How to use LCD LCD1602 with I2C module for Arduino - Robojax

[@DownhillAllTheWay]

Excellent tutorial. No BS, and the right amount of technical detail. And no music! Subscribed.

[@robojax]

Awesome, thank you!

[@yanfoo]

Three thumbs up for pointing out the address values for A0 A1 and A2! I couldn't get my LCD working until I saw that I was using the wrong address from the tutorial example. Cheers!!

[@paullarj8793]

This explanation on LCDs with Aduino is the best I have come across.

[@ImamHafizAkhlaqAhmad]

I was searching different tutorials to ascertain what code was being used to define pin placement and couldn't find anything with a credible explanation until I found your video. Thank you again for being a great teacher. Jizak Allah.

[@robojax]

I am glad you fund it useful. Shukan. Wa Eyakum.

[@StoneNicolas93]

thank you i am an arduino beginner and your videos always help me

[@rakshithrajpulluri3515]

Changing the address just by soldering... For this technique i searched a lot before seeing ur vedio....ur vedio helped me a lot ....tq

[@robojax]

You are welcome. Good to know. Please share and subscribe.

[@sionau]

Robojax, you are the best!

[@robojax]

So you are. thanks. There is the better video with wiring diagram kzbin.info/www/bejne/pqm4m3ipf7aKaK8 which is part of my Arduino course

[@SpeccyMan]

One absolute essential when soldering is to KEEP YOUR SOLDERING IRON TIP CLEAN TO ENABLE EFFECTIVE HEAT TRANSFER!!!

[@DodgyBrothersEngineering]

Thanks for pointing out the trim pot for the back display. I was about to send two displays back because I thought they were faulty, they were only turned down so nothing could be seen. Also the address map might come in handy too, thanks for sharing.

[@robojax]

You are welcome. I am glad you resolved the issue.

[@AvocadoAtrocity]

I love this channel so much. Thank you, Robojax

[@burstfireno1617]

3:37 A0 A1 A2... good but what are they used for? :)

[@robojax]

Your questions seems very baisc . You need to take a course. Please watch this video kzbin.info/www/bejne/jmmye52Dfq12qNksi=p0SVWoynWuSD16t2 this video is Larry of 30 lessons cours

[@xz6476]

TYSM Sir Code explained very well The best part is you also commented each statement May GBU 💖😘✌

[@robojax]

You are welcome. May GBU too.

[@slambergamer91]

honestly i watch a lot tutorial this is one of the best ! keep it up bro !

[@robojax]

Thanks, will do!

[@MegaKbyrne]

I did just that but I had problems with error code. I coppied and pasted your sketch and still error message. Iused library manager and found a library LiquidCrystalI12C and it now works. You have a different IDE version than mine also. Love your video's thou. Keep it up.

[@rustystrat50]

Hello. Thanks for the video. I used it on 8/28/22 and I had to make one small change, maybe the L C library has been updated and changed a bit. My Arduino IDE wouldn't accept "lcd.begin():" so I had to change it to "lcd.init();" Otherwise it works great. This is my first time trying to use an LCD.

[@rustystrat50]

I don't know if your interested in this but I found the "lcd.init();" in the Liquid Crystal I2C example "Serial Display".

[@robojax]

you have not installed the correct library. I made another tutorial with the same library here kzbin.info/www/bejne/hImkpKqFmMRlsMk and used lcd.begin() and it works fine. you are using wrong library.

[@Gaylynne1]

Great explanation. Thanks for your lesson. One question...can you control the backlight and/ or contrast of the I2C LCD using just the code?

[@yelkovany]

If lcd(0x27, 16, 2) configuration is not working, It is strongly recommended that you try the lcd(0x3f, 16, 2) configuration before giving up.

[@tonyverduga]

This solved my issue. I was sure it wouldn't, as it defies logic lol.

[@koshan12]

thank you

[@robdavidowitz6428]

Outstanding explanation 👌 Your videos must surely be of the best on the net👍

[@terrydsilva5061]

Well Done! Comprehensive tutorial on how to use this inexpensive device.

