[OpenTRV-dev] EU radio band 48

[Bo Herrmannsen]

or sign up a chinese culi.... we dont have to pay them :-D

joke aside... my thought was to use a freq that could be used both places

if not possible then a module that comes in the freq's we need and get a
few shipped without the module and solder the us one is ourselves



2016-06-08 15:42 GMT+02:00 Kevin Wood <kevin at the-wood-family.com>:

> 433MHz is only an ITU region 1 (basically EMEA) band, I believe.
>
> There isn't one in the "hundreds of MHz" that exists both in UK/Europe and
> US. Not until you get up to 2.4 GHZ, then you're competing with wireless
> LAN, video senders, etc.
>
> There is an RFM module for 915 MHz, so, if the will was there, something
> could be done for the US with the change of one component and maybe a
> change to the programming of the frequency registers in the RFM.
>
> Kevin
>
> > 433 should be the "universal" one
> >
> > 2016-06-08 15:12 GMT+02:00 Kevin Wood <kevin at the-wood-family.com>:
> >
> >> > btw... how are freq set on these things?
> >>
> >> By programming registers on the RFMxx module, and they have a range (on
> >> paper) of around +/-20 MHz so small changes in frequency can be
> >> accommodated in code for regional variations. Larger shifts in frequency
> >> (i.e. to the US ISM band) can't, without getting a different module.
> >>
> >> Kevin
> >>
> >> > maybe we could just program them depending on where they go?
> >> >
> >> > there are 3 main options and i think one of them is us only and the
> >> other
> >> > europe only and the last one goes both places
> >> >
> >> > 2016-06-08 13:58 GMT+02:00 Damon Hart-Davis <dhd at exnet.com>:
> >> >
> >> >>
> >> >> > On 8 Jun 2016, at 12:56, Joseph Heenan <joseph at heenan.me.uk>
> wrote:
> >> >> >
> >> >> > I believe there is a version of the RFM23B with a 0.1" header
> >> fitted.
> >> >>
> >> >> 2mm pitch IIRC, bah!, so I was never able to use the one I bought!
> >> %-P
> >> >>
> >> >> Rgds
> >> >>
> >> >> Damon
> >> >>
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