I've scoured for a clear explanation of how to change the brown-out detection from the set 2.7v to the higher 4.3v but after much head banging, I'm turning to asking the question.
The root issue is I'm seeing instability of saved info to eeprom and much research leads me to believe it's due to a period of low voltage, and that setting the BOD to 4.3v will help. This is an automotive application with much filtering and regulating before the Arduino.
My issue is; I can successfully burn a new bootloader with BOD of 4.3v, but then my program either does not load (I get a clock sync error), or it doesn't fully work (some like interrupts sections don't work).
Does there exist a step by step that explains how to get from A to B without leaving out steps like "now change the extended fuse value in the boards.txt file" (just an example, don't know if this is actually needed)?
Board is Arduino Pro or Pro Mini (5V, 16 MHz) w/ ATmega328p. Can someone verify the fuse settings should be low_fuses=0xFF, high_fuses=0xDA, extended_fuses=0xFC to just set the BOD to 4.3v?
Thanks! I truly appreciate the help!