[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 

David Lang
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