[OpenTRV-dev] EU radio band 48

[Kevin Wood]

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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