[@robojax]

Thank you. Good to hear that.

[@bmckayw]

Thanks for a great video! Very clear explanations and pleasantly helpful!

[@muhammadbilal2000]

Hello Sir, firstly thank you for the great video. Secondly, I would like to know that if it is possible to use RTC3231 which uses I2C, and the LCD1602 that uses the I2C too along with a keypad. For example, if I press a key on the keypad I would like to see it on the LCD. Will the two devices on the I2C bus make a problem?

[@robojax]

Just search my channel and you will be surprised. Here is the code and video kzbin.info/www/bejne/p3OTlaV_aputfac

[@muhammadbilal2000]

@@robojax Thank you very much, sir. I follow your channel regularly for the amazing stuff you have made. Actually, I have integrated the RTC and Keypad but now I want to integrate the I2C display. I wanted to know that will it possible to see the pressed key on the keypad on the display without any problem with the display or RTC? But you have discussed the address on the I2C bus. Do I need to specify the address of the LCD when I need to communicate with the display?

[@sampsmusik]

If u use the SDA and SCL pins instead (I have to since I'm also using something that takes the pins u used) do you have to change the code? Is there a line I missed where you declare which pins transfer clock and data?

[@robojax]

NO. That is what you should use. A4 and A5 are the same pins.

[@faroekjuthan89]

When I went to upload the code, I got an error on this point "lcd.begin()" .After this change it works great("lcd.begin(16,2)".Thanks for sharing and good luck with your projects.

[@Omsharmaji30]

how??

[@Ice-fl9et]

@@Omsharmaji30 explain what you don’t know how to do 🙄

[@EducationalTheatre]

Thankyou bro it really help me

[@droneforfun5384]

Can I connect "VCC" to the +/positive side of a 5V battery, and the GND to the -/negative side of the same battery? (I am going to connect some equipment to my Uno, and I've heard it is easy to burn the card if you try to take too much power from it)

[@robojax]

Yes you can if your battery is 5V. We don't have 5V battery as for as I know unless there is something else that regulates it to 5V.

[@droneforfun5384]

Robojax I was thinking about getting a 5v battery eliminator / power supply, instead of a battery. Not sure if it will work

[@anjello-fz8ko]

I always watch here. I just want to clarify how can easily code using lcd i2c in a different sensors thank you btw you have always nice content🥰

[@robojax]

I have used this display on may be over 50 or more sensors. just search my channel.

[@mateuszkrol8029]

Well done! Everything is clear and easy to recreate.

[@robojax]

Thank you.

[@chernoblyat1901]

7:48 I put the exact same code on the IDE and arranged the LCD like in the video but nothing happens on the LCD why is that?

[@robojax]

I assume you have downloaded the library. then adjust the contrast while the code is running. make sure you see 16 character frames in each line.

[@chernoblyat1901]

@@robojax yes, but how do we adjust the contrast without the potentiometer since like I'm using the LCD I2C

[@robojax]

It has to have potentiometer

[@johnberry5339]

Hello Robojax :)… I have just watched your tutorial and found it very informative. Thank you very much, John 👍😊

[@robojax]

Hell John, you are welcome. I am pleased you found it useful.

[@philipdsouza9521]

Hello John I found your tutorial very informative. I am doing a project for level controller.

[@philipdsouza9521]

I am doing a project on level controller. I have written the coding. The problem arises when the pump comes on or goes off. There is jumbled worlds. Should I send the coding to you?

[@ml_bowes]

Hi there, is it possible to use your code with arduino nano? I'm cannot find out how to get your code to work with a nano

[@robojax]

Hi, all the codes work with all Arduino board and that's why I did not mention which board.

