#rtttl — Public Fediverse posts

You can find a whole lot of huge zip files containing wagonloads of #RTTTL #ringtones in the form of text files. There's some baby songs, but the vast majority it's stuff you would have had as ringtone at that time. That's why one of the songs I chose is #moonlightshadow 🪩
That's SO 80s!
Also, I couldn't miss #supermario and #monkeyisland themes.
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The funniest part, howewer, is how I made it #play #music. I know I can toggle a pin to produce a square wave with a certain frequency, but I don't know anything about music and correspondence between notes and frequencies, and I surely didn't want to reinvent the wheel.
The recommended way to play music with a #microcontroller is to use a #DAC meant for that, or some sort of polyphonic chip, but I needed a simpler and hackier way.
And i found it in the awesome #esphome documentation: https://esphome.io/components/rtttl.html
ESPHome supports #RTTTL. What's RTTTL? Do you remember painstakingly typing letters on your #Nokia gummy keyboard, copying it from some #90s magazine, to have the last and greatest #ringtones? Yes, that format was called RTTTL, and is supported by ESPHome! What a trip in the past!
I'm deadly serious, just look at the relevant wikipedia page! https://en.wikipedia.org/wiki/Ring_Tone_Text_Transfer_Language
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