lcd display arduino datasheet pricelist

ERM1601SYG-2 is 16 characters wide,1 row character lcd module,SPLC780C controller (Industry-standard HD44780 compatible controller),6800 4/8-bit parallel interface,single led backlight with yellow green color included can be dimmed easily with a resistor or PWM,stn-lcd positive,dark blue text on the yellow green color,wide operating temperature range,rohs compliant,built in character set supports English/Japanese text, see the SPLC780C datasheet for the full character set. It"s optional for pin header connection,5V or 3.3V power supply and I2C adapter board for arduino.

It"s easily controlled by MCU such as 8051,PIC,AVR,ARDUINO,ARM and Raspberry Pi.It can be used in any embedded systems,industrial device,security,medical and hand-held equipment.

Of course, we wouldn"t just leave you with a datasheet and a "good luck!".For 8051 microcontroller user,we prepared the detailed tutorial such as interfacing, demo code and Development Kit at the bottom of this page.

ERM2004SYG-2 is 20 characters wide,4 rows character lcd module,SPLC780C controller (Industry-standard HD44780 compatible controller),6800 4/8-bit parallel interface,single led backlight with yellow green color included can be dimmed easily with a resistor or PWM,stn-lcd positive,dark blue text on the yellow green color,wide operating temperature range,rohs compliant,built in character set supports English/Japanese text, see the SPLC780C datasheet for the full character set. It"s optional for pin header connection,5V or 3.3V power supply and I2C adapter board for arduino.

It"s easily controlled by MCU such as 8051,PIC,AVR,ARDUINO,ARM and Raspberry Pi.It can be used in any embedded systems,industrial device,security,medical and hand-held equipment.

Of course, we wouldn"t just leave you with a datasheet and a "good luck!".For 8051 microcontroller user,we prepared the detailed tutorial such as interfacing, demo code and Development Kit at the bottom of this page.

Answer: For the segment type LCD module, if you need to modify the outline size or display content, we will start the drawing paper for your checking.

Answer: Yes, we can. Please send us your drawing paper. If you don’t have, please tell us the information of the display and your demand. We will evaluate the cost and give you the price soon.

Answer: If we have stock for the standard displays, the leading time is one day after payment. If it is mass production for special ones, the leading time is about 15~30 days. If we finish earlier, we will send email to you in advance.

The LCDduino board enables users to create many applications/projects that require a 16×2 LCD display and Arduino. The board has the exact size of 16×2 LCD and can be installed on the backside of the LCD. This is a low-cost solution that has onboard Arduino + LCD so no extra Arduino Nano or Arduino board is required. The Arduino compatible hardware includes onboard programming and boot-loader connectors, Atmega328 microcontroller, and 16×2 LCD interface. Each Arduino I/O Pin including the VCC and GND is exposed to the connectors for easy connection with sensors and other devices. The board enables the easy interface of many devices and sensors. The operating power supply is 7 to 15V DC.

After the board assembly, the brand new Atmega328 microcontroller requires burning the bootloader before it can be programmed using Arduino IDE. Refer to the connection diagram and follow the links below to learn more about bootloader and Arduino IDE programming.

Arduino example code is provided below to test the project. This code will help you to convert this board into a 0 to 5V Voltmeter. Just connect the DC source at analog in A0 to measure the DC voltage.

Nokia manufactures a wide variety of cell phones and many of their cheaper phones contain simple LCD"s which may be used in microcontroller projects.  There is one particular LCD model that is used in a wide variety of their phones and is often referred to as simply a "Nokia LCD", or "Nokia 6100 LCD".  I used to use a Nokia 2600 phone and whenever I upgraded I took the Nokia apart to remove its LCD.  This LCD appears to be the same one that is sold as "Nokia 6100 LCD" and I was able to get it up and running with a bit of work using an AVR.

