lcd module 20x4 i2c brands

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, LCD2004 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. I2C bus has only two bidirectional signal lines, Serial Data Line (SDA) and Serial Clock Line (SCL). The blue potentiometer on the I2C LCD2004 is used to adjust backlight to make it easier to display on the I2C LCD2004.

I²C (Inter-Integrated Circuit), pronounced I-squared-C, is a multi-master, multi-slave, single-ended, serial computer bus invented by Philips Semiconductor (now NXP Semiconductors). It is typically used for attaching lower-speed peripheral ICs to processors and microcontrollers. Alternatively I²C is spelled I2C (pronounced I-two-C) or IIC (pronounced I-I-C).

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 I²C (Inter-Integrated Circuit), pronounced I-squared-C, is a multi-master, multi-slave, single-ended, serial computer bus invented by Philips Semiconductor (now NXP Semiconductors). It is typically used for attaching lower-speed peripheral ICs to processors and microcontrollers. Alternatively I²C is spelled I2C (pronounced I-two-C) or IIC (pronounced I-I-C).

3) Find the file LiquidCrystal_I2C which you just download. Click it open and then you"ll be prompted by "Library added to your libraries. Check "Import libraries"”. You also can see the libraries just imported have appeared on the list by Sketch->Include Library->LiquidCrystal_I2C.

If everything is correct,But the display just shows 16 black rectangles on Line 1.it may be the address of i2c is not 0x27,therfore you need to run the following code to read the address,then modify the 0x27 to which you read.

Features：IIC/I2C interface was developed to reduce the IO port usage on Arduino board.* Old 1602 screen requires 7 IO ports but this module uses only two.* Much needed control panel IO ports can be used to add some sensors, SD card and so on.* A New High-Quality 4 Line 20 Character Lcd Module.* Potentiometer can be adjusted to control the contrast.* Back light can be turned off by removing the jumper on the back panel.Specification:* Interface: I2C* I2C Address: 0x27* Pin Definition : GND、VCC、SDA、SCL* Back lit (Yellow with Black char color)* Supply voltage: 5V* Size : 60mm×99mm* Contrast Adjust : Potentiometer* Backlight Adjust : Jumper

If your current LCD is frustrating you because it occupies all your GPIO pins and lacks characters" space, it is time to replace it with this one. This LCD Display Module uses an I2C communication interface, which only needs 2 wires to display information on any microcontroller-based project, including the Arduino. It is capable of displaying 4 lines of 20 white characters on a blue background. Moreover, it is compatible with either 3.3V or 5V logic systems, which is basically everything in programmable electronics.

Everyone loves character LCD, is cheap and works out of box! This is 20x4 character LCD module. But the need for 6 to 10 GPIOs is the pain :) It takes most of GPIO of Arduino and other microcontroller. Now with this I2C or Two wires interface LCD, you will save a lot of GPIO for your sensor and motor control.

LCD shield after connected with a certain sensors or SD card. However, with this I2C interface LCD module, you will be able to realize data display via only 2 wires. If you already has I2C devices in your project, you can still program this LCD with the correct I2C address. It is fantastic for Arduino based project.

This module realizes a fast I2C interface with the familiar LCD displays (16x02, 16x04 and 20x04), which makes the control of these displays much easier and more economical with I / O pins.

Because this module has 8 options for the address (0X20-0X27), it is possible to control 8 of these interface modules simultaneously with only 2 connections. By means of the built-in potentiometer on this module it is possible to adjust the backlight and contrast of the LCD.

I2C 2004 character LCD display module is 4 lines of 20 characters. It has backlight and IIC communication interface. For Arduino beginners, it will make complicated LCD driver circuit connection easy. It can be directly connected to the Arduino Sensor Shield IIC device interface or easily connected to the Arduino with its 4 pins.