Like many people around the world, I have a relative suffering from Alzheimers.  He is still engaged with the world, but can no longer operate anything with multiple buttons or even the simplest remote control.  However, he still likes music, and particularly the radio station he has listened to all his life.

So I’m setting out to build a radio with only ONE button.  It should stream music or a radio station over WiFi, and be configured from mobile phone or PC  using a small built-in web server.  All he needs to do is push the button to turn it on.  Pressing it again will turn it off, or it will switch off after a pre-determined time if he walks away.

The chosen platform is ESP32, using the ESPAudio library and a PCM5102A I2S audio output along with a small 3W+3W digital amplifier.  This is almost the same setup we use in our Autonomous Loudspeaker project.