21st Century Learning and Teaching

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

Learn more / En savoir plus / Mehr erfahren:

https://www.scoop.it/t/21st-century-learning-and-teaching/?&tag=ARDUINO

https://www.scoop.it/t/21st-century-learning-and-teaching/?&tag=I2C

image2cpp is a simple tool to change images into byte arrays to use with (monochrome) displays suchs as OLEDs, like those from Adafruit or Sparkfun.

While searching for a way to generate these arrays, I mostly found links to a piece of Windows software. Both the flakey results and the hassle of having to boot a virtual machine just to convert an image lead to me writing this pure html + javascript solution.

Alternatively you can also enter a byte array as input to turn it back into an image. This might be useful for debugging, or when you want to write the byte array yourself. I don't know.

Running the tool

You don't need any special dependencies / internet connection; all the necessary parts sit in a single .html file. So just open this index.html page in a (recent) browser to run the tool.

Or you can use the online version at:  

http://javl.github.io/image2cpp/

Learn more / En savoir plus / Mehr erfahren:

https://www.scoop.it/t/21st-century-learning-and-teaching/?&tag=ARDUINO

BTW: Above shown image is my "MAUSI", which was the "Mascot" for my Cyber-Security courses in Luxembourg EDUcation in 2003-2007. Those courses were mandatory for students up from 12 years old (7èmes).

Learn more about Cyber-Security in Luxembourg (Europe):

https://gustmees.wordpress.com/2017/11/22/luxembourg-and-cyber-security-how-did-it-start/

We were already playing around with a 2.8 inch TFT Display and SDCard recently in a previous tutorial <===> First Steps with the Arduino-UNO R3 | Maker, MakerED, Coding | 2.8″ TFT Touch Screen with SDCard <===> and we will create a badge. 

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https://www.scoop.it/t/21st-century-learning-and-teaching/?&tag=ARDUINO

Super Starter Kit UNO R3 Project From Elegoo. In one of my previous blog posts I used Arduino-UNO Starter Kit, which I ordered at Conrad (English version) and I wasn't really impressed by the manual, it didn't satisfy to my expectations and needs. SO, I was looking around to find some distributors for a BETTER version...…

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https://gustmees.wordpress.com/?s=arduino