Came across the thread as I was looking to see what I could do with the camera at night and it looks very interesting. I noticed a few complaints about the red power LED. I shut mine off automatically when the system boots up. In /etc/rc.local after the nohup line to start SkyWeather, add:
#Shut off red power led sudo sh -c 'echo 0 > /sys/class/leds/led1/brightness'
Awesome, thanks for that. There is lowpower.sh in the SDL_Pi_SkyWeather folder, but I havent looked at it to see if it runs by itself (called from another script) or if I needed to do something.. but added your line to /etc/rc.local and hoping that solves the red (and maybe blue) led issue... though I think the blue comes from my SunControl board.
With inside temp reaching 40*C yesterday, its only a matter of time before the blutac melts thats covering the cam LED
I didn't notice that script. Looking at it, it looks like it is for the PI Zero, which I think only has one LED for both activity and power since it doesn't have a wired adapter on it. Mine will shut it off on a PI 3, which I suppose I should have said is what I'm using.
Yes, there are blue ones on the Grove GPIO board. They don't show up under /dev/devices so SwitchDoc would have to tell us how to shut those off. <Hint, Hint>
Your parameters work well, a couple of quick suggestions you might want to try. If you're looking for best quality, you may want to set format to png with -e png as that is a lossless compression format. Also, if you set -sa -100, you can skip the conversion to B/W as it should then be in B/W as you've removed all color from the image.