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.
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!!
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.
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.
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.
you have not installed the correct library. I made another tutorial with the same library here ua-cam.com/video/NXAswOc_2zg/v-deo.html and used lcd.begin() and it works fine. you are using wrong library.
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.
Your questions seems very baisc . You need to take a course. Please watch this video ua-cam.com/video/X8OJjMIHCrw/v-deo.htmlsi=p0SVWoynWuSD16t2 this video is Larry of 30 lessons cours
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?
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.
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
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 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?
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
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..
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.
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?
The manufacturers set in hardware. here my video if you want to set different address ua-cam.com/video/bqMMIbmYJS0/v-deo.html also A4 and A4 should work with Arduino UNO for others boards see the pins here www.arduino.cc/en/reference/wire
you are welcome. Few weeks back I published my Arduino course worth $200 on Udemy. Arduino Step by Step Course (over 100 lectures) Starts here robojax.com/L/?id=338
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!
1-See this video which I have explained the I2C address: ua-cam.com/video/bqMMIbmYJS0/v-deo.html 2-Yes I works. I have another video for LCD2004 display: ua-cam.com/video/DKmNSCMPDjE/v-deo.html
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. ua-cam.com/video/pxUjEsJQW2M/v-deo.html 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
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?
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.
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.
The close up photography is good but I stopped after 4 minutes as its unclear what is meant by A0, A1, A2 is not soldered this point can be soldered together. "This point" is singular while "together" is plural. Do you mean "These points" are to be connected to each other by soldering? The photo does not show them connected to each other. Is one to solder all 3 points together (A0 to A1, to A2)? "This point can b soldered together " is similar to saying "one of the legs are both the same". Respectfully the value of this video could be improved with some clarity on what to solder regarding A0, A1, & A2 .
that topic was out of focus of this tutorial. Explaining I2C address would have made the video very long. you may watch it her ua-cam.com/video/bqMMIbmYJS0/v-deo.html
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 ua-cam.com/video/pxUjEsJQW2M/v-deo.html
how and when the LED is turned ON? once you turn it on just add this lcd.print("RED LED ON"); to where the LED is turned ON. If you further help, please share your LED code here codeshare.io/ and once you posted your code, this website will create automatically the URL (address)for your code. Then copy and paste the URL here and I will look at it to help you.
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?
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?
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.
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.
@@robojax not sure. I used the standard libraries for uno. Anyhow just thought I would share my experience incase someone else gets stuck like I did. Thanks for you videos.
you have not installed the correct library. I made another tutorial with the same library here ua-cam.com/video/NXAswOc_2zg/v-deo.html and used lcd.begin() and it works fine. you are using wrong library.
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?
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?
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 ua-cam.com/video/S4ya3Q7uhJs/v-deo.html
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
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.
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
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
you have not installed the correct library. I made another tutorial with the same library here ua-cam.com/video/NXAswOc_2zg/v-deo.html and used lcd.begin() and it works fine. you are using wrong library.
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.
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 ua-cam.com/video/pxUjEsJQW2M/v-deo.html which is part of the Arduino step by step course
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?
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.
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?
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.
Hello sir, I know it has been 3 years. But can you help me with my problem? The error code is -no matching function for call to 'LiquidCrystal_I2C: :begin(int, int)' I'm looking forward for your reply. I would like to show you the full error code if possible though.
Hello, you are watching very old video. here is the better video with wiring diagram ua-cam.com/video/pxUjEsJQW2M/v-deo.html your error says that you did not watch the video. You have not installed the library.
This is Raju I have tried out more on my project by following your procedure but it is not working Please solve my below problem. SerialDisplay:13:12: error: no matching function for call to 'LiquidCrystal_I2C::begin()' lcd.begin(); Thanks for your answer
you have not installed the correct library. I made another tutorial with the same library here ua-cam.com/video/NXAswOc_2zg/v-deo.html and used lcd.begin() and it works fine. you are using wrong library.
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 ua-cam.com/video/Mbb2xa1WcRM/v-deo.html
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)
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.
Excellent tutorial. No BS, and the right amount of technical detail. And no music! Subscribed.
Awesome, thank you!
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.
I am glad you fund it useful. Shukan. Wa Eyakum.
This explanation on LCDs with Aduino is the best I have come across.
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!!
thank you i am an arduino beginner and your videos always help me
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.
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.
You are welcome. I am glad you resolved the issue.