[@kaparqru7718]

the shows error, I need help

[@robojax]

that is not enough. what error? it shows something. perhaps you have not installed the library. Please watch the better version of this video which is part of the course series with full details and wiring diagram here kzbin.info/www/bejne/pqm4m3ipf7aKaK8

[@DatjNguyen-w3u]

mine doens't work, is it because I haven't soldered the I2C module with the LCD? (wire connection and contrast is fine, I just keep getting a line of white boxes)

[@robojax]

how would you expect it without soldering. there won't be proper contact. solder it and it will work.

[@maahasakhia9243]

This was so helpful for my project, thank you!

[@kaptainkrunch3486]

Great video! Followed along and it worked perfectly. Thanks!

[@robojax]

You are welcome. Good to hear that.

[@nadermk7]

Hi thank you for great video. Mine is not working at all. I am using UNO with an OLED display, did everything A4 and 5, dedicated SDA and SCX, different libraries, even followed advice to change to lcd(0x3f, 16, 2), it is all dead and showing nothing. I am using an OLED without a shield but it has the four required connections. Any idea where am I going wrong?

[@robojax]

you gott install the library mention and shown. over 100,000 people have used this library

[@MaKaLoong]

Possible to explain the analog part? what if I wan other analog pin, rather than analog A05 / A04?

[@robojax]

SDA and SCL are used for I2C communications and ONLY those pings are using or just use the pins on other side of the board labeled as SDA and SCL. See this video which is part of my Arduino course that might help which has wiring diagram. kzbin.info/www/bejne/pqm4m3ipf7aKaK8 the full course is Here is $200 Arduino course for free Arduino Step by Step Course (over 100 video lectures) Starts here robojax.com/L/?id=338

[@nickthewinner2194]

The solution for the blue LCD problem is the potentiometer guys. That is the blue box behind your LCD. Screw the grey thing on it tighter and voila.. your there..

[@tonyverduga]

I solved my issue. It was the address. I was able to find the correct address using the scanner code. 0x3F is my address. I think this is what most people are experiencing, as the method in video is misleading about the addressing.

[@lgflanang]

Thanks Nick. That was all it took to display the characters.

[@hamoudaabidi8705]

thanks , i was about to smash the thing on the floor

[@Gig2Dave]

Thanks, been around, finally got it working

[@robojax]

You are welcome. I am glad you did.

[@fps3689]

@@robojax hey my lcd is just lighting up but no text :(

[@marcrobert2603]

@@fps3689 Same here

[@naveenprince8050]

Should we female header pin to solder??

[@MohammedAli-de7uw]

any pullup resistors required? bought 3 LCD with I2C. all three not displaying any text. the program downloaded without any error. brightness adjusted.

[@robojax]

did you set I2C address? use I2C scanner I've provided. then change the contrast. it should work. if you want to change I2C address, to something else, check the link in description for my other video.

[@MohammedAli-de7uw]

@@robojax I2C address correct. used scanner. its not able to find any device. It's stuck up like.. scanning......

[@robojax]

If it can’t find , then check wiring. SDA is A4, SCL is A5. And if you still can’t get the address, the your module is bad.

[@MohammedAli-de7uw]

@@robojax connection correct. Tried in another Arduino UNO. Now I2C address displays in scan, but still LCD not display letters. Adjusted contrast too. 🤪

[@MohammedAli-de7uw]

Finally done. Deleted all libraries and installed only one fresh. It's working. Cheers..

[@ernievirata2551]

It helps a lot.. You are so Great my friend :)

[@robojax]

I am glad it did. Thank you

[@MegaKbyrne]

I keep on getting a error message no liquidcrystal .h file exists. What a I doing wrong in down loading you code and folder?

[@robojax]

Just watch the video without skipping it will be resolved. Just install the library.

[@declanreel4537]

Can you please advice! I keep having a persistent issue with this part - lcd.begin(); This text consistently displays an error when trying to upload which states - 'no matching function for call to 'LiquidCrystal_I2C::begin()' What is the issue? Thanks

[@robojax]

Please download and include the library.

