Cicero wrote:I'm going to be Cpt BuzzKill here, but unfortunately you are on the back foot very early on trying to charge $50 for what I can see adds nothing new to the table, and is just a bare PCB without a housing even.
Sonoff's are amazingly cheap, and have a lot of additional product integrations, for eg: Amazon Echo.
Yep, I made that point also. In addition, what innovation or novelty does this bring? It really is misguided to have spent 2 years R&D (OP's quote) on a rehash of something already for sale. You could have just copied the Chinese verbatim. This is, of course, what the Chinese do of the West's products.
As I have said before, it is a personal achievement to design and get something to market, but likely in vain, due to a commercial flop, then it is a failure. You will have wasted 2 years of your life, and presumably your money too. In Britain we have learned to our detriment, that product/engineering excellence does not translate into a viable product that makes money.