Changing the address just by soldering... For this technique i searched a lot before seeing ur vedio....ur vedio helped me a lot ....tq
You are welcome. Good to know. Please share and subscribe.
I love this channel so much. Thank you, Robojax
TYSM Sir
Code explained very well
The best part is you also commented each statement
May GBU 💖😘✌
You are welcome. May GBU too.
Robojax, you are the best!
So you are. thanks. There is the better video with wiring diagram ua-cam.com/video/pxUjEsJQW2M/v-deo.html which is part of my Arduino course
One absolute essential when soldering is to KEEP YOUR SOLDERING IRON TIP CLEAN TO ENABLE EFFECTIVE HEAT TRANSFER!!!
honestly i watch a lot tutorial this is one of the best ! keep it up bro !
Thanks, will do!
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.
I don't know if your interested in this but I found the "lcd.init();" in the Liquid Crystal I2C example "Serial Display".
you have not installed the correct library. I made another tutorial with the same library here ua-cam.com/video/NXAswOc_2zg/v-deo.html and used lcd.begin() and it works fine. you are using wrong library.
Great explanation. Thanks for your lesson. One question...can you control the backlight and/ or contrast of the I2C LCD using just the code?
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🥰
I have used this display on may be over 50 or more sensors. just search my channel.
Well Done! Comprehensive tutorial on how to use this inexpensive device.
Thank you. Good to hear that.
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.
how??
@@Omsharmaji30 explain what you don’t know how to do 🙄
Thankyou bro it really help me
Outstanding explanation 👌
Your videos must surely be of the best on the net👍
Thank you for the lcd library
Thanks for a great video! Very clear explanations and pleasantly helpful!
3:37 A0 A1 A2... good but what are they used for? :)
Your questions seems very baisc . You need to take a course. Please watch this video ua-cam.com/video/X8OJjMIHCrw/v-deo.htmlsi=p0SVWoynWuSD16t2 this video is Larry of 30 lessons cours
This was so helpful for my project, thank you!
Great video! Followed along and it worked perfectly. Thanks!
You are welcome. Good to hear that.
Hello Robojax :)… I have just watched your tutorial and found it very informative. Thank you very much, John 👍😊
Hell John, you are welcome. I am pleased you found it useful.
Hello John I found your tutorial very informative. I am doing a project for level controller.
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?
Well done!
Everything is clear and easy to recreate.
Thank you.
Thanks...Just what I needed to for 1602 LCD I2C Display module.
You are welcome.
Thanks, been around, finally got it working
You are welcome. I am glad you did.
@@robojax hey my lcd is just lighting up but no text :(
@@fps3689 Same here
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.
Very nice Tutorials
Glad you like them!
thank you sir great explanation sir from srilanka
Thanks ......... it really helped
It helps a lot.. You are so Great my friend :)
I am glad it did. Thank you
thanks man
omg i finally found it
man thanks
Glad I could help
@@robojax can you subscribe to this channel = ua-cam.com/channels/-z6vzILUoG3FVtW5mWl1ww.html
Thank you so much!!!!👍
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
My pleasure. You may continue learning Arduino with my course . Link is in description
Thank you very much for this tutorial.
You are welcome. If you watched with other than English subtitle, please let me know. Thanks
Very nice tutorial ! Thanks
You are welcome!
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?
Just search my channel and you will be surprised. Here is the code and video ua-cam.com/video/qB0drI56zGE/v-deo.html
@@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?
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
there is 20X4 and I will upload the video in coming days. But have not heard 20x5.
Oops ;) you have right, I mistyped the actual size is 20x4 exactly what you say is correct. Regards and thanks very much.
Make a video on i2c keypad interfacing with arduino please
no seen or found keypad using i2C.
Please search on it on google
Please search on it on google
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..
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.
Thanks Nick. That was all it took to display the characters.
thanks , i was about to smash the thing on the floor
thank you! worked perfectly
You are welcome.
Ur channel is awesome.
Thank you.
we are original manufactory for LCD display, if you need 1602A pls let me know. mail to maoshengelectronics@gmail.com
I had subscribed to a bunch of people and I was trying not to subscribe to more people, but I had to subscribe
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?
you gott install the library mention and shown. over 100,000 people have used this library
Should we female header pin to solder??
Mine didn't work on A5 and A4. Only works in SLC1 and SDA1. Also address is 0x3F instead of 0x27 for some reason.
