HT outdoor unit: the frames between the hydrobox and the outdoor unit. On the board on the outdoor unit (X41A), the firmware now reads in the outdoor controller's memory the frames the two boards exchange, and adds the values the registries do not give: the pump speed, the remote controller's room temperature, the inverter current, speed and fin temperature, the whole unit's input current and load, and the leaving and return water at a finer resolution. They appear in Home Assistant as "E0: ...", "63: ..." and "RAM: ..." sensors once the reader has found its unit, a few minutes after the start. It only reads, and only on the outdoor softwares it knows, DP0009 and YP0211; the log says what it found. Contributed by @selman61 (#630, #631, #634), first run on an ESP32 by @stav242 and @julianbl (#624).
CB boards of 2014-2017: targets and power limit. The hot water and leaving water targets and the power limit work on the EHVH/EHVX/EHBH/EHBX CB series, software 76F2 (these boards have no software command: it is the "I/U Software ID" of the Values page). The addresses were read back on an EHVX11S26CB9 by @MvdB1982 (#599). Same Experimental cards, same caution: the first report from a CB board is what turns the list into a confirmed one.
The unit's own energy meter. On those boards the heat produced since the installation, the number the user interface shows under energy metering, is read once a minute and published as "Unit meter: Heat produced (kWh)", a lifetime total. Other boards follow as their address is found.
Outdoor temperature on the home page. Settings → Heat pump connection chooses the outdoor temperature the home page shows: the outdoor unit's sensor, or the external sensor on the hydro board's auxiliary input (R6T), the one the unit runs its curve from when field setting [C-08] is "outdoor sensor" (#629). Keep "Auxiliary sensor (R6T) - Room / Outdoor" among the selected values.
Two zones: the piping as on the installer's diagram. The mixed zone's pump pushes its surplus through a check valve into the unit's return, downstream of the unit's own pump, as drawn with @pvodoz (#602). Card 1.0.30 draws the same.
Health: "Hot water circulation". The chip that read "Circulation" is the hot water recirculation pump (the unit's "Circulation pump operation"), not the main pump, and says so now (#632). On the Rotex, whose "Circulation pump" is the main pump, that value animates the pump drawing instead.
Energy figures: the pump between runs. The pump and electronics watts count whenever the flow shows the pump running, not only while the compressor runs, so the estimate matches a meter's reading between runs (#599). The day's energies still integrate over the runs.
German names. The hot water circulation pump is "Zirkulationspumpe" and the unit's pump "Umwälzpumpe" in every German definition (@hybe2022, #635).
Update: System → Firmware update → Check for an update, or the web installer. Card: 1.0.30 on HACS.