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[aprssig] Tomtom's For APRS (Question)

Sander Pool sander_pool at pobox.com
Mon Apr 2 03:11:05 UTC 2012

As long as GPS modules output at least TTL level serial communications 
(UART) it won't be a problem interfacing them to legacy equipment. 
Already though at least some of them are adding or switching to other 
serial protocols (I think SPI and TWI) which are often supported in 
hardware by microcontrollers like AVRs and PICs.

The 2.5 mini jack on the D72 is not a mirror of the USB serial port. It 
outputs NMEA from the GPS or APRS waypoint data. It can not be used to 
talk to the TNC. I think that qualifies as limited.


     Sander W1SOP

On 4/1/2012 11:03 PM, Lawrence LaBranche wrote:
> The USB gps pucks could be hacked to    access the serial GPS info before it gets converted to UPS. A bit of a pain.
> Low volume manufactures could continue to make RS-232 GPS.
> More radios and TNCs could embed GPS or allow embedded GPS modules in to them.
> I am unclear why you think the D72 is limited by the USB interface. The D72 does have a regular serial port via a 2.5  mini jack.

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