I’ve spent my entire week trying to figure this out, but without any luck.
I’m working on a project that needs to run at 3.6v so using the ATMega328P @16Mhz is unstable and not recommended. So I figure the best solution would be to run it at 8Mhz (with an external crystal for better accuaracy)
The problem is that I don’t know how to change this. I’ve read several post here and other forums, even try to use optiboot but that [optiboot] only mess my head up.
I don’t care if I need to use the UNO as ISP or if I can directly upload sketches from Arduino IDE (v1.6.9), I just need it to work for now, then I’ll go a little deeper
Could someone please provide an easy how-to?
Thank you very much, and please excuse my English is not my native language.