[@zeke432]

change lcd.begin(); to lcd.init();

[@wingsdesire1]

for those who are still searching I had exactly this error, >open the Arduino app; >click in sketch >add file then finally add the file here or search for the "Arduino" folder - Mac >command + space to search >type in "Arduino" without the " " >select the folder > Drag & drop the downloaded library into here or search for the "Arduino" folder - PC >windows + f to search >type in "Arduino" without the " " >select the folder > Drag & drop the downloaded library into here *** please correct me if I'm wrong and ill edit accordingly everything will now run as it should (I wish this was included in the tutorial for us noobs) on a side note here's more info on how to add libraries moving forwards; www.arduino.cc/en/Guide/Libraries if anyone is curious the file extension ending in .h is written in the c language and can be read with Xcode or visual studio

[@robojax]

you have not installed the correct library. I made another tutorial with the same library here kzbin.info/www/bejne/hImkpKqFmMRlsMk and used lcd.begin() and it works fine. you are using wrong library.

[@vithiyananthanesanmanuelje3772]

thank you sir great explanation sir from srilanka

[@edfx]

Mine didn't work on A5 and A4. Only works in SLC1 and SDA1. Also address is 0x3F instead of 0x27 for some reason.

[@robojax]

The manufacturers set in hardware. here my video if you want to set different address kzbin.info/www/bejne/mKKwfnyYor59iZI also A4 and A4 should work with Arduino UNO for others boards see the pins here www.arduino.cc/en/reference/wire

[@lukes9783]

Hello!! the second part of this comment saved me after messing with this thing for over an hour lol. thank you for sharing this fix :)

[@kimingseney]

did we need to solder at A0,A1 and A2 if we use address 0x27 ?

[@robojax]

Please see the link in the description for separate video which I2C module is fully explained

[@heisenburger5261]

Do you need to use the i2c bored or can you just use the lcd on its own

[@robojax]

No you don’t. Get the lcd without the I2C module and use. But you need to connect 8 or 10 wires instead of 4 . Here is my video on that kzbin.info/www/bejne/iWXckmaHbNqbgNU

[@clintjakealfante3101]

Thank you for the lcd library

[@jakagrabner9109]

Why didn't you use simple LiquidCrystal library? Does the driver change the way of using library or something?

[@robojax]

I tried many libraries and this was the best of all without any issue. In every video I made on LCD, I used it.

[@carlosmiguelgonzaleztolosa1775]

Questions: 1. how to customize the Pins for connecting SDA and SCL in the Arduino? I would like to use A5 and A4 for another purpose. 2. Will this library works for a 20x4 LCD display?? Thanks!

[@robojax]

1-See this video which I have explained the I2C address: kzbin.info/www/bejne/mKKwfnyYor59iZI 2-Yes I works. I have another video for LCD2004 display: kzbin.info/www/bejne/enzQf4Z5grV3oKc

[@1000yahya]

Very nice Tutorials

[@robojax]

Glad you like them!

[@oximas-oe9vf]

Please help I am getting, compilation error: no matching function for call to "Liquid Crystal_I2C::begin()"

[@oximas-oe9vf]

Okay I figured it out had to remove the other LCD libraries and restart the IDE

[@nafisashamimrafa4492]

Hello, I did everything as instructed in the video. However, my LCD lights up but doesn't show any text. It's totally blank. what can be the reason for that?

[@robojax]

Adjust the potentiometer until you see the text

[@kawaii7054]

@@robojax I had the same problem with her and when I adjusted th pot, only boxes shows

[@kawaii7054]

@@robojax pls help

[@sajigeorge4990]

How could I use this display for home theatre monitor?

[@robojax]

Search my channel for thermostat

[@NguyenPhuc-hn4yx]

hi i can't find the library so can you give me the link of it please

[@robojax]

Hi, 1000s of people have downloaded it. Under the video we have description and I have links there. see this image snipboard.io/EG4O2l.jpg

[@Mgiule]

Thank you a lot for your excellent video. You helped me to resolve a problem in a project I'm actually working. ( An emulator of an hydronic heating system ) Thanks again, I'm from Montreal. Miguel

[@robojax]

My pleasure. You may continue learning Arduino with my course . Link is in description

[@neelranade6322]

Make a video on i2c keypad interfacing with arduino please

[@robojax]

no seen or found keypad using i2C.

