Nuaire Drimaster Eco-Heat-HC & RFlink?

[gwaelod]

Anyone been able to get a Nuaire Drimaster passive ventilation unit linked to an RFlink?

I have a 433mhz link RFlink, but cant see any signals from the Drimaster remote switches to the unit, so I presume it works on 868mhz?

There's virtually no information about radio signals on manufacturers website

[DanM]

Replying after a long time.. but did you ever make progress with this? Its definately 868 - I spoke to the company about it. I was thinking of buying one of the switches and just soldering to it to send the signals..

[gwaelod]

No - not fiddled with it very much apart from pulling open the switch and noting that it looks virtually identical to the Orcon sensor in this thread

viewtopic.php?f=49&t=13713



Browsing some dutch forums the electronics superficially resemble some other dutch ventilation systems (Itho)

[gwaelod]

When you say soldering to it send signals..do you mean soldering something like an ESP8266 to it and using the outputs to drive the switches?

[zxdavb]

This RF (868 Mhz) system uses the Residential Network Protocol. This includes the Nuaire 4-way switch, and other kit.

Raw packet from humidity sensor:

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045  I --- 32:168090 --:------ 32:168090 12A0 006 003C07A8049C

Decoded packet:

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|| 045 |  I |     | 32:168090 |            | >broadcast | sensor_humidity | 006 | 003D07B304B9 ||

Decoded payload (003C07A8049C):

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{'domain': '00', 'relative_humidity': 0.61, 'temperature': 19.71, 'dewpoint': 12.09}

You could calculate a higher-precision relative humidity from the other two values using any one of the known formula.

The python code to take the raw payload and create the JSON is:

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{
    "domain": payload[:2],
    "relative_humidity": int(payload[2:4], 16) / 100,
    "temperature": int(payload[4:8], 16) / 100,
    "dewpoint": int(payload[8:12], 16) / 100,
}

[zxdavb]

If anyone has information on the residential network protocol, please PM me!