ESP32 based Bluetooth loudspeaker with 8 band spectrum analyzer. This is the stock firmware for the ThingPulse Icon64 devices.
Below list briefly explains what is displayed on the "GUI" (i.e. the LED matrix) in which state. Note that all icons are rendered in a pulsing manner.
- no BLE audio device connected to Icon64: heart icon (see image above)
- BLE audio device connected: Bluetooth icon
- BLE audio device connected and audio playback suspended (when once started): pause icon
- audio playing: spectrum analyzer