[@neelranade6322]

Please search on it on google

[@neelranade6322]

Please search on it on google

[@arjunkudikilla8839]

Can we do this without soldering

[@robojax]

Yes if you can hold the module with your hand pressed on the display

[@rajhookay]

Hi, I just followed the video to test my i2c with LCD on Arduino Uno. Though the LED lit up,, I could not adjust the contrast with the Variable, and hence nothing was visible in the LCD. can you suggest a remedy?

[@robojax]

That’s that only way.

[@obsidiantechz1371]

is it important to solder a0 a1 and a2 pin for 0x27 address

[@robojax]

Once you receive it, do not touch it. it will work. unless you want use another address.

[@chrisliddiard725]

If in doubt use the ic2 scanner sketch to find the address of the ic2 device you are using. Also as mentioned in the vid, a lot of the modern revision [r3] boards use SDA & SCL instead of pins A4 & A5. You'll find a lot of the older sketches showing pins connected to A4 & A5.

[@arsive02]

I'm not getting the output displayed. LCD is on, i also checked the I2C address and its 0x27 only. What should i do?

[@robojax]

use potentiometer to set it properly. Watch the video it should work.

[@RoyAntaw]

Thanks...Just what I needed to for 1602 LCD I2C Display module.

[@robojax]

You are welcome.

[@darryl1398]

I need help please. I have connected a MPU9250 accelerometer to the arduino at pin A4 and pin A5 already. Where can i connect the SCL and SDA of the LCD screen and how do i change the code?

[@robojax]

Hi, you are asking questions which have been all answered in the video. Please watch, have patience as for 15 minuets. I am reading this comment after 7 hours. if you had watched the video, you would have had the answer 6 hours and 45 minuets ago.

[@raymi9612]

My LCD won't display anything, the back-light LED is on, but I can't see any text on the screen. I checked the soldering and I didn't spot any problems with that process, and my code is also correct. Do you know what might be the problem? Thanks.

[@robojax]

Adjust using potentiometer. I have shown in video.

[@raymi9612]

@@robojax I tried, but that's not the problem

[@ayesuzzaman9891]

Thanks ......... it really helped

[@Chandhrayaan-4]

May i know What is SCL line Frequency here?

[@robojax]

The baseline is 100kHz but you can change it. here is the page where you can read further www.arduino.cc/en/Reference/WireSetClock

[@dikoricamora]

Hello sir, i followed everything on the video but it wont display the characters only blank lcd screen that is turned. Help!

[@robojax]

I assume you get the I2C address on serial monitor. if so then turn the potentiometer and adjust the contrast. if you don't set the I2C address correctly, you will not get value. good luck.

[@dikoricamora]

@@robojax okay sir thank you and btw it works!

[@robojax]

you are welcome.

[@dharanichavvakula4517]

Please help me , I am getting error. It showing an error occurred while uploading the sketch

[@robojax]

provide error to help you. most people think they are smart and skip the video and miss the instruction. I hope you are not amongst those.

[@obsidiantechz1371]

Just got the Lcd thing to work but I have a doubt. Suppose you want to change the text After re-uploading the code you have to either adjust the potentiometer in the i2c module or turn the Arduino On/Off to make the new text visible. Is there a simple solution to this?

[@robojax]

you can have push buttons like 2 3 or 8 push buttons each with different messages. once pushed you can display them. I have a lot of videos on push buttons. Watch them so you learn how push button works. then if you watched this video fully you would know how to display text. With each push button different text will be displayed. if time permits, I will make a video on that.

[@amardarwatkar8338]

Can Arduino be used to produce business goods? What is your opinion on this?

