I read in your post that you are recording for the solar eclipse. I am from the Eclipse Soundscapes team. If you are recording for eclipse soundscapes, then the AudioMoth from us should have a continuous red and flashing green when in Custom mode. As previously mentioned, this means it's ready for the time chime. If it's flashing red and green, you probably need to update the firmware. We have instructions on how to do this on the Data Collector page on EclipseSoundscapes.org. If you need more help please reach out at info@EclipseSoundscapes.org
That's great news!