21st Century Learning and Teaching

Valentine's Day is around: GET creative with an LED Matrix and an Arduino! [Start Text Wikipedia] Valentine's Day, also called Saint Valentine's Day or the Feast of Saint Valentine,[2] is celebrated annually on February 14. Originating as a Western Christian feast day honoring one or two early saints named Valentinus, Valentine's Day is recognized as a significant cultural, religious,…

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ESP8266 WiFi Weather Station with Color TFT Display We were playing around already with LED MATRIX's, devices to visualize measured values and/or texts. In this blog post (Tutorial) we will use a TFT Display (Thin-film-transistor liquid-crystal display) with touch screen to display a three (3) days weather forecast with moon phases. This…

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https://www.scoop.it/t/21st-century-learning-and-teaching/?&tag=ESP8266+WiFi+Module

What's the secret of success while innovating? I hear you screaming already: I would like to be innovative, I even have some ideas BUT I am fearing about WHAT OTHERS would say and think about!! To be honest, NEVER look about WHAT OTHERS would say, innovation is something NEW and the new will…

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Arduino-NANO | DHT22 Temperature/Humidity with Meter

I was looking to find the most easy way to show people and to GET them interested into "Coding" with a minimum of components and expenses, as well as having directly a "success feeling" to be motivated to continue slowly but surely! Here it is; ONLY three…

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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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In our previous blog post (Tutorial…), we were playing around with a LED MATRIX <===> First Steps with the Arduino-UNO R3 | Maker, MakerED, Coding | Scrolling Text with 8×8 LED MATRIX  <===> and we will continue to use the LED MATRIX, but this time with a Wi-Fi connection. We will use the module “ESP8266” which you can purchase worldwide around as it is very popular and it costs ONLY 7.49 €.

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Scrolling Text with 8x8 LED MATRIX (4 Modules in One) . . . As we were playing around already with LED's in previous blog posts let us NOW try out a LED Matrix "4 in one"; its four (4) singular displays soldered on one piece of a single printed circuit board (PCB)...

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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/

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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/