iic i2c interface 2004 lcd module display price

A 20×4 dot matrix Character LCD Module display in STN Negative Blue LCD Mode, Six O’clock viewing direction, Wide Temperature Range (Operating Temp: -20°C to 70°C, Storage Temp: -30°C to 80°C), and White LED Backlight. It has a transmissive polarizer suitable for darker environment. This product is assembled Chip On board with 1/16 Duty and a Controller IC AC780S or equivalent. The interface type is Serial – I2C or IIC. This is an ROHS Compliant product manufactured with ISO standards and procedures.

If you want to add some visual output to your Arduino projects, you’ll need a display. If you need only little to display, the 20X4 LCD2004 Display with I2C Interface Module is a quite good solution.

This is 20x4 LCD Display that provides a simple and cost-effective solution that is very easy to interface with Arduino or Other Microcontrollers.. The display is 20 character by 4 line display has a very clear and high contrast white text upon a blue background/backlight. This is a great blue backlight LCD display. It is fantastic for Arduino based project.

This display overcomes the drawback of 20x4 LCD Display in which you’ll waste about 8 Pins on your Arduino for the display to get working. Luckily in this product, an I2C adapter is directly soldered right onto the pins of the display. So all you need to connect are the I2C pins, which shows a good library and little of coding.

The I2C is a type of serial bus 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.

These modules are currently supplied with a default I2C address of either 0x27 or 0x3F. To determine which version you have check the black I2C adaptor board on the underside of the module. If there a 3 sets of pads labelled A0, A1, & A2 then the default address will be 0x3F. If there are no pads the default address will be 0x27.

In this article I am going to interface a 16x2 I2C LCD with Arduino Uno. In my previous article is discuss aboutinterfacing of 16x2 LCD with Arduino Uno. The difference is in number of wires. There we need more than 12 wires. But here only use just 4 wires. How ?!!!!!! Before I use parallel communication method for interfacing LCD with Arduino. But now I am using I2C Communication.

Here I use the same 16X2 LCD in my previous article. But additionally attach a I2C Module to the 16x2 LCD. It work as an inter mediator between the LCD and MCU (here Arduino).

I2C is short for Inter-IC. And it is a type of BUS. This is designed by Philips semiconductors. I2C is a synchronous, multi slave, multi master packet switched, single-ended serial bus. ie. multiple chips can be connect to the same bus.I2C uses only two bidirectional open collector or 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. For more about I2C protocol clickhere.

It is also known as I2C Module. It has total of 20 male pins. 16 pins are faced to rear side and 4 pins faced towards front side. The 16 pins for connect to 16x2 LCD and the 2 pins out of 4 pins are SDA and SCL. SDA is the serial data pin and SCL is the clock pin. The rest 2 pins for power supply (Vcc and ground).There is a POT on the I2C Module. We can control the contrast of the LCD display by rotating this POT. And there is a jumber fixed on the module. When we remove the jumber, the backlight of the LCD display will go OFF.

Before starting we need to know about addressing of I2C devices. Every device which can attached to MCU have an address. We need to know this address for communicate with that particular device.

You can see three solder pads on the I2C module. which is labeled as A0, A1 and A2. This is Address selectors. ie, each solder pads have one upper potion and a one lower potion. if, there is a connection between upper potion with lower connection it is called "Connected" otherwise it is called "Not connected". When A0, A1, A2 are in "Not Connected" condition ( A0 = 0, A1 = 0, A2 = 0) the address would be 0x27. In default the A0, A1, A2 are in "Not connected" condition. And some time default address is 0x3F. There is no need to change the address of the I2C module when we use only one LCD. But when we use more than one LCD, need to change the address. Because two or more different device can"t communicate with the same address. For more address see the table given below.

In some cases A0, A1, A2 are "Not connected" state, but the address is not 0x27. We can"t communicate with this address. So we need to find the original address of that device. For that we need to run the Arduino with "I2C Scanner" code.

I2C Scanner code is used for find the number of I2C devices and address of I2C devices. First add the header file for include "Wire.h" library. Then in setup part, begin the "Wire" library by "Wire.begin()". Then begin the serial monitor as the baud rate of 9600 by "Serial.begin()". Next in loop part, define two variables with the datatype "byte" named "error" and "address". Then define another variable with the "Integer ( int)" datatype named as "Devices". And set initial value as 0. Next start a for loop with minimum value of 1 and maximum of 127. "address" used as loop variable. Next input the address to wire with the function "Wire.beginTransmission()". The i2c_scanner uses the return value of the "Write.endTransmisstion()" to see if a device did acknowledge to the address. This return value store the value to the variable "error". The return value become 0, if a device acknowledge to the address. Otherwise, the return value become 4. Next use a if. And the condition is "error==0". Then print the particular address to the serial monitor only if the address<16. Here we print the address in Hexadecimal. The printing instruction is "Serial.print(address, HEX)". And count the Device.The complete I2C Scanner code is given below#include

Next open Serial monitor from the icon on top right corner of Arduino IDE. And set the baud rate as 9600. Please ensure the correct port. Then you can see the address of LCD in serial monitor like shown below

Before that need to add a library to Arduino IDE. Go to thelinkand download the library Arduino-LiquidCrystal-I2C-library. Then open Arduino IDE and go toSketch>Include Library> Add.ZIP Library. Next select the downloaded ZIP file and clickopen.

Next create a sketch. First I include the header "Wire.h". This library help to communicate with I2C device. Then include "LiquidCrystal_I2C.h" for better communication with display.#include

Next set the address, number of column and number of rows using the function "LiquidCrystal_I2C lcd(). The address is 0x27 (discovered using the I2C Scanner Code). Number of columns is 16 and number of rows is 2. After this, we can call the display using "lcd". You can also use multiple I2C LCDs with Arduino Uno. But set different addresses and variable for each display.LiquidCrystal_I2C lcd(0x27, 16, 2);

Now the LCD is ready to print. The cursor is at 4th column(count from 0), and 0th row(count from 0). Then print the Message "Hackster" by the function "lcd.print()".lcd.print("Hackster");

The programming is completed. Upload the sketch to Arduino and see the message on LCD.The complete code is given in the Code section of this article.Please don"t copy-paste my code. Try to understand the code line by line and create your own sketch.

Description:The IIC 2004 LCD display module is a 4 line 20 character LCD module not only set the contrast control knob selector switch also has a backlight and IIC communication interface. For beginners, not for the cumbersome and complex LCD driver circuit connection and a headache, the real significance of this LCD module will simplify the circuit, this module directly into the Sensor Shield V5.0 sensor expansion board IIC device interface can, GM 4P sensor connection cable, programmed through the controller, you can easily identify the slogan, sensor data records.Specification:Supply voltage: 5VInterface: I2CI2C address: 0x27 or 0x3FPin definition: GND, VCC, SDA, SCLContrast adjust: potentiometerThe module is a low-power consumption character LCD module with a built-in controllerThe module can be easily interfaced with a MCUDisplay format: 20 Characters x 4 linesFully assembled and tested serial LCD 20 x 4 moduleWhite text, blue backlightIt is fantastic for based projectSize: 9.8 x 6 x 1.2mmPackage included:3 x 2004 LCD display module