I noticed a strange OS 3.0 behavior while experimenting with relays:
My 8 relay board has optoisolators, which sink about 10mA/channel. So, I decided to use the 5V ( marked VIN on the OS 3.0 board ) to power the optoisolators. This works fine, but when I decided to set the BOOST time to 0ms, it refused to save and always shows 320ms.
I want to disable the booster, because it is not needed for relays.
What I have to do for the purpose? I can disable it in the hardware, but don’t like to cut traces.