[@robojax]

Yes of course. There are so many companies offering industrial Arduino product.

[@amardarwatkar8338]

Thanks you sir for reply

[@oximas-oe9vf]

Please help Nothing is apearing on the LCD The back light is on but no words are showing up

[@robojax]

Turn the potentiometer to three left or right

[@toheedrabbani6865]

can i run a program after uploading it with arduino then removing arduino and using i2c instead

[@robojax]

This display is used in this video “for Arduino “ you can connect it to other microcontroller to display text if you know how to program it. Here is introduction 30 minutes course kzbin.info/www/bejne/g5PFY6uXZryWiK8

[@andrewsotnikov5680]

I found out information, into the datasheet to LCD 1602 is indicated, that backlight consumption is about 100 mA. As I know, DC current per I/O board's pin is 40 mA. So, using this LCD on maximum output current limit is harmful, is not it?

[@robojax]

I have not measured the current, but even if 100mA is the max current of the LCD, it will consume it from the VCC pin. The VCC pin of Arduino uno can supply up to 400mA and you can see it here: playground.arduino.cc/Main/ArduinoPinCurrentLimitations the 40mA is the limit of the IN/OUT pins which in this case we do not use to supply power. The other pins are use to communicate which needs very little current.

[@yashthadhawani1419]

Hey sir code is getting uploaded and backlight is also glowing but the text r not visible so please help!

[@robojax]

now turn the potentiometer left or right until you see squares on the screen. this video is outdated .there is better version withy wiring diagram here kzbin.info/www/bejne/pqm4m3ipf7aKaK8 which is part of the Arduino step by step course

[@real_pivot]

thanks man omg i finally found it man thanks

[@robojax]

Glad I could help

[@real_pivot]

@@robojax can you subscribe to this channel = kzbin.info/door/-z6vzILUoG3FVtW5mWl1ww

[@arrenesamson3448]

sir i installed the library but i am still getting lcd.begin(); error .. please help me..

[@robojax]

Please watch the latest new video which is part of the course kzbin.info/www/bejne/pqm4m3ipf7aKaK8

[@green_quadrix]

Thank you so much!!!!👍

[@ahmadhazim7053]

it said that no matching function for call to 'LiquidCrystal_12c::begin()'

[@ahmadhazim7053]

Arduino: 1.8.9 (Mac OS X), Board: "Arduino/Genuino Uno" /Users/xxxx/Documents/Arduino/sketch_aug26a/sketch_aug26a.ino: In function 'void setup()': sketch_aug26a:29:17: error: no matching function for call to 'LiquidCrystal_I2C::begin()' lcd.begin(); ^ In file included from /Users/xxxx/Documents/Arduino/sketch_aug26a/sketch_aug26a.ino:20:0: /Users/xxxx/Documents/Arduino/libraries/LiquidCrystal_I2C/LiquidCrystal_I2C.h:58:8: note: candidate: void LiquidCrystal_I2C::begin(uint8_t, uint8_t, uint8_t) void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS ); ^ /Users/xxxxx/Documents/Arduino/libraries/LiquidCrystal_I2C/LiquidCrystal_I2C.h:58:8: note: candidate expects 3 arguments, 0 provided Multiple libraries were found for "LiquidCrystal_I2C.h" Used: /Users/xxxx/Documents/Arduino/libraries/LiquidCrystal_I2C Not used: /Users/xxxx/Documents/Arduino/libraries/Arduino-LiquidCrystal-I2C-library-master exit status 1 no matching function for call to 'LiquidCrystal_I2C::begin()' This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences.

[@robojax]

Because you did not include the library. Watch again, download library and add it to your Arduino IDE (Arduino program)

[@Crackerjap61]

I ran into this problem as well. Use lcd.init(); instead of lcd.begin();

[@ahmadhazim7053]

Robojax can i run 8 display on single arduino?

