Arduino I2c Lcd 16x2 Library Download

This library allows an Arduino board to control LiquidCrystal displays (LCDs) based on the Hitachi HD44780 (or a compatible) chipset, which is found on most text-based LCDs. The library works with in either 4- or 8-bit mode (i.e. using 4 or 8 data lines in addition to the rs, enable, and, optionally, the rw control lines).

The LiquidCrystal library allows you to control LCD displays that are compatible with the Hitachi HD44780 driver. There are many of them out there, and you can usually tell them by the 16-pin interface.

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The Hitachi-compatible LCDs can be controlled in two modes: 4-bit or 8-bit. The 4-bit mode requires seven I/O pins from the Arduino, while the 8-bit mode requires 11 pins. For displaying text on the screen, you can do most everything in 4-bit mode, so example shows how to control a 16x2 LCD in 4-bit mode.

I also use this library : GitHub - kiyoshigawa/LiquidCrystal_I2C: LiquidCrystal_I2C Library for Arduino designed to work with the Elefu Control Panel I2C LCD Backpack. (I also tried about 10 different libraries)

Another choice is to use a library, such as the one by Francisco Malpartida (fm), that has provisions to deal with many I2C adapters since the layout of the connections can be specified in the 'constructor'.

Here is a blog that seems to use your I2C adapter with fm's library. I suggest that you modify his example program to just display a simple message in setup() and keep loop() blank as you did in the program that you posted above.

Make sure that you follow the instructions for installing that library - specifically you must remove all traces of the I2C libraries that you have previously tried and you must also remove or rename the default LiquidCrystal library.

I'm also having issues with my qapass 16x2 LCD that came with serial module presolidered on to the LCD. I noticed 3 sets of pads A0 to A2. Could these be the same links I see on other boards that have pads marked bs0 -bs2. The picture of this is here Setting up wide.hk OLED I2C display - Displays - Arduino Forum

You need to be very methodical. i.e. don't change/try so many things all at once.

My suggestion, install the library referenced on their page.

I looked at the code and the board layout and they match so that code looks like it should work.

(At least it appears to be putting the lcd data and control lines on the proper output pins on the i2c chip)

Make sure to remove any other i2c lcd libraries to ensure you know which lcd i2c library is really

being used.

Look carefully at the i2c part. Who makes that chip? and it is a PCF8574T or a PCF8574AT ?

Different chips use different i2c base addresses.

Perhaps it is the AT chip?

If so, the i2c address should be 0x3f instead of 0x27

Hi, I connected my 16x2 LCD backpacked with PCF8574T to my Arduino Nano. I first tried to use the LiquidCrystal_PCF8574 library (using address 0x27) and it worked perfectly. Unfortunately, it does not contain some methods that are required by another piece of software I want to connect it with.

Therefore, I planned to use the (standard, I thought) library LiquidCrystal_I2C installed using the library manager. However, the display does not work with this library at all. The backlight turns on, I cannot see any text on the display (lcd.print("text")). The display seems to be initialized properly, the address is the same (0x27). Yet, nothing. The sketch compiles fine.

Hi, i am trying to use 16x2 lcd without using library. I wrote a simple program to drive the lcd.

I have some problem.

When i send a string (LCD_String) , every things works fine.

but when i send an integer(LCD_Int) , the display is not correct (Example:LCD_Int(123456789); , but i got -13035 + some weird symbol on the screen)

For example, when the Arduino starts, the display might be in 4-bit or in 8-bit mode. It needs a special sequence to capture control of the display. Also the use of the delays has been optimized in the LiquidCrystal library. There are a few other things with the lcd display and they all are solved in the LiquidCrystal library.

Hi, Thanks for your reply.

I know LiquidCrystal is a good library ,and i use it a lot.

I need to write my own code because somebody in the planet (AKA teacher) challenge me to not use the library, also i want to challenge(or punish ) my self to see what can i done.

