How do create a graph of how long a device was on for the day, week, month?

[rlkoshak (Rich Koshak)]

See:

https://communityshare.mitre.org/sites/p_and_p/policy_pages/2/2_5_7.aspx

Calculate time on and energy use for an item/switch rule

Hi all. just started using OpenHAB and loving it so far even with my limited coding skills. I have two z-wave switches controlling a heating cable on my roof and would like to track time they have been on and energy used by them (power is a constant of 1800W). I cannot figure out how to track number of hours a switch/item has been on so any help would be appreciated. this is my current rule (Roof is a group containing two switches): rule "roof cable on" when Item RoofCable changed or Item Te…

Rainforest Zigbee Smart Meter support

Has anyone incorporated a Rainforest EAGLE™ Energy Access Gateway Link to Ethernet with REST API or the USB Raven into OpenHAB. I’m looking to get one but I want to figure out what will be the easiest to implement to monitor my smart meter. documentation can be found HERE

Total used last week, last month, this year

I have daily totals being saved with persistence, I am looking for a clean way of totaling up values over a period such as last 7 days, last 30 days, so far this year, etc. Any pointers?