[@dirt-23]

@@ahmadhazim7053 you can fix this by deleting the other LiquidCrystal libreries forum.arduino.cc/index.php?topic=581907.0

[@thierrybertho4801]

It didn't work for me with a regular LCD shield, but it worked with DFRobot LCD Keypad shield. Not sure why, nothing showed up on the screen

[@robojax]

Perhaps you have not installed the right library.

[@Aryan-dy4sr]

When I type lcd.backlight, the backlight doesnt become orange in color.Any solutions?

[@robojax]

You cant' change the color. Just turn ON or OFF

[@jrogeet]

do we really need to solder it?

[@robojax]

if it is not already soldered, yes you need. the connection will not be established.

[@Manan_rana]

sir actually i am not able to found the master library i have checked all the links there is liquid crystal and lcd 1602 download links do u can provide me the master library link

[@robojax]

It has been foliage over 100,000 times . Look at the link in the description

[@alexnikoo244]

Hey, I am new in this, I will shop same for Arduino but instruction says the I2C 0*24 is not possible to be changed , what is this and do I need to get another type? I will use the microcontroller with a encoder on a machine. Best

[@robojax]

sorry I did not understand the 0*24 in the "I2C 0*24". what are you referign to 0*24?

[@sameerk12982]

Thank you very much for this tutorial.

[@robojax]

You are welcome. If you watched with other than English subtitle, please let me know. Thanks

[@shkolatif7764]

when i installed the library it wasnt as yours, i did not get the DHC library. what should i do?

[@robojax]

You must get it from the link I provided.

[@tangstudiodotnet]

Very nice tutorial ! Thanks

[@robojax]

You are welcome!

[@alkemaatje]

Hi Robojax, thanks for the video but i still can't get my lcd to work. I soldered the I2C backpack on the 16x2 lcd, connected the pins right, checked the adress with the I2C scanner (result was 0x27), installed the right library, tried every angle of the potentiometer of the backpack, closed and opened arduino, resetted the UNO, reinstalled the library, summarized: I tried everything but the only thing my LCD gives is a very bright blue screen with no boxes, lines or anything on it. Just blue light. What could it be? I am trying this for days now. Hope you can help me. Thanks in advance.

[@alkemaatje]

Never mind. Took my time soldering it again and it worked. Probably didn't solder it right the fist time.

[@robojax]

good luck with your project.

[@MrDhilishkumar]

Your explanation is very good. Did you have project Arduino control pressure in compressor with wiring and Arduino code explanation. Please give the link. Your videos are very helpful. You should have long life.

[@hexure9663]

Ur channel is awesome.

[@robojax]

Thank you.

[@ajelzeng8415]

we are original manufactory for LCD display, if you need 1602A pls let me know. mail to [e-mail]

[@ndolomusau8414]

hello,am using this lcd in my project on an alarm clock,i have difficulties in the code settings and arduino setting.kindly help me out brother.am new in arduino projects.

[@robojax]

Hello, if you are new, then you need to start learning. Here is my $200 Arduino course for free kzbin.info/www/bejne/Y2fUhKV6iqZol5o and in this course we have a full section on LCD display. Good luck

[@gastondibble4827]

Hi, Your video is excellent!, But I downloaded library, I intalled, Connect all and LCD did´t work. I checked the Program,Libraries and circuit several times. The program ran without error, the LEDs on Arduino blicked, and LCD is on, but message had not show. Is very strange.! I saw other video about issue address 0x27 issue. Are there any way of check pins 4 and 5?, I check with a LED, and it pins have a behaivor of pulse of clock. I am using Arduino UNO and LCD 1602 Any idea? Best Regards

[@robojax]

Hi, turn the potentiometer. Most of the times it is the contrast that makes the text disappear. Did you run the I2C scanner? it is in the same page as the code. robojax.com/learn/arduino/?vid=robojax-LCD1602-I2C install i2C scanner, get the address and use it if the issue is with the I2C. Most people don't watch the video and kip. I have left nothing. it should work as it did for over 100k people.

