Hi In addition to tracking electric consumption I also graph cost as this is more meaningful to the rest of the family. We are switching to Octopus where they have a variable tariff that is billed in 1/2 sessions all different. The billing rates are set the previous day some time after 16:00 UTC wh…

Hello @ian we are also interested in this here and while the current emoncms apps dont do this directly it is something we would like to improve support for. There is the time of use app that can explore the impact of variable price tariffs but it does not yet track the octopus api… I’ve been devel…

Great, I will read through that. As luck would have it I am using the sonoff plugs and relays already. This may save me some work. [image] Emoncms Demand Shaper module https://github.com/openenergymonitor/EmonESP/blob/control_merge/sonoffS20.md This link gives 404 error. Ian

Thanks for spotting, I have updated it, its now on a different branch name: https://github.com/openenergymonitor/EmonESP/blob/timer/sonoffS20.md

Hi @TrystanLea I am trying to install the demand shaper module but my attempt at cloning throws an error. git clone https://github.com/emoncms/demandshaper.git Cloning into 'demandshaper'... fatal: unable to access 'https://github.com/emoncms/demandshaper.git/': Could not resolve host: github.com…

Hello Ian, sounds like your pi cant resolve the address, a DNS cache issue… Perhaps try rebooting the pi?

No luck with reboot. This is a Pi with emonSD-30Oct18 image. I cloned to another Pi with no problem and then copied across.

Not 100% relevant to today’s issue but over 20 years ago we used to do this with a UNIX MIPS Box for British Rail Intercity for the billing of power for the Overhead Line Electrification. During some hours of the night we got paid to use energy but the bills still ran into the millions of pounds …

Hi @TrystanLea I have just set up 2 smartplugs using wemos ESP’s as I cannot compile for the actual sonoff plugs at present. I hard coded the port and node numbers. The installation took a couple of minutes per plug (dummy plug) and they both came up as AP points instantly. I was able to setup MQ…

Thanks @ian that’s great to hear, thank you for persisting! That’s a nice idea to be able to create a virtual smartplug for integration with Node-Red, I will keep that in mind. If you get a chance to document your button pushers for the appliances that would be really interesting.

Hey @ian did you ever manage to come up with a method for this? I’m just starting down the same path now. :smile:

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Is this possible? Tracking cost of electricity that is charged on 1/2 hour variable tariff

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