The manufacturers set in hardware. here my video if you want to set different address ua-cam.com/video/bqMMIbmYJS0/v-deo.html also A4 and A4 should work with Arduino UNO for others boards see the pins here www.arduino.cc/en/reference/wire
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 :)
Thank you very much!
You're welcome!
thanks bro it helped a lot
you are welcome. Few weeks back I published my Arduino course worth $200 on Udemy. Arduino Step by Step Course (over 100 lectures) Starts here robojax.com/L/?id=338
Thank You Ayak
Ayak?
Thank you
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.
This solved my issue. I was sure it wouldn't, as it defies logic lol.
thank you
Thanks very much !!
You are very welcome.
شكرا لك متابعك من العراق
مرحبًا بكم في Robojax. أحمد من كندا. أصله من خراسان الكبير.
Good Tutorial, Well explained :):):)
Glad you liked it!
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!
1-See this video which I have explained the I2C address: ua-cam.com/video/bqMMIbmYJS0/v-deo.html
2-Yes I works. I have another video for LCD2004 display: ua-cam.com/video/DKmNSCMPDjE/v-deo.html
Possible to explain the analog part? what if I wan other analog pin, rather than analog A05 / A04?
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. ua-cam.com/video/pxUjEsJQW2M/v-deo.html 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
Why didn't you use simple LiquidCrystal library? Does the driver change the way of using library or something?
I tried many libraries and this was the best of all without any issue. In every video I made on LCD, I used it.
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?
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.
Thanks 😊
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.
Adjust using potentiometer. I have shown in video.
@@robojax I tried, but that's not the problem
The close up photography is good but I stopped after 4 minutes as its unclear what is meant by A0, A1, A2 is not soldered this point can be soldered together. "This point" is singular while "together" is plural. Do you mean "These points" are to be connected to each other by soldering? The photo does not show them connected to each other. Is one to solder all 3 points together (A0 to A1, to A2)? "This point can b soldered together " is similar to saying "one of the legs are both the same". Respectfully the value of this video could be improved with some clarity on what to solder regarding A0, A1, & A2 .
that topic was out of focus of this tutorial. Explaining I2C address would have made the video very long. you may watch it her ua-cam.com/video/bqMMIbmYJS0/v-deo.html
hi i can't find the library so can you give me the link of it please
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
the shows error, I need help
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 ua-cam.com/video/pxUjEsJQW2M/v-deo.html
Can Arduino be used to produce business goods? What is your opinion on this?
Yes of course. There are so many companies offering industrial Arduino product.
Thanks you sir for reply
Hey bro, how to code this. while red LED is on, LCD will display "RED LED ON" , while yellow LED is on, LCD will display "YELLOW LED ON"
how and when the LED is turned ON? once you turn it on just add this lcd.print("RED LED ON"); to where the LED is turned ON. If you further help, please share your LED code here codeshare.io/ and once you posted your code, this website will create automatically the URL (address)for your code. Then copy and paste the URL here and I will look at it to help you.
Thanks for the answer.
You are welcome.
Very good video. You've helped me! =) Thank you! =)))
You are welcome. Good to hear it helped you.
خیلی عالی دستتون درد نکه
سلامت باشید. این هم نسخۀ فارسی خالص اید ویدیو در مجرای "علم وفن" ua-cam.com/video/1-ceRuyDkbQ/v-deo.html
Thank u sir
You are welcome.
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?
That’s that only way.
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?
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.
I have a blue screen .. how do I solve this?
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.
Your codes work... but screen is still blue which is weird
Solved it!
@@nickthewinner2194 What was your issue? I'm having white on top and blue on bottom.
@@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
Side note in 2022. I had to change LCD.begin(); to LCD.init(); in order for this program to work
May be you are using different library. I have mode over 50 projects in this way
@@robojax not sure. I used the standard libraries for uno. Anyhow just thought I would share my experience incase someone else gets stuck like I did. Thanks for you videos.
you have not installed the correct library. I made another tutorial with the same library here ua-cam.com/video/NXAswOc_2zg/v-deo.html and used lcd.begin() and it works fine. you are using wrong library.
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?
Adjust the potentiometer until you see the text
@@robojax I had the same problem with her and when I adjusted th pot, only boxes shows
@@robojax pls help
I'm not getting the output displayed. LCD is on, i also checked the I2C address and its 0x27 only. What should i do?
use potentiometer to set it properly. Watch the video it should work.