You will need some sort of breakout board in order to connect the display.  Sparkfun sells several (a standard breakout, an Arduino shield, an Olimex module, etc) as well as the bare surface-mount connector.  Since all of SparkFun"s boards include the LCD, I just bought the connector and made my own breakout board since I already had the LCD.

If you don"t have a breakout board, you need to first make some sort of connector for the LCD.  My first attempt was to solder thin magnet wire to each leg of the connector with a fine-tip soldering iron.  This took several tries but eventually I got it connected.  I then applied generous amounts of super glue to make sure it wouldn"t come apart and soldered on some thicker wires to connect to the microcontroller.

After you have a breakout board for the LCD connector, you must connect it to your circuit.  There are 10 pins on the connector, one is unused.  The LCD has four control signals (Clock, Data, Reset, Chip Select), two 3.3V inputs, two grounds, and a backlight input.  The LCD driver circuitry runs on 3.3V as do the control signals.  However, the backlight requires a higher voltage around 7V.  Using a 1K ohm resistor between the backlight power and a 12V power supply seems to work well, the voltage is around 6-6.5V which makes it bright enough to use.

Since the LCD protocol is 9-bit SPI, you cannot use the hardware SPI interface found on many microcontrollers (including the AVR series microcontrollers) as they often only support 8-bit mode.  This means that you will probably have to implement a software SPI output.  Electrically, this means you can connect the four control lines to any unused I/O pins on your microcontroller.  Your microcontroller must be running at 3.3V to connect the lines directly, otherwise add 10K ohm resistors on each line to limit the current going into the LCD.

The LCD has many functions that are available by sending commands over the SPI interface.  The important ones are explained here and will allow you to get your LCD up and running.  A full set of commands is listed in the PCF8833 datasheet here:

Before you can write to the LCD, it must be initialized.  First, the Reset line must be pulled low for around 100ms and then raised high again.  The Reset line must remain high during operation.  Then, a sequence of commands must be sent, in the following order:

Continuing with the protocol, once the LCD is initialized it is ready to draw.  Drawing works by first defining a region to draw and then streaming pixel data to fill that region.  It is confusing at first, but if done properly is more efficient than pixel-by-pixel drawing.  A region is simply a rectangular area on the screen.  We"ll say it begins at point (X1,Y1) and ends at point (X2, Y2).  Once defined, the LCD controller will fill in pixels from left to right starting at (X1, Y1).  When it reaches the edge of the region, it will jump to the next line [in my example, (X1, Y1+1) ].  It does this until it reaches (X2, Y2) at which it stops accepting data.  If you only want to draw one pixel, you simply set (X1, Y1) and (X2, Y2) to the pixel you want to draw.  This defines the region as a single pixel.  Any data sent after the first pixel"s worth of data is discarded.

To implement the 9-bit protocol using an AVR, I found a nice ASM function in the SparkFun example code.  I modified the code some to clean it up and adapt it for the Phillips controller.  This ASM code is more efficient than using regular C and allows faster LCD writes.

Rectangles are incredibly useful.  You can draw one big rectangle to clear the screen, use them for menu elements, indicators, check boxes, frames, text backgrounds, and much more.  Thankfully they are easy to draw on the Nokia LCD"s.  All you need to do is define a region the size of the rectangle and fill it in with a solid color.  The following AVR C code (using the functions described in the last section) will do this.

Although this is a graphical LCD, it is still useful to be able to print text to it.  Unlike character-based LCD"s, graphical LCD"s do not contain a character map or font table or anything.  To print text to a graphical LCD, you must define your own font table in your code and then print it character-by-character using the table.  In my code, I have provided a font table (one that I converted by hand because I couldn"t find a good program to do it for me).  The font is 6x8 which should allow you to fit plenty of text on the screen.  I have provided functions for printing characters as well as strings.

