read and write inputs of heatpump

[beSt0815]

To control the heatpumps functions (e.g. Block electrical heater, block DHW, only cooling with PV power...) it would be nice to set the inputs via EMS.
I logged the traffic and switched them by using a wire:

i3 on:
Boiler(0x08) -> All(0x00), ?(0x04A2), data: 02 01 01 00 01 00
i3 off:
Boiler(0x08) -> All(0x00), ?(0x04A2), data: 02 01 01 00 00 00

i2 and i3 off: Boiler(0x08) -> All(0x00), ?(0x0488), data: 08 00 00 00 00 00 02 00
i2 on, i3 off: Boiler(0x08) -> All(0x00), ?(0x0488), data: 08 40 00 00 00 00 02 00
i2 off, i3 on: Boiler(0x08) -> All(0x00), ?(0x0488), data: A8 40 00 00 00 00 02 00

I didn't find a telegram for I1 and I4 at 0x0488 or 0x04A2.

I changed logic in my Controller for input 4 from high to low and vice versa:

Logic of input 4 set to low (means true)

Thermostat(0x10) -> Boiler(0x08), ?(0x0486), data: 01 (offset 42)
Boiler(0x08) -> All(0x00), ?(0x0486), data: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Boiler(0x08) -> All(0x00), ?(0x0486), data: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 01 00 00 00 00 00 (offset 25)
Boiler(0x08) -> All(0x00), ?(0x0486), data: 00 00 (offset 51)

Logic of input 4 set to high (means false)

Thermostat(0x10) -> Boiler(0x08), ?(0x0486), data: 00 (offset 42)
Boiler(0x08) -> All(0x00), ?(0x0486), data: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Boiler(0x08) -> All(0x00), ?(0x0486), data: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 (offset 25)
Boiler(0x08) -> All(0x00), ?(0x0486), data: 00 00 (offset 51)

By changing logic in the controller you don't need to open the HP and connect wires.
You can change from high to low logic, so its inverted.

I think you cannot set the inputs via EMS but you can change the logic.
I didn't find a telegram for input 1 yet.

Inputs 1-3:

Input 4:

Changing logic in controller:

Thank you!

[MichaelDvP]

0x4A2 looks like status of the inputs, You should check if the other bytes represents the status of all inputs, please check by toggeling or inverting each input and watch 04a2.
0x488 looks like bitfields, but i think not the input state, but a reaction of the inputs, maybe the block states.
0x486 is really long, i expect that there are also the configs of all inputs. Watch this telegram and toggle the settings for logic level, and each blocking mode for each input, to get the positions.
Are the options for each input identical?

[beSt0815]

Ok, I do.
Yes, options are identical.

[beSt0815]

I deactivated all actions for inputs in the HP. Set the logic to high and tested all inputs.
The only input witch generates a single telegram is input 1:

On:	Boiler(0x08) -> All(0x00), ?(0x04A2), data: 00 01 01 00 00 00
Off:	Boiler(0x08) -> All(0x00), ?(0x04A2), data: 02 01 01 00 00 00

Seems that the telegrams are for the actions e.g. block DHW, block cooling ... except input 1.

Not that easy as it seems to be.

[mvjt]

I deactivated all actions for inputs in the HP. Set the logic to high and tested all inputs. The only input witch generates a single telegram is input 1:

On:	Boiler(0x08) -> All(0x00), ?(0x04A2), data: 00 01 01 00 00 00
Off:	Boiler(0x08) -> All(0x00), ?(0x04A2), data: 02 01 01 00 00 00

Seems that the telegrams are for the actions e.g. block DHW, block cooling ... except input 1.

Not that easy as it seems to be.

Hi, thanks for your time and help. I'm a noob but I was wondering if you have a function configured for the inputs when you trigger them? On the screenshot above they are all off (aus)...Maybe it sends something if you assign blocking Warmwasser to the inputs?

The competitor gateway, only allows triggering EXT1 and EXT2 software wise so there might be e limitation for EXT3 and above...

If you want, use "watch on" and toggle Input 1 back and forth and I can also try to find the needle in the haystack...

[beSt0815]

There are 10 functions in total.

I tried a few but 100 combinations (10^2 ) in total for each input is a lot.
The telegrams for ext1 without function are above. @MichaelDvP ist that enough to try it at least for this input?

I ordered a 4ch relais module an I will connect it to my smart home system. It allows me to debug from my computer.
A binary input gives me the status of my electrical heater.

[MichaelDvP]

I tried a few but 100 combinations (10^2 ) in total for each input is a lot.

