Engelmann Sensostar Heat Meter Integration with ESPHome

Did the module work with the firmware it came with?
Before shipping I tested all modules with an Sensostar E.

Dirk

Hello Dirk,

As described in my last post, I compiled the firmware myself using yaml. To test everything, I would ask you to send me your compiled firmware. I can only imagine that the pins for the UART are incorrect.

uart:
  - id: uart_mbus
    tx_pin: GPIO6
    rx_pin: GPIO7

Regards,
Michael

Hello Dirk,
I installed your adapter in my new sensostar device and I can see with mqtt values in my fhem system. But I only see values of the esp32 device. I use mqtt without user and password. The sensostar is ready to install but it shows a H10 error, because no water in the pipeline. Is there anything to do to get the values, for example the temperature? On the ESP Website of the adapter I see the temperatur. Will the data come when the device ist installed in the heating?

Regards

Andy

I have a sensostar U. As long as there is no water detected you’ll see no updates on the sensor values.

Dirk

Hi Dirk,

Sensostar U is also available with option to meassure heating&cooling. The telegram protocol also describes that heating & cooling data are part of the data stream. Is this also supported by your device?

I saw some discussions to order a new Sensostar and ask the reseller to do some parameter settings. Are these parameters relevant to your device too or are these only relevant for Engelmann wireless M-bus cards?

This ESPhome project already exposes a calculated power value, which can also turn negative, e.g. in case of deicing. Yesterday I added another parameter, which integrates the negative power values over time to calculate the deicing energy and exposes this to HA. It seems to work fine so far. I get ~0.7kWh thermal energy per deicing. You can find the fork: GitHub - olebowle/esphome-sensostar: Custom ESPHome component use with SensoStar module (see last commit).


@brambo123 I’ve also thought about a more compact version, as I have issues make it stick in the overhead mounting position I have for one of the meters. Nice to see it is already available. I’ll like to order probably end of the week. Have you already ordered some and know it works, or would this be a beta test?
Anyway, should I order some additional ones, splitting shipping cost etc.?

What means more compact version? The PCB neeeds to connect to the internal connector of the heat meter.

Regards,

Dirk

Sure it does. But the version linked by @brambo123 uses a smaller ESP module thus reducing size and weight. I’d also be willing to create a version with further reduced size for my use case that I’d share openly. Would it be possible to get the KiCad sources @brambo123?