[Solved] Offline electric heating automation using the G12W tariff

Hi all
I would like to build a simple automation to control the heating with electric radiators, 2kW each (3 radiators).
In addition to the typical daily schedule, ie.
23:00 - 05:00 not less than 18 degrees
05:00 - 07:00 not less than 20 degrees
07:00 - 16:00 not less than 18 degrees
16:00 - 23:00 not less than 20 degrees
I would like to use cheap energy in the G12W tariff to additionally heat the flat in the cheap electricity zone (14:00 - 15:00 and 05:00 - 06:00), but so as not to exceed 22 degrees

The whole thing should work offline, online access is an optional benefit.

I have some Sonoff POW relays left over from an old unrealized project but I don't know if they will be suitable for my applications, because if I have seen correctly, they work with the Sonoff cloud and are controlled by the eWeLink app?
If so, the heaters themselves also have a manual thermostat.

Any ideas on which home automation system would be easiest to base this on?

Greetings!

hindoos wrote:

Any ideas on which home automation system would be easiest to base this on?

Depends on what you find easiest
One suggestion could be e.g. a Sonoff Basic R2 (wifi) with preloaded tasmot and attached DS18B20 temperature sensor.
You program via a browser on the wifi home network. The relay contacts in it (the sonoff) are not too strong, so it is enough that it controls a contactor and this will switch the power supply to the radiators.

Take a look at this:
Link

The E4040Smart controller only works on a 2.4 GHz WiFi network, but this is not a problem.
I use the controllers but without the WiFi option and they work perfectly well, allowing rational management of electricity, which is not insignificant these days.

@Ryszard49 but I see correctly that it only controls one device? Can further receivers be added?

I have 1 controller set up for 1 room. In 3 rooms 1 radiator in 1, 2 radiators controlled from 1 controller. The controller with Wi-Fi option allows you to set the heating parameters in the rooms in real time. Unfortunately I have not had the opportunity to try out this system. It would be good if someone using this solution or similar would comment on this.
Controller operation:
Link
Just a note, You have 2kW radiators and the relay output is 5A, so you need to use another relay with a higher load capacity. In my case I did on SSRs.

Only unfortunately at my place there are 2 rooms and 3 radiators :/ and on top of that this limitation, in this respect the Sonoff with 3500W Pmax should have a power reserve for continuous operation keeping a small form factor and not requiring an additional power supply from the plug, like the Eurostar receiver.

A pity, because I had a Eurostar controller for my cooker and it worked faultlessly for several years - until I scrapped the cooker it served and sold the working controller on.

So the Sonoff remains but maybe stay with the eWeLink and integrate it with the Home Assistant?

>>20889243
Hello
I am involved in building automation. >>20889243 >>20889243 >>20889243 >>20889243 Hello
I am involved in building automation.

Added after 18 [minutes]:

>>20889243
Hello
I am involved in building automation.
I can write a program and give you a hint on what to do - but that's in a private message , so as not to litter here.