or should I say: "my to-read list"?
There are a lot of projects around. They bring a lot of inspiration, thoughts, and ideas, ... For example, this one, named PERSEUS-9:
It is a two-board
I have to confess: I had a lot of fun with ESP8266 modules. It's a perfect replacement when you need an Arduino with connection. Later, when ESP32 came, I plan to use those