Like several other posts I've seen on here, I'm planning on writing my own control software and running it on an ESP32. Unfortunately I do not have any good outdoor space to test it, so I was planning on flying it indoors. From my understanding that's pretty much a terrible idea unless I limit it to the nano / ~40mm / 1S size class.
The small size is otherwise fine for my purposes, but the specific problem I'm having is in finding any standalone 1S ESCs. Pretty much all I see are the AIO boards with the flight controller built in, and as far as I know it's not possible to use the integrated ESC on them with my own FC. The only thing I've found is the [MX-5A](https://www.aliexpress.us/item/