22F1: Ventilation unit command

These packages seemingly trigger from pressing buttons on a Itho Daalderop ventilation box (identified by 10E0 as CVE-RF which matches the model name) remote control unit. The 404 command seems to correspond to pressing "high fan", 304 "medium", and 204 "low/auto".

It seeems to be using sequence numbers and sending each command three times with 0.1s intervals. The 'sending three times' is something I have seen in other (433 Mhz based) systems too as basic 'error correction'. Perhaps the receiving end used the sequence number to match incoming message groups? Or it's just there for no apparent reason.

The packet only specfies a "receiver" and not a "sender", but this may be explainable as the remote control cannot receive anything back. The remote control is paired to the ventilation unit, so it makes sense that the remote control "knows" that 31:086097 is the target device.

Note, it could also be the case that this is the response message from the ventilation unit rather than the request message from the remote control...

-- Press "high" button... 
2024-03-14T13:27:42.418566 059  I 060 --:------ --:------ 31:086097 22F1 003 000404
2024-03-14T13:27:42.518425 059  I 060 --:------ --:------ 31:086097 22F1 003 000404
2024-03-14T13:27:42.618504 059  I 060 --:------ --:------ 31:086097 22F1 003 000404
-- Press "medium" button... 
2024-03-14T13:27:46.274514 059  I 061 --:------ --:------ 31:086097 22F1 003 000304
2024-03-14T13:27:46.374503 060  I 061 --:------ --:------ 31:086097 22F1 003 000304
2024-03-14T13:27:46.474503 059  I 061 --:------ --:------ 31:086097 22F1 003 000304
-- Press "low/auto" button... 
2024-03-14T13:27:51.795511 059  I 062 --:------ --:------ 31:086097 22F1 003 000204
2024-03-14T13:27:51.895526 059  I 062 --:------ --:------ 31:086097 22F1 003 000204
2024-03-14T13:27:51.995512 058  I 062 --:------ --:------ 31:086097 22F1 003 000204

-- same sequence again for confirmation
2024-03-14T13:29:26.935447 060  I 063 --:------ --:------ 31:086097 22F1 003 000404
2024-03-14T13:29:27.034542 059  I 063 --:------ --:------ 31:086097 22F1 003 000404
2024-03-14T13:29:27.134566 059  I 063 --:------ --:------ 31:086097 22F1 003 000404

2024-03-14T13:29:33.677537 060  I 064 --:------ --:------ 31:086097 22F1 003 000304
2024-03-14T13:29:33.776543 059  I 064 --:------ --:------ 31:086097 22F1 003 000304
2024-03-14T13:29:33.876522 060  I 064 --:------ --:------ 31:086097 22F1 003 000304

2024-03-14T13:29:39.852641 059  I 065 --:------ --:------ 31:086097 22F1 003 000204
2024-03-14T13:29:39.954758 059  I 065 --:------ --:------ 31:086097 22F1 003 000204
2024-03-14T13:29:40.051521 059  I 065 --:------ --:------ 31:086097 22F1 003 000204