[Battlemesh] FCC Contacts about Wifi Regulations

David Lang david at lang.hm
Fri Aug 5 02:54:46 CEST 2016


On Fri, 5 Aug 2016, Paul Gardner-Stephen wrote:

> Hello,
>
> I'm thinking of putting something in from the perspective of the Serval
> Project, but want to run our thoughts past the community first.
>
> For our next generation of Mesh Extenders (basically an Ath9k board +
> 900MHz packet radio), we are hoping to get them FCC and EC certified, and
> available for sale.  Lack of development funds necessitates that we have
> only one version of the hardware for all target markets.  So what we are
> planning to do is to have the power lead include several additional pins,
> where the power cable indicates the regulatory regime that applies to the
> unit, and also whether 3rd party firmware can be loaded.
>
> That is, to modify the regulatory regime, you either need the right cable
> for that country, or alternatively, you wire up a "developer cable," that
> allows you to install your own firmware.  In other words, we place a
> hardware barrier to prevent abuse through trivial software reconfiguration,
> but still make it easy for the development community to load their own
> firmware.
>
> What are people's thoughts on this approach?

rather than requiring special cables, just do jumpers (or an array of 0-ohm 
resisters). It's been good enough for commercial and ham radios for decades. 
same basic idea as your extra pins on the cable, but wihtout the expense of 
cables.

David Lang
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