With rectangles and text down, we can begin making truly useful stuff.  Menus allow users to select from a large number of options with only a few buttons (Up, Down, and Select are common).  To make a menu that looks good, you need to format your screen and text properly.  I wanted a single title line and the rest to be menu entries.  The LCD is 130x130 (usable) pixels in resolution.  This means that I have 130 vertical pixels to divide up into menu lines.  Since my font is 8 pixels tall, I decided that using 10-pixel-tall menu lines would be good.  This gives a 1 pixel border around the text on top and bottom, 13 total menu lines (1 title + 12 entries), and up to 21 characters per menu line.

When drawing moving objects on the LCD, you can greatly speed up the frame rate and eliminate screen glitches by only redrawing the moving parts of an object rather than redrawing the entire screen or entire object.  For instance, if a ball is moving across the screen, rather than redrawing the entire ball you can just draw the pixels along the edge that has moved and clear the pixels on the edge that has moved away.  Techniques such as frame buffering and double buffering can be used, where a new frame buffer is compared against an old frame buffer and only differing pixels are written to the display.  However, given the limitations of AVR and similar 8-bit microcontrollers, these techniques are probably out of range.  If you are using an ARM or other 32-bit microcontroller with a higher performance CPU, more RAM, etc. then you can take advantage of double buffering for a much more efficient screen drawing system.

It is actually very easy to draw full color photos on the LCD!  I simply used the serial port to transfer the image from the PC to the AVR which displays it on the LCD.  To convert the image into the correct format, I wrote a small application in Visual Basic (VS 2010) that takes a 130x130 .bmp formatted image and transforms it into the 12 bit per pixel color format needed to display on the LCD.  The Visual Basic VS2010 project is included with the code package at the end of this Instructable.

I have posted example code for both AVR and 8051 microcontrollers as I have used the LCD with both.  The code was originally written for ATMega168 based on the SparkFun examples for both the LCD and Arduino LCD Shield.  I added text and menus then ported it to 8051 for use on my 8051 project board.  I then revised many systems which have been backported into the AVR code.

Thank you for this instructable. I"m an accomplished mechanic with custom fabrication for various component and systems for race cars. I"d like to tackle a screen / illumination project on an 02 GM Tahoe. Specifically the GM message center and prnd321 / odometer screen / display. All other regularly running interior / dash lights have been switched to blue led. I"m wondering how difficult it would be to change the colors of these 2 displays also to blue to match as best as possible to the blue led color. I have a spare dash cluster to use while this project is underway. Thanks in advance for any light :) you can shed on this

Have you had luck with your project? I am not familiar, but it appears the display in such vehicles is usually not an LCD of any kind, but a vacuum fluorescent discharge tube display, VFD. It"s a collection of thin shaped glass vacuum tubes that are coated with a Luminophore on the inside that determines their colour; correspondingly, while they can be manufactured in various colour, their colour can not be changed afterwards. I am not aware of any possibility to get a custom one-off VFD made for you.

It"s possible to reverse engineer the signals driving the display, and then create a drop in replacement, based on a microcontroller interpreting the signal and driving a graphic display of some kind, an LCD or OLED. With OLED, there is the question of suitability to vehicle use. The displays aren"t intended to run for hours on end, they degrade with use. Also their brightness is typically 10 times weaker than VFD. Also very few colours are available, you may be stuck with a colour that is more similar to that of VFD blue than your chosen LED blue. With LCD, there is an aesthetic issue with lowered contrast and potentially bad viewing angles. Monochromatic LCDs usually allow replacement of LEDs lighting them, and also LCDs with adjustable RGB backlight are available. An advantage of using a graphic display on a microcontroller is that you are not stuck with static symbols, you can adorn them with effect graphics, such as the frame of PRNDL gliding across the display or magnifying the currently active mode, beautiful, easily legible font for your odometer, etc.

