Help request: register to write to set the indoor temperature on rego 1000 v3.6?

[davidbbs]

Hi -- This isn't an issue but I'm trying to contact you for a bit of help. I'm looking for the register (and format) for writing in the indoor temperature to my rego 1000 v. 3.6 to emulate the indoor CANbus thermostat. I've looked through the (extensive!) register list you have, but I'm not sure which one (and what format) handles that. Do you know? Thanks! -David

[jagheterfredrik]

It’s not a variable in the rego, it’s treated specially probably to reduce wear on non-volatile storage.

If you are using my code use the climate and set indoor_sensor like in https://github.com/jagheterfredrik/esphome-rego1000/blob/main/rego1000-1.12.1.yaml#L42

If you want to do it yourself the can id is defined here https://github.com/jagheterfredrik/esphome-rego1000/blob/main/components/rego1000/climate/rego_climate.h#L6

[davidbbs]

Thank you! I think I understand this now, but if you have a moment I would appreciate it if you could double-check my analysis:

• The indoor temperature is reported to the device by sending the temperature as a 2 byte integer scaled by 10 to can bus ID 0x10000060.
• This is different from setting register values, which is done by sending the data to a can bus ID determined by (rego_variable << 14) | 0x04003FE0.

Is that correct? Thank you!

[jagheterfredrik]

Correct!

Note! You have to set the “Knob's operating range” (sv. “Rattens arbetsområde”) to 0K in the heat pump indoor thermostat settings, otherwise the set point will be offset. This is probably because I need to send an additional CAN message about the set point but I don’t know the ID.

[davidbbs]

I don't see the Rattens arbetsområde option in my installation manual (just Kvittera rumsgivare and Rumsteperaturpåverkan). I hope that means there is no offset. :)

I'm using the device from hustdata.se, so I can't send directly to different can bus IDs, but I'll get in touch with the developer to see if it's possible to add that. Thanks again for your help!

[jagheterfredrik]

I believe you do have one: https://github.com/jagheterfredrik/esphome-rego1000/blob/main/rego1000-v3.6.0-variables.txt#L1452

Did you elevate your access before checking the menu?

[davidbbs]

I was looking in the installer manual and I checked the system in installer mode. I couldn't find it accessible from there. Hopefully it defaults to 0, though! -David

[jagheterfredrik]

On my pump it defaults to 6 unfortunately

[jagheterfredrik]

Ah, you can only see it if a indoor thermostat is installed, see page 49 https://cdn.jseducation.se/files/pages/install_he_6720643409_01.pdf

[cjonhammar]

I cant find that setting either. (in installer mode) (3.7.0) (Im using the "faked" sensor from home-assistant.)

[jagheterfredrik]

@cjonhammar interesting! iirc my heating setpoint is wrong (too low) when room set point equals room temp if that settings is not 0. You didn’t notice anything like that?

[cjonhammar]

Looked at a newer installation manual (2013): https://docplayer.se/37061145-Premiumline-hq-c4-5-c10-e6-e17-installatorshandledning.html Cant find that there either. I have set the desired room temp to 20 but the real room temp never reaches more than around 18. Maybe I should read out that value, 0x0882: ROOM_DIAL_RANGE by adding it to the "sensors"..

[jagheterfredrik]

That’d be interesting!

[jagheterfredrik]

But use a “number:”, that way you can set it as well.

[davidbbs]

Ah, you can only see it if a indoor thermostat is installed, see page 49 https://cdn.jseducation.se/files/pages/install_he_6720643409_01.pdf

Ah. I see what the difference is. I have a Swedish version which does not work that way. (IVT informed me of this and sent me the Swedish installer manual which clarifies that.) The Swedish one only supports indoor temperature via CanBus, while the manual you have lists an analog input (E11.TT.T5) for a temperature sensor. I'm guessing there is an offset register on that version to calibrate the analog sensor.

[jagheterfredrik]

My understanding is that v1.x.x supports analog sensor and v3.x.x does not. But the analog sensor does not have a knob while the canbus one does. I wonder if IVT simply removed the ability to change (such a niche feature in the first place...)

[cjonhammar]

ROOM_DIAL_RANGE is set to 1 in my 3.7.0 rego1000.

[jagheterfredrik]

Does changing it change the heating setpoint?

[cjonhammar]

if i changed it to 0 the setpoint changed +10:

[jagheterfredrik]

@cjonhammar I just pushed a fix, https://github.com/jagheterfredrik/esphome-rego1000/commit/4ec4f053025f7acbd2409112ca4a024ea914f1f9, that also sends emulates the CAN bus dial to be at the midpoint, rendering the dial range unused. Please try it out, the dial range change should not impact the heating setpoint at all.

[cjonhammar]

Same behaviour with the fix.

[jagheterfredrik]

Still +10? This was highly unexpected..

[cjonhammar]

Yes, you can see the jump on the graph.. But I saw that my "default" setting wasnt 1.0 but 0.6. (it rounded it up, since i had it to step 1 instead of .1)

[jagheterfredrik]

Ah, you need to set min: 0 max: 6 step: 1 value_factor: 1

[jagheterfredrik]

Actually, hold off on using the number: for now, there’s a bug

[jagheterfredrik]

Ok the bug was fixed. The dial range really should not matter.. I believe the IVT CAN room controller sends out the state of it's potentiometer-based dial, read by ADC to a resolution of 0-1024, 512 should be the mid point (i.e. "0"). Afaik the room controller is compatible with both versions and as such should work the same across them so it's a complete mystery why you see a change in heating setpoint when changing the dial range.

[jagheterfredrik]

@cjonhammar the bug meant you made changes/looked at ROOM_DIAL_RANGE_GLOBAL instead of ROOM_DIAL_RANGE (and is the one you were actually controlling). Add both as "numbers:" with value_factor 1, step 1 and test around. It seems your original values were ROOM_DIAL_RANGE=0 ROOM_DIAL_RANGE_GLOBAL=6 which is the same as I had.

[cjonhammar]

Ok, reverted the dial_range values to 0 and 6. But there seems to be a bug in the heating, now 20.0 shows up as 200

[jagheterfredrik]

Thanks got noticing! The bug was cosmetic and a fix is now pushed

[cjonhammar]

Sweet, thanks. (I did also notice that it was only cosmetic after running to the boiler room last night.. :) )

[jagheterfredrik]

Well @cjonhammar I think you might want to set the dial range to 0 if you want to get closer to your target temp :)