[@FlightSim2703]

Well done RJ, I'm expecting soon in the mail a 20x4 LCD, just wondering if you will intend upload another wiring, instructions, and code links abut that popular LCD sometime soon? Regards

[@robojax]

there is 20X4 and I will upload the video in coming days. But have not heard 20x5.

[@FlightSim2703]

Oops ;) you have right, I mistyped the actual size is 20x4 exactly what you say is correct. Regards and thanks very much.

[@ishmummonjurnilock8950]

Hello. I have been facing problem of arduino automatically turning off after I am connecting VCC port of I2C LCD to the 5V port of arduino. How can I get rid off this problem?

[@robojax]

your display has wrong connection. it is the USB power that is shutting down because too much current is drawn from USB. find out where the problem is.

[@minecraftvideos3435]

Hello I are great but with the code it says error liquidCrystal_12c.h:no such file or directory can u help thanks

[@robojax]

Hello, it means you have skipped the video and have not followed the instructions. Please watch again without skipping and other 133,000 people it will work for you. Cheers.

[@guillaumetchekhov2144]

@@robojax Strange ... I got the message "lcd begin: no such ..." and finally after checking in the data about liquidcrystalllcd library, it had to be "lcd init". Which is not at all the same ! as well, in your sketch, you constantly write on line2 (0,1). You forget line 1 (1,0) ? So I have doubts indeed. I have seen the video all along and it never gives anything more.

[@robojax]

you have not installed the correct library. I made another tutorial with the same library here kzbin.info/www/bejne/hImkpKqFmMRlsMk and used lcd.begin() and it works fine. you are using wrong library.

[@nickthewinner2194]

I have a blue screen .. how do I solve this?

[@robojax]

you have got the i2c address issue. use the i2c scanner I have provided with the code. Watch mother video no I2C address if you still can't figure it out.

[@nickthewinner2194]

Your codes work... but screen is still blue which is weird

[@nickthewinner2194]

Solved it!

[@tonyverduga]

@@nickthewinner2194 What was your issue? I'm having white on top and blue on bottom.

[@nickthewinner2194]

@@tonyverduga Had a blue screen. Check out the back and look at the blue part. Then you have to get a driver and then screw the grey part tighter

[@Damian-sh8hu]

Code for handling LCD in Arduino IDE is the same as in example, but when the code is uploaded to Arduino, nothing displays on the LCD. Please help. I tried various versions of librares for i2c lcd and no one works. Thank you

[@robojax]

did you run the I2C scanner? Your issue is with I2C module. watch this video kzbin.info/www/bejne/mKKwfnyYor59iZI

[@Damian-sh8hu]

Thank you. Now everything works as expected.

[@0124akash]

lcd.init (); Error on this line how to solve this sir ?

[@robojax]

what error? provide full text. you must install library. Please watch better latest video here kzbin.info/www/bejne/pqm4m3ipf7aKaK8

[@0124akash]

@@robojax library already installed. lcd.init (); error

[@robojax]

you have not installed the correct library. I made another tutorial with the same library here kzbin.info/www/bejne/hImkpKqFmMRlsMk and used lcd.begin() and it works fine. you are using wrong library.

[@vaibhavkhatri3435]

Good Tutorial, Well explained :):):)

[@robojax]

Glad you liked it!

[@minecraftvideos3435]

Hello robojax I followed everything now it says no matching function for call to liquidCrystal_I2C::begin() can u help please and I am so sorry for keep bothering u

[@robojax]

Hello, yes it this itself say you did not follow. you have skipping the video. Please watch again without skipping. I have spent 6 to 8 hours to make this video and you can't even wait to watch it for 15 minuets. Please watch and I can assure you like 130,000 other people it will work for you as well.

[@ebrahimmomin7518]

I had subscribed to a bunch of people and I was trying not to subscribe to more people, but I had to subscribe

[@mubarakmgunga4223]

my lcd only light up...does not display anything help pls

[@robojax]

1-adjust the contrast 2-run I2C scanner and set proper address