By opening up the serial monitor in the upright corner, Arduino will scan the address range looking for a reply. Most Arduino board will show 0x27, however it be other number. After above operations are completed, connect the Arduino board to your computer using the USB cable. To use the I2C protocol with an LCD display and Arduino, there is a special library to be downloaded and included in the code. The name of this library is Liquid Crystal I2C.
Download the library, a zip file you can download it from here and extract the contents in the libraries folder of the Arduino IDE. ZIP library from the menu. You can download the sketch from this link or copy below code to your Arduino IDE window:. Wait a few seconds — you should see the RX and TX leds on the board flashing. In this experiment, the sketch will make a connection between Arduino and I2C LCD display and then print a text on two lines. DownLoad Url osoyoo. When I try to change the array1 to a longer message about 40 characters , it only does the first 24 on the first line, the rest is on the second.
Is this something I am doing wrong or a limitation to the I2C protocol? You must be logged in to post a comment. If cols and rows are not specified, library assumes 16x2. At this point the lcd is already cleared and the cursor set to home, so we don't need to call lcd. However when you need to clear all and place the cursor at 0,0 use:.
Printing special characters Thanks to The Raspberry Pi guy 's library we have two methods to print special characters:. Warning: if you use this method with string format you need to escape the placeholder using double curly brackets.
Jan 13, Download the file for your platform. If you're not sure which to choose, learn more about installing packages. Warning Some features may not work without JavaScript.
Please try enabling it if you encounter problems. Do not unzip it. PS you can have more than one IDE version on you computer at once. Hi, No worries, it may be because of IDE upgrades from when the library was previously edited, may have caused the need to do the last library update. That version of the library was written assuming that the library will be installed in the Arduino IDE installation folder, which is a very bad idea, and also that the Wire library is located in a place where it no longer is.
I don't know what the author was thinking. My sketch includes Wire. I have tried to follow the procedure in learning "Installing Additional Arduino Libraries" I must be doing something fundamentally wrong! I see that the latest version is 1. I must say I am getting confused.
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