You don't need to try any combination. Just each of the single settings for one input and one setting for each inputs.
I think the settings are all in 0x486, we know only input 4 logic as offset 42 and 10 options per input.
Try to set the logic level for first input and read 0x486 and 0x4A2 (this coud be state of input), set the level back and set level of next input.
Next choose one input and set first option, read 0x486, reset first option and set second, and so on. I think each option is a sngle offset in 0x486, but we need to know the order of options and of inputs. Bosch not always orders the telegrams/offsets in the way they are numbered in manual 1-2-3-4, it could also be 3-2-4-1 or something different.

If we implement the inputs with each setting we have 48 new entities, blowing the mqtt and webpage buffers. Any idea how to reduce this? Could we make two entities per input as: in1state: on/off and in1option: 00000000000 with options as string with a 0/1 for each option?

[proddy]

is it more important to show these settings in EMS-ESP or be able to modify them? And how often? And via the web, API or MQTT? If we know what the usage patterns will be like it will help define the best way to implement it. For example if its a one-off then we could consider a setting in the web where when you 'change value' you upload a file with the new settings.

[bbqkees]

I think the most useful use case is that once you set the parameters via the control panel, you can use EMS-ESP to set these relays to on of off.
For instance if you have selected one contact for PV, you can use this to signal the heat pump to heat up the boiler from HA when the PV system has enough generated solar power.
Or you can block the auxiliary heating element from operating at times when electricity is too expensive.

[mvjt]

I think the most useful use case is that once you set the parameters via the control panel, you can use EMS-ESP to set these relays to on of off.
For instance if you have selected one contact for PV, you can use this to signal the heat pump to heat up the boiler from HA when the PV system has enough generated solar power.
Or you can block the auxiliary heating element from operating at times when electricity is too expensive.

+1

[MichaelDvP]

I think the most useful use case is that once you set the parameters via the control panel, you can use EMS-ESP to set these relays to on of off.

I think you don't need a relais if you can switch the logic. Keep input as it is and change the logic will set/clear the input.

The question is about setting all other parameters. Publish/set all as single entitity in mqtt will blow the buffer.

This discussion was also for switchtimes in program and holiday-modes. These are also settings made not often and normaly dont change. We dont have a solution for this yet.

For a quick implementation my suggestion is to publish 4 states (on(off, probably from 0x4A2) and 4 options as string 00000000000 with one char per option from 0x486. Sending a string to the option command will change all settings, sending only a bool/single character only change the logic level. But still we need the offset posiition of the single settings.

[proddy]

For a quick implementation my suggestion is to publish 4 states (on(off, probably from 0x4A2) and 4 options as string 00000000000 with one char per option from 0x486. Sending a string to the option command will change all settings, sending only a bool/single character only change the logic level. But still we need the offset posiition of the single settings.

I think this is best working solution for now.

[MichaelDvP]

I've prepared a test-build with this logic, only need to insert the right offset positions of the parameters.

[mvjt]

Would be awesome if we could get all the details needed to close this one...

[Cali1205]

Hi all,
I just stumbeled over this discussion because I'm also working on optimizing my heatpump related to the production of my PV system.
So I did the work to find out the offsets of the register 0x486. There are also some Offset values where I cannot see any impact.

Description	Offset
Input High/Low I1	0
Input High/Low I2	1
Input High/Low I3	2
EVU 1 - I1	3
EVU 1 - I2	4
EVU 1 - I3	5
EVU 2 - I1	6
EVU 2 - I2	7
EVU 2 - I3	8
EVU 3 - I1	9
EVU 3 - I2	10
EVU 3 - I3	11
Compressor block - I1	12
Compressor block - I2	13
Compressor block - I3	14
aux. Heater block - I1	15
aux. Heater block - I2	16
aux. Heater block - I3	17
Cooling block - I1	18
Cooling block - I2	19
Cooling block - I3	20
Heating block - I1	21
Heating block - I2	22
Heating block - I3	23
Hot water block - I1	24
Hot water block - I2	25
Hot water block - I3	26
PV - I1	39
PV - I2	40
PV - I3	41
Input High/Low I4	42
Compressor block - I4	43
aux. Heater block - I4	44
Cooling block - I4	45
Heating block - I4	46
Hot water block - I4	47
PV - I4	52

[MichaelDvP]

Wow, great!
Nasty that I4 follows a different logic, but we know this from Bosch.
Have you also tried to find the input state if you switch an input or invert it's logiic.
I'll implement a setting strng for each input as mentioned before as 0/1 for each setting. 0000000000 for I1-I3,
Sending a single 0/1 char inverts, otherwise need to send all settings.
Should we make I4 only 7 bytes long, or also 10 bytes and ignore EVU positions?

