[OpenTRV-dev] LoRa

[Mike Stirling]

Some (e.g. daveack) have used it for tracking as an alternative to 
RTTY.  I don't think they're using it for ukhas.net, which is probably 
what James meant.

On 02/01/16 20:51, Bo Herrmannsen wrote:
> Hi mike....
>
> have been thinking... you say that the HAB guys use the LoRa radio... 
> are you sure about that? was on an IRC chat and james said that they 
> have rejected it on the grounds that its not open source
>
>
>
> 2015-12-31 11:20 GMT+01:00 Mike Stirling <mail at mikestirling.co.uk 
> <mailto:mail at mikestirling.co.uk>>:
>
>     Hi Bo,
>
>     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.
>
>     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.
>
>     Mike
>
>     On 29/12/15 10:03, Jeremy Poulter wrote:
>>     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.
>>
>>     Jeremy
>>
>>     On 28 December 2015 at 13:37, Bo Herrmannsen
>>     <bo.herrmannsen at gmail.com <mailto:bo.herrmannsen at gmail.com>> wrote:
>>
>>         Hi
>>
>>         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
>>
>>         Have i been told wrong?
>>
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>>
>>
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