Hello Tom, came across this post and used it to create my own setup
All working BUT have a couple of problems
- Logging time seems to not stop when boiler watts are low. Counts non burning time as well as when boiler is active
- How did you to the last bit, calc oil usage and coundown of tank capacity?
Did not want to reinvent the wheel so though worth asking;-)
great idea using Shelly power monitor
All best,
Nick