I think the most promising course of action is getting an SMD LED display custom fabricated. You can likely drive them with simple electronics just to reduce the current and voltage from the original VFD signalling. While you can get numeric 7-segment LED indicators, you may need again signal re-encoding with programmable logic ICs or such, and there"s a possibility of colour mismatch. What i"m thinking of being most promising, is laser cutting a light barrier from black Delrin or acrylic. That can then do everything at once, both your PRNDL and your numbers. You can fill it with diffuser epoxy and set it on your custom designed LED board. You"ll need a manufacturing technique like that anyway for your custom elements, and if it"s automated, it won"t matter whether you"re doing a tiny element or a whole screen at once, and it won"t matter whether you"re cutting a handful of shapes into it or a hundred, and you get a uniform result.

Do you have a photograph of your display at hand so i know whether i"m thinking in the right direction? I am thinking of a display which has PRND321, a set of 7-segments for odometer, a couple of extra symbols around, but no text capability. If you have text dot matrix display which has distinct single-pixel spaces between the characters, it"s likely an HD44780 signal-compatible VFD, and you can get HD44780 LCD replacements. They come with width of 8, 16, 20 and 40 characters and height of 1, 2 and 4 lines.0

The "Message Center" appears to be an LCD it illuminates 2 colors, orange for some advisements, red for others i.e. low battery. I would like to change the color to blue or maybe green when it lights up as part of normal starting and vehicle going thru its checks. Any thoughts you have on this would be greatly appreciated.

The other project revolves around installing an aftermarket car stereo. It has (1) auxiliary 3.5mm input audio source option on the back. I have more than 1 aux audio source I would like to use. The stereo also has an audio video 3.5mm jack. (4 contact points vs 3 on the stereo aux input. I"ve pinned out the correct wires and can use the audio video source for audio only and the audio plays just fine when I select audio video input from the source selector on the front of the radio... However the screen displays "No Signal" even though the audio source plays thru it just fine. I realize this is because it is receiving no video signal. What I am wondering is if there is a manner in which I could provide a static image of my choosing or creation to put on a thumb drive or other media, power it and feed it to the video side of the audio video input. So that when I select audio video input it will not display "No Signal" and would display an image while utilizing the other audio source to play music from. Thank you if you have any insight into this area.

Message center is a monochrome graphics LCD. You shall probably find some SMD LEDs on the board beneath it, that can be replaced. I am not familiar with specific display model employed, nor are there any data sheets - it has apparently been manufactured by Optrex Corporation, Japan, specifically for use by a division of General Motors, and has not been available generally or used anywhere else. Most companies wouldn"t be caught dead ordering or a 45x28 LCD. For reference, the display model designation is DMF-50796H. If it"s anything like i imagine it to be, there should be a metal shield retained by twisted tabs on a PCB, and merely removing the shield should give you access to the LEDs.

An interesting hack, with possibility of grand destruction, is inverting the LCD. On top of the glass is usually a polarization film that can be peeled off and replaced with one mounted 90° off-angle. Tough luck if the filter is instead sandwiched between glass layers.

The simplest is probably taking the logic board from an old digital photo frame. This seems like the ideal use case for these devices, as they are really intended to cycle between images in their intermal or external storage. Ones manufactured before 2006-ish often have a composite display inside of them, and correspondingly also have an AV-out socket with the same signal. Sometimes, same trick can be applied to portable DVD players from that early era, if they have a USB or SD card socket, and you can remove the drive. Newer devices always drive the display digitally, but if there"s an AV-out socket, you can still use them, but they can be extremely rare, it seems they died out 5 years ago. Challenge will be finding a device with AV-out, and one that doesn"t have an annoying splash screen and goes straight to picture viewing.

The cheapest possible hardware is Raspberry Pi Zero, although the availability is TERRIBLE. It has composite AV out on an unsoldered header pin. Challenge will be developing a custom operating system which boots in a fraction of a second and then just sits there displaying an image, by stripping away everything possible and rewriting the boot system. This kind of software job is actually right up my alley. Maybe they"re losing money on it, i don"t know, something like $10-$15 would seem like a more reasonable price than the $5 they officially offer it for, but even a full Pi isn"t all too expensive. As to Pi alternatives, there"s C.H.I.P. which is "$9" but so far vapourware, and Orange Pi which is like $25 and actually available, but as these are based on basically undocumented Chinese ICs, it might be difficult to cut the software down. It might seem cruel to chop down a fully featured computer as a single picture generator, but can"t argue with the prices. All kinds of nominally simpler devices that i considered reprogramming for the purpose would end up being similarly or more expensive anyway, and much more effort.

