In this tutorial, you will see how to connect i2c LCD display (Liquid Crystal Display) to Arduino using the i2c module.

This is how to make your own LCD timer, just with an Arduino, a LCD screen and some hook-up wires. This IC can control until 16 digital devices like button or LED with only two pins.

In this tutorial we will discuss on PCF8574 I2C LCD Display Interface.

One of the best things about using I2C is we can reduce the connections (wiring).

OLED display based on a SSD1306 OLED driver IC. I would be grateful for help: I copied the libraries and with wire.h everything is fine, but Arduino cant’t find LiquidCrystal_I2C.h library. 37,365 views; 11 comments; 29 respects; This alarm clock and timer work without the help of a computer. Here we just use 4 wires. The article was very useful and the circuit is working fine, Thank you so much for sharing your experience and knowledge.Enter your email address to subscribe to this blog and receive notifications of new posts by email.To connect LCD display 16×2 or 20×4 to Arduino you know you’ll need at least 6 wires to connect, it means sacrificing some IO’s that could be used for connecting other components such as sensors or motors. Bonjour, j'ai un arduino Mega 2560 et une horloge RTC DS1307 en I2C et un LCD 20*4 en I2C , j'ai fait le sketch suivant : #include #include

This method is used for scanning the I2C Device inside your module that connected to I2C bus in Arduino (SDA, SCL).

In Arduino Uno / Nano / Pro Mini I2C bus is connected to A4 (SDA) and A5 (SCL), for Arduino Mega 2560 I2C bus is connected to D20 (SDA) and D21 (SCL) Here I am going to show you how to scan I2C address with a simple code. How to connect and program the Geekcreit 0.96 inch 4 pin white I2C OLED module with Arduino. For Uno R3 , the I2C connections are on SDA=A4 and SCL=A5. Thanks! For Mega2560 , the I2C connections are on SDA=20 and SCL=21.

This only consumes two I/O pins and they aren’t even part of the set of digital I/O pins. Before starting this article we will see what is i2c. I2C protocol is also known as 2 line protocol.If you properly have seen the picture above, you will see a black adapter.
The plate pot is for display contrast adjustment, and the jumper on the opposite side allows the back light is controlled by the program or remain off for power saving.By default the module is configured with the address 0x27 , but you can change this address using the pins A0, A1 and A2 Jumper settings. Simple LCD Timer With Arduino UNO. This is usually used to communicate between one master and multiple slaves. Use the I2C bus adapter for the LCD display and connect using I2C. The module has 16 pins that can be directly connected to the display, or you can test the connection in breadboard, as I did riding the circuit below where I used a 16×2 LCD display with HD44780 controller connected to the Arduino Uno: If you are using an Arduino Mega 2560, use the pin 20 (SDA) and 21 (SCL) :The commands for display control are almost the same library   Upload Library using menu Sketch >> Include Library >> Add .ZIP File// set the LCD address to 0x27 for a 16 chars and 2 line display// See http://playground.arduino.cc/Main/I2cScanner

(Error message: No such file or directory)All problems fixed, check the updated version in the same page.Thank you the codes are now working but i wonder why the LCD are displaying unwanted charactersArduino: 1.8.8 (Mac OS X), Board: “Arduino/Genuino Uno”/var/folders/zh/cspl3ptx5p33k6b2qn8ly6w80000gp/T/arduino_modified_sketch_73471/sketch_feb08a.ino: In function ‘void setup()’:Try changing the lcd.begin() to lcd.begin(16,2) to initialize the display.I copied all of the code you have provided into a sketch when I click on the Verify buttonyou need to install the library, the link to library is given in article.Enter your email address to subscribe to this blog and receive notifications of new posts by email. another way is to use With this module, you can control an LCD display, either 16×2 or 20×4, using only two pins Arduino: the analog input In the module left side we have 4 pins, and two are for power ( Vcc and GND ), and the other two are the interface I2C ( SDA and SCL ) .


If you use normal LCD display, you need a total number of connections are 12. another way is to use 74HC595 Shift register for interfacing.

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