Uploaded December 2019 | Updated September 2026, 1 week ago

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In this video, I'll describe the "Blue Display" Arduino library, which allows you to use an Android device to remote control an Arduino sketch via Bluetooth. What's unusual about this library compared to other similar Arduino Bluetooth code examples is that not only does the Blue Display library define the behaviour of how the Arduino responds to Bluetooth messages, but it also defines the GUI user interface which is displayed on the client device (i.e. a mobile phone), which itself is sent via Bluetooth on connection... pretty neat!
You can find the Blue Display library at github.com/ArminJo/android-blue-display/blob/master/README.md

I'm using an HC-05 Bluetooth module, which you can get for just $3 from banggood.com/custlink/DvmGNF87NU


Part of my Tech Advent Calender for 2019!
For my projects, see patreon.com/playfultech