Grouping and volume are what I use most, and going into the app every time is annoying.
On the speakers themselves you can only group by walking over to one and long-holding the play button.
There is no way to raise the volume of a whole group at all.
I am blown away by how quickly this came together and how well it works. I programmed my first C game on a ti92plus in 2000.
I read all the code codex wrote and it gave me memories from my early years of coding.
The ESP32 is really fast and a great piece of hardware.
I am excited to build more.