The idea is simple, but the development not so much hehe. By a button on a board connected to Internet, activates the sound of a melody (whose mp3 file you have selected) in another board connected to Internet too (the Doorbell).
For get the code on: https://www.hackster.io/LaurenceHR/remote-doorbell-with-custom-mp3-song-with-cayenne-746c40
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