You should be asking "What can i use if i don't use String?"

Note the capital S on the correct question. The answer is use strings (null terminated char arrays) instead of Strings (objects created by the String library). The latter are generally agreed to use memory less efficiently which is best avoided on a device such as the average Arduino.

i've got my i2c backpacked LCD (PCF8574-based one from ebay, like the Sainsmart or YFRobot ones) working with my Mega2560r3 using the newLiquidCrystal library but does anyone know how to get them working with the LiquidCrystal_I2C library?

It does seem odd that there are so many LiquidCrystal libraries floating about and pretty much the only one that works with the HD44780 with or without I2C is newLiquidCrystal! I had the same problem with the Raspberry Pi, I modified the Adafruit library to work with that (no I2C) after trying about five different ones.

I'll take a look and see what it would take.

I've taken a quick look at the USli2c library. It is unfortunate that the library object

was named TinyWireM rather than Wire but that can be handled with some clever #defines

It shouldn't be that difficult. The pain is that since it is different library and the STUPID! ide

doesn't automatically set up include paths to the libraries, the user sketch will have

to include the proper wire library or and if the user

wants a sketch that "just works" on any hardware ifdefs will be needed and the STUPID! ide

is too wimpy to understand ifdefs so I'm not sure it will work.

yes i had a go at getting it sorted but ended up with a mess of trying to rename all the Wire calls to TinyWireM ones, its not very portable that way, the author makes use of a bunch of ifdefs when he tried to make it work with the older LiquidCrystal library:

Thanks ianben. I wished I Iooked here first... would have saved me a few hours of frustration.

The vendor gave me the wrong I2c address and wrong version of library code.

I have a serial LCD from another vendor that I have been using for awhile and I thought this I2c module would be a snap to configure.

I was wrong.

Once you copy the entire folder in the Arduino library folder (UserData/Arduino/Libraries/), the IDE will find it automatically. You just need to include the header file of your new project (or example project).

Just initialize the MIDI library first. It will set up Pin 1 for serial output but since you are not sending any MIDI, just receiving with Pin 0, it may not be a problem that the LiquidCrystal library takes over Pin 1.

As soon as I add the initialise of the MIDI library (I do it in the order such that the 16x2 is initialised last) the 16x2 corrupts and remains corrupted. If I don't init the MIDI library, and only use MIDI over USB, then everything works fine. Although this proves the source of the problem, not using 5-pin MIDI is not an option.

Six arcade lights/buttons, using all of the PWM and analogue pins, one 16x2 display, one MIDI input port. These take up all the Arduino pins. Not sure what else you would need to know that would make a difference?

IMG_004719202560 608 KB

The bottom line is that I would ideally like to prevent the MIDI library from interfering with pin 1, so that I can use it for the 16x2.

I'm going to build a motorized slider for time lapse photography. I wanted to have a menu for adjusting some parameters and select different modes. I spent a lot of time in developing a own menu structure, tried the MenuBackend Library but ended up with changing an other existing menu library ( -bin/yabb2/YaBB.pl?num=1242443739).

I think that it was made for a pre-Arduino1.0 so I had to alter some things. It also used the digital ports and a 4x20 LCD. I changed it to operate with my LCD shield( -page-view/sainsmart-1602-lcd-keypad-shield-for-arduino-duemilanove-uno-mega2560-mega1280.html) which has a 2x16 LCD with a analog port keypad.

It's just a quick&dirty solution - so feel free to change and share your ideas.

@richardtr

Great library... Works fine!!! Thanx a lot for this. Helped me in my project. I would say best LCD Menu library (that I have seen and used) without needing additional hardware...

I would recommend this for Arduino Wiki page...

Mhel:

Do you guys know how to initialize LCD without using the LiquidCrystal library on Arduino? I totally new and I wanted to understand how to the initialization process. I have the hitachi 2x16 LCD. 17dc91bb1f