868 MHz (or 433) is preferable to 2.4 GHz because the in-building performance is better for the same power. For HA applications the reduced bandwidth and duty cycle restrictions of the sub-GHz bands should not pose a problem. Nordic semi do have sub-GHz radios as well, though, if you can find a module.<br />
<br />
Mike<br />
<p>----------------original message----------------- <br />
From: "Paul Smith" <paul.smith@ptu.biz> <br />
To: "Closed list for developer discussions" <opentrv-dev@lists.opentrv.org.uk> <br />
Date: Wed, 10 Apr 2013 11:20:47 +0100 <br />
----------------------------------------------------------</p>
<blockquote type="cite"><br />
<div>Hi Gyus
<div> </div>
<div>Have you seen these radios as an alternative to the EOL rfm23b</div>
<div> </div>
<div><a href="http://gizmosnack.blogspot.se/2013/04/tutorial-nrf24l01-and-avr.html">http://gizmosnack.blogspot.se/2013/04/tutorial-nrf24l01-and-avr.html</a></div>
<div> </div>
<div>Do they sound any good for opentrv.</div>
<div> </div>
<div>Regards</div>
<div> </div>
<div>Paul</div>
<div> </div>
</div>
<div><br />
<br />
<div>On 6 April 2013 21:23, Mike Stirling <span><<a href="mailto:mail@mikestirling.co.uk" target="_blank">mail@mikestirling.co.uk</a>></span> wrote:<br />
<blockquote class="gmail_quote" style="1ex">
<div>
<div>I would have said TME in Europe (<a href="http://www.tme.eu" target="_blank">www.tme.eu</a>), but their stocks appear to be dwindling already. Don't worry about it too much, though. There are other modules which, while not as cheap, would still be suitable. I also haven't ruled out doing my own module based on the newer SiLabs transceiver chip or the TI CC1101.<span class="HOEnZb"><font color="#888888"><br />
<br />
Mike</font></span>
<div>
<div><br />
<br />
On 06/04/13 20:47, Paul Smith wrote:</div>
</div>
</div>
<div>
<div><blockquote type="cite">
<p>Hi Mike,</p>
<p>That's great. I know the rfm23b is going eol. I'm thinking I should order enough now to complete my project.</p>
<p>Where would you suggest is best.</p>
<p>Regards,</p>
<p>Paul</p>
<p>-- <br />
Paul Smith</p>
<p>Your Local Computer Specialist, Supporting Your Business When You Need It Most</p>
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<div>On 6 Apr 2013 18:04, "Mike Stirling" <<a href="mailto:mail@mikestirling.co.uk" target="_blank">mail@mikestirling.co.uk</a>> wrote:<br />
<blockquote class="gmail_quote" style="1ex"> Hi Paul,<br />
<br />
Yes I am doing custom code for that, and it seems likely that it will form the basis for the AVR branch of OpenTRV. The mods I have done are to add an RFM23B and to break out the programming pins to an external header. These are currently just wire-mods, but I am considering whether there is any scope for fitting headers that would plug in to a small custom board, which would make assembly easier. I'll be writing all this up online soon and publishing the code, but I wanted to make some actual progress first.<br />
<br />
Any AVR programmer will do, but I would recommend the Atmel one, which is the one you linked to. Probably easier getting it from Farnell or RS.<br />
<br />
I'll keep you posted on the RPi board. Still waiting for the blank boards to come back.<br />
<br />
Mike<br />
<br />
On 06/04/13 13:41, Paul Smith wrote:<br />
<blockquote class="gmail_quote" style="1ex"> Hi Mike,<br />
<br />
After the opentrv chat/google hangout last thrusday.<br />
<br />
I've ordered 5 of the Comet Sparmatic TRV's they came with better WAF which is always important. I understand that you are building new code for the device.<br />
<br />
What else would i need to get me going. I have a Rpi so believe that you have built a radio board for it. Which i would like to buy. I also know that you have add a radio module to the commet. Is this a rfm23b<br />
<br />
I think i need something like this <a href="http://store.atmel.com/PartDetail.aspx?q=p:10500054#tc:description" target="_blank">http://store.atmel.com/PartDetail.aspx?q=p:10500054#tc:description</a> can you point me in the right direction.<br />
<br />
Thanks in advance for your help.<br />
<br />
Regards<br />
<br />
Paul<br />
<br />
<br />
</blockquote> <br />
</blockquote></div>
</blockquote> </div>
</div>
</div>
</blockquote></div>
<br />
<br />
<div> </div>
-- <br />
Paul Smith<br />
<br />
Your Local Computer Specialist, Supporting Your Business When You Need It Most<br />
<br />
We also now do Portable Appliance Testing, if you would like to know more please drop us a line.<br />
<br />
Tel:- 0845 009 6226 <br />
<br />
This email and any attachments may be confidential and/or privileged. Everything is intended for use of the addressee only. If you receive this message in error then you must not print it or pass it on to anyone else or use the information it contains. Please inform Phoenix Technology UK of the error by email or by telephoning (+44)(0)845 009 6226. Please then delete all copies from your system.<br />
If you are not the intended recipient then you must not use the information in the message or attachments or allow anyone else to do so.</div>
<hr />
<br />
<pre>
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</blockquote><br /><hr style="border:dotted 1px silver; width:90%; border:dotted 1px silver;"><p> </p>