reading multiple DPs at once

[s0170071]

Just to let you know... I have been experimenting with reading past the data point length on my WO1B. Turns out you can do that for many data points resulting in a burst read of multiple points. Its a lot faster. Here are the blocks that I currently use:

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Cluster 0 — Status Signals (base 0x0400, 29 bytes, stride 1)

Address	Datapoint
0x0400	Status_Verdichter
0x0402	Status_Ventilatorstufe1
0x0404	Status_Ventilatorstufe2
0x0408	Status_Durchlauferh_Stufe1
0x0409	Status_Durchlauferh_Stufe2
0x040D	Status_Pumpe_Heizkreis_A1
0x0410	Status_Zusatzausgang_ZPumpe
0x0411	Status_Sammelmeldung
0x0414	Status_Umschaltventil_H_WW
0x0416	Status_Speicherladepumpe
0x041C	Status_HK_UmkehrCool

Cluster 1 — Temperatures (base 0x0101, 12 bytes, stride 2)

Address	Datapoint
0x0101	Aussentemperatur
0x0102	Temperatur_Verdampfer
0x0103	PrimaerkreisVLtemp_Luft
0x0104	PrimaerkreisRLtemp_Luft
0x0105	PrimaerkreisVLtemp_Wasser
0x0106	PrimaerkreisRLtemp_Wasser

Cluster 2 — Brauchwasser + Raum (base 0x010D, 20 bytes, stride 2)

Address	Datapoint
0x010D	Brauchwassertemperatur_oben
0x0116	Raumtemperatur_ist

Cluster 3A — Operating Hours (first half) (base 0x0580, 40 bytes, stride 4)

Address	Datapoint
0x0580	Betriebsstd_Verdichter
0x0582	Betriebsstd_Ventilatorstufe1
0x0584	Betriebsstd_Ventilatorstufe2
0x0588	Betriebsstd_Durchlauferh_1
0x0589	Betriebsstd_Durchlauferh_2

Cluster 3B — Operating Hours (second half) (base 0x058D, 40 bytes, stride 4)

Address	Datapoint
0x058D	Betriebsstd_Heizkreis_A1
0x058E	Betriebsstd_Z_Pumpe
0x058F	Betriebsstd_Sammelmeldung
0x0591	Stunden_Sammelmeldung
0x0594	Betriebsstd_Ventil_WW
0x0596	Betriebsstd_Speicherpumpe

Cluster 4A — Switch-on Counters (first half) (base 0x0500, 40 bytes, stride 4)

Address	Datapoint
0x0500	Einschalt_Verdichter
0x0502	Einschalt_Primaerquelle
0x0504	Einschalt_Sekundaerquelle
0x0508	Einschalt_Durchlauferh_1
0x0509	Einschalt_Durchlauferh_2

Cluster 4B — Switch-on Counters (second half) (base 0x050D, 40 bytes, stride 4)

Address	Datapoint
0x050D	Einschalt_Heizkreis_A1
0x0510	Einschalt_Z_Pumpe
0x0511	Einschalt_Sammelmeldung
0x0514	Einschalt_Ventil_WW
0x0516	Einschalt_Speicherpumpe

Cluster 5 — JAZ (base 0x1680, 3 bytes, stride 1)

Address	Datapoint
0x1680	JAZgesamt
0x1681	JAZHeizen
0x1682	JAZWW

Cluster 6 — COP (base 0x1690, 2 bytes, stride 1)

Address	Datapoint
0x1690	COPHeizen
0x1691	COPWW

Cluster 7 — Power (base 0x16A0, 20 bytes, stride 4)

Address	Datapoint
0x16A0	Heizleistung
0x16A4	Leistungsaufnahme

Cluster 8 — Weekly Energy (base 0x16D0, 8 bytes, stride 2)

Address	Datapoint
0x16D0	ElektroEnergie_WW_1W
0x16D1	ElektroEnergie_Heizen_1W
0x16D2	WaermeEnergie_WW_1W
0x16D3	WaermeEnergie_Heizen_1W

Cluster 9 — Belastung (base 0x1620, 18 bytes, stride 2)

Address	Datapoint
0x1620	Belastung_0_22K
0x1622	Belastung_22_32K
0x1624	Belastung_32_41K
0x1626	Belastung_42_50K
0x1628	Belastung_51_99K

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Addresses in the 0x6000+ and 0x1640+ ranges are excluded — block reads there return corrupt data.
Turns out you can read blocks of up to 56 bytes. After that it becomes unstable.

[bertmelis]

Of course you can. That's how the Viessmann software does it.

The downside is that you have to split and parse the data but it is a lot faster.