I have three always on One Pi3B+ connected to anemometer and single solar cell, uploads up to 60 secs of analog data reading every minute by CRON, then has oth

I have three always on One Pi3B+ connected to anemometer and single solar cell, uploads up to 60 secs of analog data reading every minute by CRON, then has other CROn stuff for emailing One Pi Zero for home security camera attached to motion sensor/rapid shutter mode, uploads to S3 bucket One Pi zero for reading HN news out loud in the morning by Amazon Polly, tracking solar cells on window, and then more scheduling stuff I have another one powered by USB, I intend to use it as "swappable dev stacks by sd card" through USB SSH