Using LCD Displays with Arduino - 2018 Videos https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/ Discussion board for Robotics, Arduino, Raspberry Pi and other DIY electronics and modules. Join us today! en-US Sun, 11 Oct 2026 18:13:33 +0000 wpForo 60 RE: Using LCD Displays with Arduino https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-25292 Sun, 27 Feb 2022 14:57:20 +0000 I am totally new to arduino and C actually. I am in the progress of collecting basic hardware to begin experimenting. I am currently trying to connect an LCD 19264 to an I2C expander I found on ali. 

I ran into some problems, so I will post the spec here to see if you guys have any suggestions. I did solder everything together without taking any closer look. I can see now there are some differences in the boards..

MCP23017 IIC I2C SPI Serial Module 128*64 LCD 1602/2004/12864 1602LCD MCP23017 Adapter Board Contrast Adjustment for Arduino|Instrument Parts & Accessories| - AliExpress

RHECCOW 5v 19264 192*64 Graphic Matrix LCD LCM Module Blue Backlight White character 130*65|matrix lcd|lcd charactergraphic lcd module - AliExpress

Thanks :-)

]]> 2018 Videos Bluetooth https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-25292 RE: Using LCD Displays with Arduino https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17581 Mon, 22 Mar 2021 21:25:12 +0000 @etech_student

If I remember correctly it controls whether the back light is on or not.

]]> 2018 Videos codecage https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17581 RE: Using LCD Displays with Arduino https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17569 Mon, 22 Mar 2021 16:22:18 +0000 I was determined to succeed after devoting so much time to it, but I still do not know exactly what the "POSITIVE" command does. The same command also appears in the Temperature & Humidity Gauge sketch.

 

 

]]> 2018 Videos etech_student https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17569 RE: Using LCD Displays with Arduino https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17567 Mon, 22 Mar 2021 15:15:09 +0000 @etech_student

Glad you got things working! 👍 

]]> 2018 Videos codecage https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17567 RE: Using LCD Displays with Arduino https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17552 Sun, 21 Mar 2021 15:08:03 +0000 I have reviewed the  original video "Using LCD Displays with Arduino" and in it Bill does say to use the NewLiquidCrystal library for I2C  from github.com  If I had done this in the first place I would not have had all this trouble. I do not know where the LiquidCrystal library that I had installed came from but it worked on other projects so I assumed it to be ok. I have an existing stop watch that uses the library it is fine as the program  does not contain  that "POSITIVE" command.

]]> 2018 Videos etech_student https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17552 RE: Using LCD Displays with Arduino https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17550 Sun, 21 Mar 2021 13:03:51 +0000 Thank you very much codecage.  I cleared my library of existing liquidCrystalI2c libraries and went to GitHub downloaded  the zip file, and lo and behold it worked. The LCD_liquidCrystal_demo  2018  now verifies

]]> 2018 Videos etech_student https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17550 RE: Using LCD Displays with Arduino https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17548 Sun, 21 Mar 2021 11:43:41 +0000 @etech_student

In the case of that library it is actually buried in the .h and .cpp files themselves.  Version 1.1 is wat I found in those files.  I have never used the library you point out, but the one that was originally used for the video Bill produced.  That library has been relocated to GitHub at:  New-LiquidCrystal Library

]]> 2018 Videos codecage https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/3/#post-17548 RE: Using LCD Displays with Arduino https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/2/#post-17544 Sun, 21 Mar 2021 08:29:46 +0000 Where do I find the version number of the library.  It states it is compatible with the Arduino IDE 1.8.3 which is the version I am using and it was downloaded from https://github.com/lucasmaziero/LiquidCrystal_I2C

]]> 2018 Videos etech_student https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/2/#post-17544 RE: Using LCD Displays with Arduino https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/2/#post-17535 Sat, 20 Mar 2021 16:29:45 +0000
Posted by: @codecage

Bill even commented in the tread that he possibly needed to redo that lesson.  I personally hope he spends his time working on new material and leaves items like this as a "teaching" moment for users to "learn" how to "troubleshoot" their code.  Mainly because you'll find this issue many time going forward

Thanks Steve, my thoughts exactly! 

@rdacosta I moved your post into the thread about the LCD Display video, where, as you can see, this has already been discussed.

Unfortunately, libraries, especially ones from coders other than Adafruit or Sparkfun, will get updated and often "break" code relying upon older versions.  This is one big advantage of using Platform IO instead of the Arduino IDE - your library version follows the project individually so you can "mix and match" versions.

In the PlatformIO article & video, I used the LiquidCrystal_PCF8574 library, which is a good choice if you are using the I2C backpack with the display.

😎

Bill

 

]]> 2018 Videos DroneBot Workshop https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/2/#post-17535 RE: Using LCD Displays with Arduino https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/2/#post-17534 Sat, 20 Mar 2021 16:21:25 +0000 @etech_student

Can you go to the Library Manager in your Arduino IDE and provide us with the exact library you are using and the version number?  I'd like to be sure I'm using as close to exactly the same code as you are using to troubleshoot this issue.

]]> 2018 Videos codecage https://forum.dronebotworkshop.com/2018/using-lcd-displays-with-arduino/paged/2/#post-17534