WH1080 - display unit <> weather station link

[JMB]

Probably an obvious question but something that I have wondered about the WH1080. Presumably if a neighbour bought a WH1080 then the display would receive data from both or is it locked to one weather station.

[harrym1byt]

My own guess, without buying two units to prove it, would be that you would receive data from either or both units assuming both were in range - I don't think there is any 'pairing' taking place as you get with bluetooth. Two wihin range of each other would be an extremely unlikely scenario I would have thought - says he who can receive six different wifi signals in his ground floor living room PC from neighbours access points.

If ever it were to happen here, I would be inclined to ask if we might be agreeable to share one of the outside sensors between two displays and share the spider eviction / maintenance.

[steve]

With the Davis stations, you can set an identifier for your sensor (using DIP switches), should this situation arise. Maybe the WH1080 has something similar? There would have to be a corresponding setting on the console, though, so I guess you'd already know if this was the case.

Steve

[harrym1byt]

I have had mine apart, no dipswitches and no pairing system in the menus. The only other ways would be a pairing on first switching it on, or some sort of fixed pairing, both of which which seem unlikely.

[Super-T]

If you look at the installation page for the 1081 then it says to turn on the transmitter first before the desktop console. I would assume the Console then queries the transmitter and sets itself to that particular transmitter. Maybe I can put a spare transmitter in the fridge and see what I get for data.

I sometimes have more than 2 of these units passing through and must try it out sometime....firstly backing up my data though

[skyewright]

If you look at the installation page for the 1081 then it says to turn on the transmitter first before the desktop console. I would assume the Console then queries the transmitter and sets itself to that particular transmitter. Maybe I can put a spare transmitter in the fridge and see what I get for data.

I only have personal experince of OS weather stations, but from what I can gather "Synching" seems to be a standard thing with 433Mhz gear of all pretty much all flavours.

My poor understanding (based on experience, rather than techncal study) is that resetting a 433Mhz transmitter (i.e. sensor) causes it to choose a new 'id' and go into a 'excited' state where it shouts its new id to the world. Synching the receiver seems to be a matter of getting it to look for transmitters that are 'excited', and note the id for on-going reference. I get the impression that with some equipment and in some cases (e.g. first use?) it may not be necessary to 'excite' the sensors.

I believe that approach allows multiple transmitters to use the same channels but be diffferentiated by id (for example I have 2 OS sensors set to channel 2 - the console sees one of them and isn't confused by the other [my RFXCOM can see and differentiate both]).

It's certainly possible to intentionally have more than one OS console receiving data from the same set of sensors - and in a densly populated area it can probabaly happen accidentally too!

[goldrush]

Just to avoid confusion, whilst what you say is correct, the Fine offset 1081 series work on the 868.3 Mhz band, not the 433Mhz band of the lacrosse etc.

[Super-T]

433MHz. in New Zealand. Frequency varies depending on local standards. I think.

I like the description of "excited transmitters"

[goldrush]

Ops.. yes sorry. Instead of "avoiding confusion" I probably added to it.
Should have said 868Mhz in N Europe... 433 or 915 is normally used in the US and other areas.
Must be the Xmas spirit... hic

It is of course possible to obtain and legally use the 433 Mhz system in the UK, but at present it does tend to suffer more than the 868Mhz band from interference.
No doubt in the not too distant future the 868Mhz band will become just as noisy after all the Xmas presents<BG>
Happy new Year

[harrym1byt]

If you look at the installation page for the 1081 then it says to turn on the transmitter first before the desktop console. I would assume the Console then queries the transmitter and sets itself to that particular transmitter.

The console cannot querie the outdoor unit, only the outdoor unit is able to transmit. If the console were able to transmit no doubt they would have it request a resend of data for those occaisional times when data is missed or arrives corrupted.

433 is heavily used in the UK for car fobs, other remote controls of various types, x10 and it is also in the middle of an amateur band.

[Super-T]

"Query" is probably better to be "Listen" to the transmitter maybe
Handshake would be nicer but not available.
It certainly is necessary to activate the Transmitter prior to the Base Station and this includes having the USB cable disconnected.