Super, No hidden agenda. I am just a tinkerer like all of you and was trying to get some feedback on my approach. I am sure that there are many of you have have much more experience in WLED controller design than I do. I did not share the schematic because if there is some fatal flaw in it, it might be used by others and they will end up with a fautly and possibly unworkable result.
The MOSFET is Q1. U1 is regulator with the inductor just below. Q2 is used to turn Q1 on/off. U3 is the level shifter. The black rectangular thing next to the ESP32 is the connector that I will use to program the ESP32.
Power comes in on the left, either through the barrel connector or the terminal block. This version does not provide a way to put in audio at all.
The point of my original post was to get some confidence that the pins I want to use are OK and that I haven’t selected some that WLED does not support. I would have preferred to use the ESP32-C3 but I was not sure if WLED fully supported that device or it was still “experimental.”
I have order 10 blank boards and they should arrive late next week. I guess I will get my questions answered then. 
As to what I use for design, I use CircuitMaker. It does the schematic capture and the layout. It can generate all the fab files that I need. I send them to ALLPCB and voila, in about 7 days I have my boards and the stencil if I need it for mounting the SMD components.
At present I have no plans to sell this device. I am not sure if I could ever make it at a low enough cost to make it worthwhile. I would think it would come in around $10 if I really work at it. Add another $10 for me and it has a $20 sale price. In my view, not a good enough difference between what the commercial versions cost.
On that note though, I was very disappointed with one aspect of the Athom LP8 units I have. They were great up until I separated the controllers from the first LEDs by as little at 6-7 feet. I would get the random white flash about every 10-30 seconds. These were 12V LED strands with about 100-200 LEDs with a 5A power supply.
I looked into RS485 interface options but they were all 5V. Once again, I decided to design my own. It is one PBC with a jumper to select whether it is a transmitter or receiver. It accepts 5-24V. What I think is the best feature is that the connection between the transmitter and the receiver is made with standard 6-conductor phone wire through a RJ12 connector.
I have ordered those boards as well. If they work out, I can share that design. I might also offer those for sale since I don’t know of anything simular that is already available.
