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<div class="moz-cite-prefix">Hi Bo,<br>
<br>
The MAC layer (LoRAWAN), which I think Jeremy is referring to, is
a public spec, but the underlying modulation is not. You can
therefore currently only implement a LoRA system using one of
Semtech's radios or a module based on their IP (e.g. Microchip).
The modulation is some sort of chirp spread spectrum system so is
non-trivial to reverse engineer, but efforts are ongoing in the
community. Once that happens it would be possible to implement
the physical layer in a software radio if that's what you want.<br>
<br>
Note that you can use a LoRA radio without the LoRAWAN MAC (as the
HAB guys currently do). In this case it just becomes a
proprietary data pipe like the RFM22B or RFM12, but with longer
range.<br>
<br>
Mike<br>
<br>
On 29/12/15 10:03, Jeremy Poulter wrote:<br>
</div>
<blockquote
cite="mid:CANy6aFTkExcFNAnd4=TesqrgZdV9o+3hxqRfiYBZ9PxXws6j2A@mail.gmail.com"
type="cite">
<div dir="ltr">From what I understand there is a component that is
signed and you can not change it but I believe the source will
be available at some point. This is the component that deals
with the time slicing and transmitting so you can not send more
than you are supposed to.
<div><br>
</div>
<div>Jeremy</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On 28 December 2015 at 13:37, Bo
Herrmannsen <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:bo.herrmannsen@gmail.com" target="_blank">bo.herrmannsen@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hi
<div><br>
</div>
<div>on the topic of using LoRa i have been told that
parts of it are closed source in the way that you send
data off by AT commands and then "magic" happens</div>
<div><br>
</div>
<div>Have i been told wrong?</div>
</div>
<br>
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