Added three buttons and two NTCs #7
Description
Hello, few weeks ago I made a small preheater and I accidentally stumbled on your project with almost the same components I already made mine controller
Mostly I'm using it as a preheater, not as a reflow hotplate, so that's why I added three buttons to quickly set three different temperatures in Manual mode and two small NTCs so I could measure the temperature at specific spots on the PCB.
Since I'm not so good at programming, I used your code (it's working good, thanks) and just added zero-cross circuit (not yet implemented in the code), Sn63Pb37 profile and a few functions for buttons and for displaying two additional NTC temperatures.
It's not finished yet (have to add a rotating PCB fixture and find the last lost 1.3" OLED 😄), but if it seems useful, I'll post the details.
