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3EF1: Actuator Unknown

David Bonnes edited this page Jan 21, 2020 · 1 revision

Actuator Unknown

Little is known about this payload. It is related to 3EF0.

They seem to appear periodically between 22: (or 12:) controllers that are bound to a BDR (for those systems without an Evohome controller).

Requests

In addition, BDRs and OTBs will respond to an RQ with a payload of 0000:

--- RQ --- HGI:002563 BDR:114333  --:------ 3EF1 002 0000
--- RP --- BDR:114333 HGI:002563  --:------ 3EF1 007 0000DC00DC00FF
Name BDR OTB
[0:2] domain_id always 00 always 00
[2:6] unknown_0 0001 to 02FF always 7FFF?
[6:10] unknown_1 <= unknown_0 0001 to 02FF?
[10:12] state (%?) 00 to C8 ???
[12:14] unknown_2 always FF ???

Unknown_1 often has the same value as unknown_0.

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