Dear friends,i have nokia 2600c2 and nokia 2700c mobile. I need lcd datasheet used in these mobile. Do any budy have any idea where can i find it. I tried google but no use.2

Hello, I found out that which I was using was not a PCF8833 driven display but a ST7628. I wonder if the connector pinout is the same in both display types.

I read that it can be easily controlled via any 3 wire interface (which I am planning to software implement with a sort of loop till get a kind of 9-bit serial with enable/disable) in the datasheet, but as it"s the driver datasheet it only shows the whole driver IC pinout instead of the 10 pin nokia LCD connector. I don"t know how to connect it, I am afraid of damaging it. The display is currently working (with the phone) so if I could connect it, then it should work or show anything more than a black background.

i am doing a project on high speed photography controller. in which i have to interface nokia 6100 lcd with the ATMEGA 32 IC for setting parameters. i have the nokia 6100 LCD, but have few questions

I posted the pinout as well as the commands. The circuit is described above as well, it"s pretty simple if you take the time to look at the documentation of the LCD and read through the code. Note that Instructables is not in any way a professional help organization for your immediate needs, and no, I will not contact you in dire emergency because you didn"t read the code or pinout all the way through, because you would"ve learned all 3 of those things by doing so. Plus, no two setups are exactly the same, you can"t expect me to spit out your particular circuit...you have to do some of the work yourself!0

Hi, i"m using a arduino mega and can"t use this. The pins that was used on arduino was pwm 5-6-7-8 (data ,clock, chip select, reset). It "s right?More CommentsPost Comment

The display controller, UC1611, is no longer available in the form of bonding on the PCB which is how Crystalfontz has used it for this design. We are designing a drop-in replacement that uses the UC1611 heat seal package, which will continue to be supported, instead of the PCB bonding package.

The firmware has been updated with new features including Live Display, analog to digital interpretation on GPIO5 and GPIO6, closed loop temperature control. The new datasheets will have more information on these changes.

Fixed an issue with the USB data handling, primarily affecting the command 40 (0x28) subcommand 2 “Send Image Data to Display from Host.” Other USB data throughput improvements were also made.

As part of our continuous improvement process, CFA635 KS, CFA735 KT, and CFA835 display modules with the ATX (power on / off / reset) functionality enabled will have their RS-232 SERIAL cable bundle options changed from a serial cable and WRPWRY24 to a serial cable and a WRPWRY25. With TX (power on / off / reset) functionality enabled, additional

The WRPWRY24 is a power only cable and suitable for powering the CFA635, CFA735, and CFA835 when properly configured. When the displays are configured for ATX (power on / off / reset) functionality additional connections are necessary for proper operation. The WRPWRY25 offers the additional connections.

ERM1601SYG-2 is 16 characters wide,1 row character lcd module,SPLC780C controller (Industry-standard HD44780 compatible controller),6800 4/8-bit parallel interface,single led backlight with yellow green color included can be dimmed easily with a resistor or PWM,stn-lcd positive,dark blue text on the yellow green color,wide operating temperature range,rohs compliant,built in character set supports English/Japanese text, see the SPLC780C datasheet for the full character set. It"s optional for pin header connection,5V or 3.3V power supply and I2C adapter board for arduino.

It"s easily controlled by MCU such as 8051,PIC,AVR,ARDUINO,ARM and Raspberry Pi.It can be used in any embedded systems,industrial device,security,medical and hand-held equipment.

Of course, we wouldn"t just leave you with a datasheet and a "good luck!".For 8051 microcontroller user,we prepared the detailed tutorial such as interfacing, demo code and Development Kit at the bottom of this page.

