[aprssig] mic-e: technical info or source code ??

Scott Miller scott at opentrac.org
Wed May 29 16:57:15 EDT 2013

Mic-E is just one format of APRS, which is normally used over 1200 baud 
AX.25.  You'll want to look up the APRS specification.


There are plenty of open source APRS clients out there.  My OpenTracker 
series will decode Mic-E, but won't encode it because I feel that Base91 
is a better solution.  The devices will still work as mic encoders, 
sending a burst when you unkey, just not in the format normally referred 
to as Mic-E.


On 5/29/2013 1:28 PM, Kristoff Bonne wrote:
> Hi,
> I'm trying to find the technical documentation on the mic-e protocol.
> (i.e. the 300 ms burst to be send at the end of a voice transmission on
> a repeater).
> There is a webpage on info.aprs.net, but that does not even mention the
> modulation scheme, baudrate, etc.
> Is the open-source code available for decoding and encoding mic-e
> transmissions? Is there an open-source hardware implementation of it?
> 73
> kristoff - ON1ARF
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