Finally, I marked this project as COMPLETE!!
I've finished and verified the latest 3.5 board is working, and the wifi add-on works, jumpers and header work for flashing, etc. At this point there will be NO more hardware updates, the PCB design is complete.
From this point moving forward, all updates will be SOFTWARE ONLY :)
I hope to have a v1.1.0 release within the next month or so, which will have initial wifi setup included, NO actual wifi usage with the oven, only the setup GUI that will allow you to configure and connect to your wifi, display the connection info, etc..
Also in the coming weeks I will enhance and finalize the build instructions, installation instructions, etc (adding the info for the 7.0" resistor changes for the backlight power), and also start working on a USER'S GUIDE, which will have photos and explanations of all the menus, sub-menus, etc.
*** FYI ***
This board is only $30 or so to make from JLCPCB, I highly suggest ordering from there or somewhere similar..
I had my last two version done from them, and they were awesome, zero issues.
(I only have the link to oshpark because you can share projects from there, but I do NOT recommend using them, as this board is $200 from them)
PCB gerbers, etc are in the github repo, as well as you can download them from the oshpark link.