<div dir="ltr">are there not a band that is common?<div><br></div><div>ie 433 Mhz ?</div></div><div class="gmail_extra"><br><div class="gmail_quote">2016-06-08 15:12 GMT+02:00 Kevin Wood <span dir="ltr"><<a href="mailto:kevin@the-wood-family.com" target="_blank">kevin@the-wood-family.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">> btw... how are freq set on these things?<br>
<br>
By programming registers on the RFMxx module, and they have a range (on<br>
paper) of around +/-20 MHz so small changes in frequency can be<br>
accommodated in code for regional variations. Larger shifts in frequency<br>
(i.e. to the US ISM band) can't, without getting a different module.<br>
<br>
Kevin<br>
<br>
> maybe we could just program them depending on where they go?<br>
><br>
> there are 3 main options and i think one of them is us only and the other<br>
> europe only and the last one goes both places<br>
><br>
> 2016-06-08 13:58 GMT+02:00 Damon Hart-Davis <<a href="mailto:dhd@exnet.com">dhd@exnet.com</a>>:<br>
><br>
>><br>
>> > On 8 Jun 2016, at 12:56, Joseph Heenan <<a href="mailto:joseph@heenan.me.uk">joseph@heenan.me.uk</a>> wrote:<br>
>> ><br>
>> > I believe there is a version of the RFM23B with a 0.1" header fitted.<br>
>><br>
>> 2mm pitch IIRC, bah!, so I was never able to use the one I bought! %-P<br>
>><br>
>> Rgds<br>
>><br>
>> Damon<br>
>><br>
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</blockquote></div><br></div>