First Steps with the Arduino-UNO | Maker, MakerED, Maker-Spaces, Coding | Useful Tips | I2C LCD-Display Errors Solving

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LCD-Display Errors Solving

WHO doesn’t have that error already with LCD-Displays: Once uploaded (compiling) the code to the Arduino IDE there could be some errors happening, it happens to me… Please check PIC below:

 

Click image, please, to enlarge

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Well I made some searches on the internet and I found the right answer on a forum about this error, which says that one should scan the I2C Address of the device and replace the “lcd.init();” by “lcd.begin (0x3F,16,2);” whereby “0x3F” is the I2C Address of my LCD1602/I2C module. I scanned to find out the I2C Addess with this sketch, please check here:

• https://playground.arduino.cc/Main/I2cScanner
• …

I bought 3 from Amazon (Germany) delivered from “AZ Delivery” <===>  https://www.amazon.de/gp/product/B079T1BW6T  <===> and they should have had ALL the I2C-Address “0X27” as explained in their FREE eBook <===>  https://bibliothek.az-delivery.de/wp-content/uploads/2018/01/11-AZ-Delivery_16x2LCD-I2C-Display-Bundle_Startertutorial.pdf   <===> but ONLY 1 had this address and two others the I2C-Address “0X3F”!! BTW: AZ Delivery has very GOOD stuff for reasonable prices!

Here below the results of the scan of the I2C-Address, shown in the Serial-Monitor of the Arduino IDE:.

 

Click image, please, to enlarge.

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Click image, please, to enlarge.

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SO, make sure to FIRST scan the I2C-Address through the above mentioned Sketch, will save you a lot of stress! 😉

TIP: Use a DYMO, print out the I2C-Addresses and glue them on the backside of the LCD1602 Display, so you know for next projects WHAT I2C-Address the module has! 😉 In a couple of weeks you wouldn’t remind it anymore! 

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Click image, please, to enlarge.

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Resolving the ERROR message

Coming back to resolve our ERROR-message and how to resolve it:

Please check the PIC below:

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Click the image, please, to enlarge.

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Check the lines marked with ***************************, in my case it is lines 36 and 40-52! Change it as it is displayed above, save it and upload it; it should work correctly now!

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Stay tuned for next blog posts and enjoy it 😉

Have FUN with your “LEARNing-By-Doing project” and try out ALSO the other examples 😉

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Keywords necessary for me to create this blog post: Arduino, Coding, Maker, MakerED, MakerSpaces, Learning By Doing, Learning To Learn, PracTICE, LCD-Displays, I2C,

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L’auteur Gust MEES est Formateur andragogique / pédagogique TIC, membre du “Comité Conseil” de “Luxembourg Safer Internet” (LuSI), appelé maintenant BEESECURE, partenaire officiel (consultant) du Ministère de l’éducation au Luxembourg du projet  ”MySecureIT“, partenaire officiel du Ministère du Commerce au Luxembourg du projet ”CASES” (Cyberworld Awareness and Security Enhancement Structure). L’auteur était aussi gagnant d’un concours en électronique en 1979 ( Pays germaniques ) et voyait son projet publié dans le magazine électronique “ELO”. The author Gust MEES is ICT Course Instructor, ”Member of the Advisory Board” from “Luxembourg Safer Internet” (LuSI), BEESECURE, Official Partner (Consultant) from the Ministry of Education in Luxembourg, project “MySecureIT“, Official Partner from the Ministry of Commerce in Luxembourg, project “CASES” (Cyberworld Awareness and Security Enhancement Structure). The author was also a winner of an electronics contest (Germanic countries) in 1979 and got his project published in the “Electronics Magazine ELO”.

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Stay tuned for next blog post(s) 😉..

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