-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Check out MotioneyeOS on a raspberry pi
https://github.com/motioneye-project/motioneyeos
https://www.adafruit.com/product/3414
As open == do things for yourself; you can easily put together a self charging 18650 battery kit or power from some other source.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.