Garmin serial cable

Discussion related to the Garmin GPSMAP 66s/st GPSr
Art
Posts: 83
Joined: Sat Nov 10, 2018 9:14 am

Re: Garmin serial cable

Unread post by Art »

I’ve found the GPS also needs to be externally powered.
You wouldn’t be able to tell with the cable intact because the PCB in the cable also needs power,
but if you only disconnect power to the GPS on the GPS USB connector side, it decides not to send or receive NMEA sentences.
Art
Posts: 83
Joined: Sat Nov 10, 2018 9:14 am

Re: Garmin serial cable

Unread post by Art »

I pulled apart a USB OTG card reader to get a USB micro plug,
made my own adapter, and then the 66 said also work with the cable. Thanks :)
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