This is not the way s/w release are normally handled as you normally don’t make such a major change between a final release candidate and the final release. What was particularly frustrating was that were ways to provide backward compatibility for almost all the changes to ensure that the pre 1.0x libraries would continue to work.
#Arduino lcd library problems code
Change the code and break all arduino 3rd party library. No beta, no release candidate for testing. They consciously decided to break 100% of ALL the existing Arduino 3rd party libraries and to do that in between the final 1.0 release candidate and the final 1.0 release. The issue goes back to a major problem the Arduino team created when they released Arduino 1.0Īfter the final release candidate, but before they create the official 1.0 release The arduino team made some changes that broke 100% of ALL the existing 3rd party libraries. The library has to check if it is being used on pre 1.0 or 1.0 and beyond and when used in 1.0 and beyond the code was wrong. It is that IDE 1.0 and beyond uses different APIs than pre 1.0 and the code in this library was not properly using the IDE 1.0 interface. It isn’t a fix that that is related to any sort of project. Seeing the whole context in the code, I get the feeling that the compiler instructions are meant to only apply the fix for certain Arduino projects … I downloaded the newest version (1.1.2) and the source (.cpp) contains the code snippet of DonPedro’s fix. I inherited the setup from a student and did not realize the library was available through the library manager of the IDE … If it doesn't work, you will need to use a different library and I would recommend using a library that can be configured to work on any backpack.īill, many thanks for the pointer to the library manager.
#Arduino lcd library problems update
If it does, all you need to do is update it to the latest version. If you are lucky, the LiquidCrystal_I2C library supplied by the library manager works with your h/w. Most are hard coded for a specific version of a backpack, and some can be configured to work with any backpack. It is an actual bug in the library that was previously hidden that now shows up on more recent versions of the IDE.Ĭompounding things, is that there are multiple different libraries that provide a "LiquidCrystal_I2C" class and they work differently. The issue of only printing a single character in this thread is not related to this configurability issue. The reason I say "works with your hardware" is that this library is not configurable and so it doesn't work with all i2c PCF8474 based backpacks. If this LiquidCrystal_I2C library works with your hardware, (you are seeing only the single character) then all you need to do is update it using the library manager. The LiquidCrystal_I2C library has been correctly updated and is available using the library manager. please help.Īrduinolaf, when a library is broken the only way to correct the problem is to fix the library and so yes your code can only work properly when you have a correctly working library. LiquidCrystal_I2C lcd(0x27,16,2) // run ic2_scanner sketch and get the IC2 address, which is 0x27 in my caseīut why it doesn’t print the whole text ? it’s really annoying. it can however print the text if i print each char separately. the problem is just in lcd.print(text) where it just prints the first char. i tried to test some other functions such as setCursor, and serial.read/write and they worked perfectly. Hi, I have tried to print some texts with my I2C display, i have downloaded the LiquidCrystal_I2C library and tried to run a simple code that prints a simple text like " Hello World", what it does is that it only prints the first character of the text, so the output in the display would be just “H”, i tried some other texts in both rows and it just prints the first char in each row.
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