Mine is a water stove, and the application allows these parameters to be displayed/controlled:

• In the main screen:

• [x] In the upper left corner there is an icon indicating whether the water pump is running or not.

• [X] In the middle there is an icon indicating the current status. This is already exposed, however, I have seen the following:

  When the pellets are running out, the cooker makes a beep. However, neither the app icon nor the home assistant "action" entity change, it is kept on "heating". If the stove is switched off due to lack of pellets, then yes, the entity "action" changes to "stopping" and then to "end pellet". I don't know if it would be possible to read an extra status indicating "low pellet". But it would be a very useful feature, to be able to notify about the lack of pellets via home assistant.

• [X] Below the icon, it shows the current environment temperature, which is already exposed.

• [x] Finally, the water temperature is displayed. I guess it corresponds to the index #17 of your screenshot.

• In the status screen:

• [x] Firstly, the power at which the stove is operating. Guess it is parameter #22.

• [X] Set and Environment, already exposed.

• [x] Water temperature, the same as shown in the main screen.

• [X] Fumes temperature, already exposed.

• [X] Fumes fan speed, already exposed. As you see in the snapshot, the unit seems to be g/m and not rpm. But not sure if this is correct in the app.

• [x] Last one, air exchanger fan speed. This is not exposed and I think it must be #27, #30 or #33.

• In the control screen:

• [X] Firstly, the Eco mode, already exposed. I really don't know if it has any real effect on my stove.

• [ ] Next, the Chrono mode, not exposed. For me it is secondary, because thanks to the integration, it will be possible to schedule the stove using home assistant.

• [ ] Next, the programmed power. I don't know how it behaves because the stove adjusts this value automatically according to the temperatures. It's not exposed but I guess it is #23.

• [X] Next, the environment setpoint. Already exposed.

• [x] Last, and very important In my opinion, the air exchanger fan speed. I can change it from 0 - 5 and "Auto". I suppose it will be #28, #31 or #34.

As you can see, the app does not let you adjust the water temperature setpoint. But, according to your screenshots, I think it is possible to adjust it using parameter #18. This would be very very useful in my opinion, especially because it is not possible from the app.

I'm sorry for rambling, It is not my intention to give you so much work, only that you know which parameters are interesting in the case of water stoves.

Feel free to move this to a new issue or enhancement (or six, or seven ;) ). This is probably not the best place to discuss it.

Originally posted by @elkarto in https://github.com/benlbrm/ha-hottoh-component/issues/1#issuecomment-975950970

Hello @elkarto, In version 0.0.27, I've expose a function set_water_temperature that is setting an not documented register, can you give a try ? You can also try with constant form 12 to ??

def set_water_temperature(self, value): """Set Target Water Temperature of the stove""" try: result = self.client.sendCommand( parameters=[ str(StoveCommands.INCONNU_4.value), str(value * 10), ] ) return result except: raise

Today, when I got home, I noticed that all the home assistant devices were responding very slowly. I attempted to enter the web interface and could not access it. I managed to get into the logs through SCP, and I've seen a lot of hottohpy messages flooding the log. (6 hours at a rate of about 5 to 6 messages per second, the file was over 100MB) I was not able to copy the exact message, because the viewer crashed and I could not access it any more. I had to restart the home assistant host. But it was a connection failure and the cause of it was "broken pipe".

If I see it again I will try to copy the exact message.

Thank you for all your work, looking forward for new improvements.

Originally posted by @elkarto in https://github.com/benlbrm/hottohpy/issues/1#issuecomment-979514820

I have been doing some research looking at the communication between the wifi module and the stove.

Mi stove is an Edilkamin Blade H and the wifi module is a Wifi H (Astrel / HottoH)

It is an RS232 bus, and the used communication protocol is MODBUS RTU.

Baudrate: 19200 Data bits: 8 Parity: Even Stop bits: 1

The slave address of the stove is 0x10.

There is still a lot of work to be done. I have only been able to do some quick tests. I have only been able to identify with confidence a few register addresses, which are the ones I am listing here. I have potential candidates for other addresses but I want to be sure about it.

Well, what matters:

When you change any setting in the application, the module writes that register on the fly. There is no write polling. The records it writes are as follows:

Regarding the reading, there is a polling of the information, rather fast.

The module cyclically reads all these registers in the same order:

I have doubts about other addresses marked with ?, but I think that some of them may also correspond to:

• Water pressure
• Chamber differential pressure
• Water input temperature
• Other temperature sensing inputs, like boiler, puffer, dhw, other rooms... (reads 65101 value in my stove)

I will try to continue testing to identify more addresses

I don't know if it can be so useful for this python library, but maybe someone can find it helpful.

What seems to be clear is that the wifi module reads more data than it afterwards exposes over the network.