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emsesp / EMS-ESP

ESP8266 firmware to read and control EMS and Heatronic compatible equipment such as boilers, thermostats, solar modules, and heat pumps
https://emsesp.github.io/docs
GNU Lesser General Public License v3.0
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boiler flowtemp and boiler wwtemp can't be set at Junkers Cerapur ZSB 24-5 C 23 #313

Closed grappa24 closed 4 years ago

grappa24 commented 4 years ago

flowtemp and wwtemp seem to be determined by boiler control and can't be overridden via ems. The commands are accepted, values were set for 1-2 sec but then the original hardware settings are recovered.

wwtemp is determined by a boiler control: wwtemp

flowtemp seems to be determined by the "heating curve parameters" ...

here my info log from telnet: telnet log ems-esp - info.log

not really an issue for me, but I wan't to understand if its a bug or a feature :-)

regards grappa24 (Dieter)

grappa24 commented 4 years ago

forgot the log of "boiler flowtemp xx": boiler flowtemp 66.log

proddy commented 4 years ago

So there must be a manual override switch somewhere for that type of boiler. If you manually change the flowtemp can you sniff what telegrams are being sent? Then it's just a case of reverse engineering and mimicking that behavior.

grappa24 commented 4 years ago

just changed the flowtemp first to 56 and then to 55 at teh boiler; as I see it there are telegrams in line 49-51 and 86-88 of the log:

(03:10:15.285) Controller -> UBAMaster, type 0x33, telegram: 89 08 33 01 FF (CRC=29) #data=1 (03:10:15.310) Controller -> UBAMaster, type 0x33, telegram: 89 08 33 09 00 (CRC=C6) #data=1 (03:10:15.335) Controller -> UBAMaster, type 0x33, telegram: 89 08 33 02 38 (CRC=E8) #data=1

(03:10:40.609) Controller -> UBAMaster, type 0x33, telegram: 89 08 33 01 FF (CRC=29) #data=1 (03:10:40.634) Controller -> UBAMaster, type 0x33, telegram: 89 08 33 09 00 (CRC=C6) #data=1 (03:10:40.659) Controller -> UBAMaster, type 0x33, telegram: 89 08 33 02 37 (CRC=E7) #data=1 telnet log set wwtemp.log or do you need a raw log?

bbqkees commented 4 years ago

So its likely a 'feature' because of the manual control knobs.

proddy commented 4 years ago

@grappa24 it looks like you're changing the boilers DHW (Hot Water) temperature and not the flow temperature. Really depends on what you're trying to do. If you want to mimic that warm water manual dial then use boiler wwtemp. This is the 0x33 telegram examples you posted above.

grappa24 commented 4 years ago

@proddy you are right. I tried to change the boilers DHW, but even with boiler wwtemp it does not work. But it's o.k. for me since I understand why (as bbqkees said ... manual control knobs). Same with flowtemp; flowtemp is the product of a "complex" algorith (e.g. dependant of outside temp, ... ) and it makes no sense to set it directly. I use setting thermostat temperature instead. So feel free to close this issue -:)

proddy commented 4 years ago

ok, at least now we're all wiser! thanks for using the software and providing feedback.