16×2 LCD is named so because; it has 16 Columns and 2 Rows. There are a lot of combinations available like, 8×1, 8×2, 10×2, 16×1, etc. But the most used one is the 16*2 LCD, hence we are using it here.

All the above mentioned LCD display will have 16 Pins and the programming approach is also the same and hence the choice is left to you. Below is the Pinout and Pin Description of 16x2 LCD Module:

These black circles consist of an interface IC and its associated components to help us use this LCD with the MCU. Because our LCD is a 16*2 Dot matrix LCD and so it will have (16*2=32) 32 characters in total and each character will be made of 5*8 Pixel Dots.  A Single character with all its Pixels enabled is shown in the below picture.

So Now, we know that each character has (5*8=40) 40 Pixels and for 32 Characters we will have (32*40) 1280 Pixels. Further, the LCD should also be instructed about the Position of the Pixels.

It will be a hectic task to handle everything with the help of MCU, hence an Interface IC like HD44780 is used, which is mounted on LCD Module itself. The function of this IC is to get the Commands and Data from the MCU and process them to display meaningful information onto our LCD Screen.

The LCD can work in two different modes, namely the 4-bit mode and the 8-bit mode. In 4 bit mode we send the data nibble by nibble, first upper nibble and then lower nibble. For those of you who don’t know what a nibble is: a nibble is a group of four bits, so the lower four bits (D0-D3) of a byte form the lower nibble while the upper four bits (D4-D7) of a byte form the higher nibble. This enables us to send 8 bit data.

As said, the LCD itself consists of an Interface IC. The MCU can either read or write to this interface IC. Most of the times we will be just writing to the IC, since reading will make it more complex and such scenarios are very rare. Information like position of cursor, status completion interrupts etc. can be read if required, but it is out of the scope of this tutorial.

The Interface IC present in most of the LCD is HD44780U,in order to program our LCD we should learn the complete datasheet of the IC. The datasheet is given here.

There are some preset commands instructions in LCD, which we need to send to LCD through some microcontroller. Some important command instructions are given below:

Arduino LCD Display Modules are mostly used in embedded projects, because of its affordability and availability. The 16×2 Display LCD Module represents 16 Columns and 2 Rows. There are so many other combinations like 8×1, 8×2, 10×2, 16×1 and so on. However, 16 x 2 display LCD is most commonly used.

Arduino 16×2 LCD Display Module has 16 characters by a 2-line LCD display screen with an I2C interface. It displays 2 lines of 16 characters, white characters are displayed on a blue background.

This I2C 16×2 Arduino LCD Display Module uses the I2C communication interface. This means that we can use 4 pins for the display that is: VCC, GND, SDA, SCL. Thus, it gives us the advantage of saving 4 digital / analog pins on Arduino.

If you’ve ever tried to connect an LCD display to an Arduino, you might have noticed that it consumes a lot of pins on the Arduino. Even in 4-bit mode, the Arduino still requires a total of seven connections – which is half of the Arduino’s available digital I/O pins.

The solution is to use an I2C LCD display. It consumes only two I/O pins that are not even part of the set of digital I/O pins and can be shared with other I2C devices as well.

True to their name, these LCDs are ideal for displaying only text/characters. A 16×2 character LCD, for example, has an LED backlight and can display 32 ASCII characters in two rows of 16 characters each.

If you look closely you can see tiny rectangles for each character on the display and the pixels that make up a character. Each of these rectangles is a grid of 5×8 pixels.

At the heart of the adapter is an 8-bit I/O expander chip – PCF8574. This chip converts the I2C data from an Arduino into the parallel data required for an LCD display.

If you are using multiple devices on the same I2C bus, you may need to set a different I2C address for the LCD adapter so that it does not conflict with another I2C device.

An important point here is that several companies manufacture the same PCF8574 chip, Texas Instruments and NXP Semiconductors, to name a few. And the I2C address of your LCD depends on the chip manufacturer.

