are permitted.

Step 3:Since in some code, the libraries needed are not included in Arduino, so you need to add them before compiling. Unzip the downloaded file. Copy the folders under the Library folder to the libraries folder in Arduino (if you cannot find the path in Arduino, open Arduino IDE, click File ->Preferences, and you can see the path in the Browse box, as shown in the following diagram). Compile the program.

During the building of your projects for Arduino, you’ll often need to read the output data directly from a LCD display. In this lesson we will show how to mount a LCD display on your OSOYOO Basic Board using the I2C communication. Finally you will see how to program it with a simple example showing how to display text on the display.

The integration of an LCD display greatly facilitates the interactivity of the project you are developing, allowing the user to directly read some output parameters. These values can be either a simple text or numerical values read by the sensors, such as temperature or pressure, or even the number of cycles that the OSOYOO Basic Board is performing.

However, these displays have a small problem. When they are connected to a microcontroller (such as OSOYOO Basic Board for example), these displays require virtually many connection PINs occupying practically almost all available IO and leaving the multiprocessor few outputs for any other devices and sensors. This problem has been solved thanks to the communication on the I2C bus.

The LCD1602 display has an integrated microchip that manages this type of communication, and then all of the input and output information are limited to only two PINs (excluding power supply). I2C is a type of serial bus developed by Philips, which uses two bidirectional lines, called SDA (Serial Data Line) and SCL (Serial Clock Line). Both must be connected via pulled-up resistors. The usage voltages are standard as 5V and 3.3V.

The blue potentiometer on the I2C LCD1602 (see the figure below) is used to adjust the backlight for better display.And there is a jumper on the board, if you take away this jumper , the backlight will aways be off.

Then connect theI2C LCD 1602 Display module to the I2Cport of the Magic I/O shield (please move the switch on the board to 5V) with a 4-pinPNP cable as below:

Each device has an I2C address that it uses to accept commands or send messages. For Uno board, this address usually is 0x27. But sometimes the address might be changed 0x37,0x24 …., So let’s go and look for the one on your device.

To use the I2C protocol with an LCD display and OSOYOO Basic Board, there is a special library to be downloaded and included in the code. The name of this library is here) and extract the contents in the libraries folder of the Arduino IDE. You can do directly from the Arduino IDE, select Sketch > include Library > Add .ZIP libraryfrom the menu.

#include #include LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x27 for a 16 chars and 2 line display void setup() { lcd.init(); // initialize the lcd // Print a message to the LCD. lcd.backlight(); lcd.print("Hello, world!"); } void loop() { }

In this experiment, the sketch will make a connection between OSOYOO Basic Board and I2C LCD display and then print a text on two lines. The first line will display “Hello all !” and second the “Welcome to www.osoyoo.com !” message.The circuit and the board / port type settings are same as above example.

#include #include char array1[]=" Hello all ! "; //the string to print on the LCD char array2[]="Welcome to www.osoyoo.com "; //the string to print on the LCD int tim = 500; //the value of delay time // initialize the library with the numbers of the interface pins LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x27 for a 16 chars and 2 line display void setup() { lcd.init(); //initialize the lcd lcd.backlight(); //open the backlight } void loop() { lcd.setCursor(15,0); // set the cursor to column 15, line 0 for (int positionCounter1 = 0; positionCounter1 < 26; positionCounter1++) { lcd.scrollDisplayLeft(); //Scrolls the contents of the display one space to the left. lcd.print(array1[positionCounter1]); // Print a message to the LCD. delay(tim); //wait for 250 microseconds } lcd.clear(); //Clears the LCD screen and positions the cursor in the upper-left corner. lcd.setCursor(15,1); // set the cursor to column 15, line 1 for (int positionCounter = 0; positionCounter < 26; positionCounter++) { lcd.scrollDisplayLeft(); //Scrolls the contents of the display one space to the left. lcd.print(array2[positionCounter]); // Print a message to the LCD. delay(tim); //wait for 250 microseconds } lcd.clear(); //Clears the LCD screen and positions the cursor in the upper-left corner. }

Compile and upload this sketch to the OSOYOO Basic Board, you should now see your I2C LCD1602 display the flowing characters: “Hello all !” and “Welcome to www.osoyoo.com”

We will print a simple text on the LCD using Arduino UNO in this example. In this case, you control what is displayed on the Arduino readily. You only need four cables. Power, Ground, I2C data, and I2C clock.

The below line code adds the LCD library to your project. This consists of all the LCD-related functions. Since we are using the I2C version, we have included the standard LCD library made for the I2C version.#include

The following line of the code resets and initializes all the LCD registers and prepares them for project usage. This function will be called only once in thesetup()function.lcd.init();

To turn on the backlight, you can use the below code. You will be able to see the contents of the display without a backlight, too, if it is a green LCD. Backlight, nevertheless, makes the project more beautiful and reading crisper.lcd.backlight();

The first parameter tells the position column-wise (0indicated first place,1indicates the second place, and so on). The second parameter tells the row number. We have only two rows (0and1).lcd.setCursor(1, 0);

This completes a basic introduction to the LCD as well as an example project to start the LCD exploration. In the coming sections, we will see different projects as soon as possible