[masterx1981]

okay thanks, my setup is a bit easier. Its just a Buderus heatpump, which has replaced the gas heating. the only question i have is: do i need to connect the SG input or can i set or force this state in ESP? if yes, what i have to do to say: hey heatpump, there is enough power coming from the pv, overload the thermal storage

With the sg input you can also increase the target temperature of the dhw. For increasing the target temperature in house, i've preferred changing the target temperature on the thermostat (a tc100 with some smart trv valves). All depend on your setup.
In any case, seem that isn't necessary to phisically switch the I4 input of the HMC310, as the ems-esp32 can simulate this by "attaching" and "deattaching" the pv function from the phisical input, for the internal functions of the heat pump, this has the same effect of changing the input state. I still need to test this, but from what i've seen in some fast tests, it seem to work - need to test a bit more.

[masterx1981]

Hi!
I have an update on this topic. Today i've played a bit with the heat pump. I'm able to enable from ha the fv bit on the input4options.
I'm usig this script to "attach" or "detach" the fv function, using the "text: set value" service
For enable:
service: text.set_value target: entity_id: text.name_of_your_emsesp_boiler_hpin4opt data: value: >- {{states('text.name_of_your_emsesp_boiler_hpin4opt')[:6]}}1{{states('text.name_of_your_emsesp_boiler_hpin4opt')[7:]}}
For disable:
service: text.set_value target: entity_id: text.name_of_your_emsesp_boiler_hpin4opt data: value: >- {{states('text.name_of_your_emsesp_boiler_hpin4opt')[:6]}}0{{states('text.name_of_your_emsesp_boiler_hpin4opt')[7:]}}
Please replace the "name_of_your_emsesp" text with the actual name of your ems esp device.

Then I've set the heat pump in hybrid mode (as i've an hybrid setup, with also batteries attached to the fv system), so that it choose automatically if is best to use the gas burner or the hp, based on a energy/cost ratio set on an specific menu (available on ems esp at the number.name_of_your_emsesp_thermostat_energycostratio. I think that choose hp or gas based on an temperature vs efficiency table set on the heatpump). At first all was working flawlessly, the heat pump kept running. But suddenly it switched on the gas burner and i'm not able to tell why. I tought that the fv setting on the heat pump had to block the use of the heat pump despite the energy/cost ratio (why use gas if there is free electric energy?)

I'm sure that now it's a problem on how my heat pump is set, but i can't figure how to force it to use the heat pump when the fv input is set. I'll need to do more tests, but for sure the ems esp, also if it can't change the phisical input of the input 4 state, can attach and detach the pv function to the input, and playing with the "active on" flag, it can trigger the pv system.

I'm also interested on what difference there is from the pv system that we can attach at the input 4, and the smart grid functions available on the menu... But also this question is offtopic and related to the heat pump...

[RosemannBluro]

Thanks for your update. Today i received the EMS-ESP Gateway E32 V2 and got it work with my heatpump. all the sensors are in home assistant. Next step is to use PV surplus to set the SG Ready. I understood, that i can enable and disable the hpin4opt with your code to trigger the sg ready. Why it has to be input 4 and not input 1? And most importend. Where do i configure, what the heat pump has to do, if the input is enabled? for example overheating the puffer or hot water?

[bbqkees]

input 1 and 2 have another default function to block the pump.
It all depends a bit on the brand and model of the heat pump and controller.
If you go through the HMC300 manual you can see several available functions that can be mapped to input 3 and 4, in particular Smart Grid and PV. In that menu you can also set which action the pump needs to take if the input is activated.
https://www.meinhausshop.de/media/pdf/meinhausshop-6720821143.pdf

[RosemannBluro]

input 1 and 2 have another default function to block the pump. It all depends a bit on the brand and model of the heat pump and controller. If you go through the HMC300 manual you can see several available functions that can be mapped to input 3 and 4, in particular Smart Grid and PV. In that menu you can also set which action the pump needs to take if the input is activated. https://www.meinhausshop.de/media/pdf/meinhausshop-6720821143.pdf

i understand the manual, that i can confgiure solar / photovoltaik to input 1,2,3 or 4
parts of the service menu is not available for example about photovoltaik, because the heat pump is missing this part in the installation. is there any trick to have the heat pump think there is a solar system, so that i can configure these behaviors?

[masterx1981]

My wpls 8.2 + hmc310, have only input 1 (used for the thermostats, on-off communication) and input 4 (that i want to use for "lock" the use of the compressor when i have battery.
For increase the target temperature in the house (when there is an excess of solar power) i manipulate the thermostats.
For increase the acs, i use the ems esp, changing the target temperature.
For who have the thermostats not communicating with the heat pump, i think that is the best setup.

