Python's lovely [asyncio](https://docs.python.org/3/library/asyncio.html) library allows me to write event-driven programs in a style that looks much like multithreaded code but isn't. Combining [asyncio](https://docs.python.org/3/library/asyncio.html) with the equally lovely [Linux GPIO subsystem](https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git) is just another logical step. In this talk I show what [asyncio](https://docs.python.org/3/library/asyncio.html) is, how [libgpiod](https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git) works, and how both are used to do pointless projects. Continuing the [story of pointlessly blinking lights](https://www.faschingbauer.me/about/site/work-in-progress/blink/glt2023/index.html) from my last year's talk, I show * How GPIO interrupts are configured to get notified of hardware button presses, and how this can look like in Python (hint: *generators*, and *iteration*). * How button-events can be used in an ``async`` programming style (hint: *asyncronous generators*, and ``async for``). * How this fits into the pointless project of blinking lights. Additionally, I give an overview of async libraries that are more to the point, like * [Textual](https://textual.textualize.io/), a terminal UI framework * [python-sdbus](https://github.com/python-sdbus/python-sdbus), the Python binding for the systemd D-Bus client implementation "Slide" material available on [my homepage](https://www.faschingbauer.me/about/site/work-in-progress/blink/glt2024/index.html) Jörg Faschingbauer https://pretalx.linuxtage.at/glt24/talk/7XWWLC/ #glt24 #Hardware