According to the Texas Instruments’ datasheet, the three address selection bits (A0, A1 and A2) are placed at the end of the 7-bit I2C address register.

According to the NXP Semiconductors’ datasheet, the three address selection bits (A0, A1 and A2) are also placed at the end of the 7-bit I2C address register. But the other bits in the address register are different.

So your LCD probably has a default I2C address 0x27Hex or 0x3FHex. However it is recommended that you find out the actual I2C address of the LCD before using it.

Connecting an I2C LCD is much easier than connecting a standard LCD. You only need to connect 4 pins instead of 12. Start by connecting the VCC pin to the 5V output on the Arduino and GND to ground.

Now we are left with the pins which are used for I2C communication. Note that each Arduino board has different I2C pins that must be connected accordingly. On Arduino boards with the R3 layout, the SDA (data line) and SCL (clock line) are on the pin headers close to the AREF pin. They are also known as A5 (SCL) and A4 (SDA).

After wiring up the LCD you’ll need to adjust the contrast of the display. On the I2C module you will find a potentiometer that you can rotate with a small screwdriver.

Plug in the Arduino’s USB connector to power the LCD. You will see the backlight lit up. Now as you turn the knob on the potentiometer, you will start to see the first row of rectangles. If that happens, Congratulations! Your LCD is working fine.

To drive an I2C LCD you must first install a library called LiquidCrystal_I2C. This library is an enhanced version of the LiquidCrystal library that comes with your Arduino IDE.

The I2C address of your LCD depends on the manufacturer, as mentioned earlier. If your LCD has a Texas Instruments’ PCF8574 chip, its default I2C address is 0x27Hex. If your LCD has NXP Semiconductors’ PCF8574 chip, its default I2C address is 0x3FHex.

So your LCD probably has I2C address 0x27Hex or 0x3FHex. However it is recommended that you find out the actual I2C address of the LCD before using it. Luckily there’s an easy way to do this, thanks to the Nick Gammon.

But, before you proceed to upload the sketch, you need to make a small change to make it work for you. You must pass the I2C address of your LCD and the dimensions of the display to the constructor of the LiquidCrystal_I2C class. If you are using a 16×2 character LCD, pass the 16 and 2; If you’re using a 20×4 LCD, pass 20 and 4. You got the point!

First of all an object of LiquidCrystal_I2C class is created. This object takes three parameters LiquidCrystal_I2C(address, columns, rows). This is where you need to enter the address you found earlier, and the dimensions of the display.

In ‘setup’ we call three functions. The first function is init(). It initializes the LCD object. The second function is clear(). This clears the LCD screen and moves the cursor to the top left corner. And third, the backlight() function turns on the LCD backlight.

After that we set the cursor position to the third column of the first row by calling the function lcd.setCursor(2, 0). The cursor position specifies the location where you want the new text to be displayed on the LCD. The upper left corner is assumed to be col=0, row=0.

There are some useful functions you can use with LiquidCrystal_I2C objects. Some of them are listed below:lcd.home() function is used to position the cursor in the upper-left of the LCD without clearing the display.

lcd.scrollDisplayRight() function scrolls the contents of the display one space to the right. If you want the text to scroll continuously, you have to use this function inside a for loop.

lcd.scrollDisplayLeft() function scrolls the contents of the display one space to the left. Similar to above function, use this inside a for loop for continuous scrolling.

If you find the characters on the display dull and boring, you can create your own custom characters (glyphs) and symbols for your LCD. They are extremely useful when you want to display a character that is not part of the standard ASCII character set.

CGROM is used to store all permanent fonts that are displayed using their ASCII codes. For example, if we send 0x41 to the LCD, the letter ‘A’ will be printed on the display.

CGRAM is another memory used to store user defined characters. This RAM is limited to 64 bytes. For a 5×8 pixel based LCD, only 8 user-defined characters can be stored in CGRAM. And for 5×10 pixel based LCD only 4 user-defined characters can be stored.