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?
NO. That is what you should use. A4 and A5 are the same pins.
Please help Nothing is apearing on the LCD
The back light is on but no words are showing up
Turn the potentiometer to three left or right
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
Perhaps you have not installed the right library.
Do you need to use the i2c bored or can you just use the lcd on its own
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 ua-cam.com/video/S4ya3Q7uhJs/v-deo.html
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
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.
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
Please download and include the library.
change lcd.begin(); to lcd.init();
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
you have not installed the correct library. I made another tutorial with the same library here ua-cam.com/video/NXAswOc_2zg/v-deo.html and used lcd.begin() and it works fine. you are using wrong library.
Can we do this without soldering
Yes if you can hold the module with your hand pressed on the display
May i know What is SCL line Frequency here?
The baseline is 100kHz but you can change it. here is the page where you can read further www.arduino.cc/en/Reference/WireSetClock
Thanks a lot.
you are welcome. Thank you for not skipping the ads and keep watching them. This will help me a lot.
thx🙂
PIN 1 》GROUND
PIN 2 》POSITIVE
PIN 3 》10K POT
PIN 4 》A12
PIN 5 》GROUND
PIN 6 》A11
PIN 11 》A5
PIN 12 》A4
PIN 13 》A3
PIN 14 》A2
PIN 15 》220Ω
PIN 16 》GROUND
No Thai won’t work. This display has I2C module and has only 4 wires shown in the video. For the display without the module see my other video
PINOUT WITHOUT I2C
NORMAL CONNECTION BETWEEN UNO AND 16*2
this library only work with specific backpacks
"packpacks"? it works with any LCD 1602 or 2004 which has the I2C module.
Please help
I am getting, compilation error: no matching function for call to "Liquid Crystal_I2C::begin()"
Okay I figured it out had to remove the other LCD libraries and restart the IDE
it said that no matching function for call to 'LiquidCrystal_12c::begin()'
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.
Because you did not include the library. Watch again, download library and add it to your Arduino IDE (Arduino program)
I ran into this problem as well. Use lcd.init(); instead of lcd.begin();
Robojax can i run 8 display on single arduino?
@@ahmadhazim7053 you can fix this by deleting the other LiquidCrystal libreries
forum.arduino.cc/index.php?topic=581907.0
Hey sir code is getting uploaded and backlight is also glowing but the text r not visible so please help!
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 ua-cam.com/video/pxUjEsJQW2M/v-deo.html which is part of the Arduino step by step course
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?
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.
How could I use this display for home theatre monitor?
Search my channel for thermostat
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?
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.
Hello sir, I know it has been 3 years. But can you help me with my problem?
The error code is
-no matching function for call to 'LiquidCrystal_I2C: :begin(int, int)'
I'm looking forward for your reply. I would like to show you the full error code if possible though.
Hello, you are watching very old video. here is the better video with wiring diagram ua-cam.com/video/pxUjEsJQW2M/v-deo.html your error says that you did not watch the video. You have not installed the library.
@@robojax thank you. Got the fix.
This is Raju
I have tried out more on my project by following your procedure but it is not working
Please solve my below problem.
SerialDisplay:13:12: error: no matching function for call to 'LiquidCrystal_I2C::begin()'
lcd.begin();
Thanks for your answer
Hi Radu, it is because you have escaped the video. Watch it fully and I can assure you it will work as it did work for over 100,000 people.
Yes sir I will try once again
lcd. Initi (); is working instead of lcd.begin(); in you code I don't know what is the problem
Will re install my library sir
you have not installed the correct library. I made another tutorial with the same library here ua-cam.com/video/NXAswOc_2zg/v-deo.html and used lcd.begin() and it works fine. you are using wrong library.
can i run a program after uploading it with arduino then removing arduino and using i2c instead
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 ua-cam.com/video/Mbb2xa1WcRM/v-deo.html
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)
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.
Robojax I was thinking about getting a 5v battery eliminator / power supply, instead of a battery. Not sure if it will work
sir i installed the library but i am still getting lcd.begin(); error .. please help me..
Please watch the latest new video which is part of the course ua-cam.com/video/pxUjEsJQW2M/v-deo.html
Hello sir, i followed everything on the video but it wont display the characters only blank lcd screen that is turned. Help!
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.
@@robojax okay sir thank you and btw it works!
you are welcome.