[RosemannBluro]

Hi! I have an update on this topic. Today i've played a bit with the heat pump. I'm able to enable from ha the fv bit on the input4options. I'm usig this script to "attach" or "detach" the fv function, using the "text: set value" service For enable: service: text.set_value target: entity_id: text.name_of_your_emsesp_boiler_hpin4opt data: value: >- {{states('text.name_of_your_emsesp_boiler_hpin4opt')[:6]}}1{{states('text.name_of_your_emsesp_boiler_hpin4opt')[7:]}} For disable: service: text.set_value target: entity_id: text.name_of_your_emsesp_boiler_hpin4opt data: value: >- {{states('text.name_of_your_emsesp_boiler_hpin4opt')[:6]}}0{{states('text.name_of_your_emsesp_boiler_hpin4opt')[7:]}} Please replace the "name_of_your_emsesp" text with the actual name of your ems esp device.

Then I've set the heat pump in hybrid mode (as i've an hybrid setup, with also batteries attached to the fv system), so that it choose automatically if is best to use the gas burner or the hp, based on a energy/cost ratio set on an specific menu (available on ems esp at the number.name_of_your_emsesp_thermostat_energycostratio. I think that choose hp or gas based on an temperature vs efficiency table set on the heatpump). At first all was working flawlessly, the heat pump kept running. But suddenly it switched on the gas burner and i'm not able to tell why. I tought that the fv setting on the heat pump had to block the use of the heat pump despite the energy/cost ratio (why use gas if there is free electric energy?)

I'm sure that now it's a problem on how my heat pump is set, but i can't figure how to force it to use the heat pump when the fv input is set. I'll need to do more tests, but for sure the ems esp, also if it can't change the phisical input of the input 4 state, can attach and detach the pv function to the input, and playing with the "active on" flag, it can trigger the pv system.

I'm also interested on what difference there is from the pv system that we can attach at the input 4, and the smart grid functions available on the menu... But also this question is offtopic and related to the heat pump...

sorry i dont get it. i have been in the service menu of my heat pump and activated photovoltaik under external input 4. Ater that i found a new menu about photovoltaik and what should to in this mode.

After this changes the input4 value became 000000100000. With your homeassistant code i can switch this value between 000000100000 and 000000000000 but i dont think the heat pump care about this value. There is no changed action or values. Do i miss something?

[masterx1981]

You need to watch the logic of your i4 input. The input must be always physically turned "ON" (for example: contact phisically closed and logic set to be active when the contact is closed). The hpin4opt registry set via home assistant "attach" and "detach" the pv function to the already enabled input.

[RosemannBluro]

oh i thought there is no need for a physically switch, is there any chance to trigger this mode logically?

[masterx1981]

You don't have to physically change the switch.
The switch must physically ALWAYS be ACTIVE, the automation enable and disable the PV function, with the result of triggering or not the PV system. All done in software.

[RosemannBluro]

okay i understand, but if i manage to set the switch always on for example with a shelly, i could also change this one to enable it

[masterx1981]

From what i know, is possibile to connect a relay to the gateway. It's an "unsupported thing", but with some low power relays i think that it's possible (see for example the omron G5V2 H1, 12.5ma at 12v). But i not see the point.
You can attach and detach all the features of I4, like lock the use of the compressor, enable PV, via SW change the temperature of the HMC*** thermostat of the heat pump (if present), etc.
You add an unnecessary mechanical device when you can do it all in software (less failure points)

[RosemannBluro]

For anybody in my situation: You dont even need to attach a physical switch.
In the system menu you can configure, that the input 4 is on IF switch is high or low. I changed it to low / off, so that the logic is active without closed circle. The binary value of my input4 became 100000000000.
With the code of @masterx1981 the six bit indicates now the PV surplus mode wit 1 or 0 and my heat pump started to heat hot water or increased the target temperature

[masterx1981]

Yes, is quoted several times in this topic that is possible to change the logic of activation.
Nice that it works 👍

[proddy]

I think this warrants a nice Wiki article for others to learn from. I'll close this issue and move to the discussions section for further reference.

[proddy]

There's also an idea to make it simpler by adding a feature into EMS-ESP's WebUI to configure this. #1720. But we're not sure its useful or worth the effort to implement. What do people think?

[popopirat]

Great idea, I currently have ems-esp+ a relay board and this feature would get me rid of one device 👍

[bbqkees]

@popopirat Well it already works if you send the right commands to the heat pump.
See: #1600 (comment)

But for convenience we could move the logic into EMS-ESP in the future so you don't need a script in HA.

[masterx1981]

I have only one doubt. I think that changing the setting, will result in a write of the flash memory on the heat pump. Can't be this dangerous, if done too frequently?