12 Volt GPS to Raspberry pi - Printable Version +- OpenMarine (https://forum.openmarine.net) +-- Forum: OpenPlotter (https://forum.openmarine.net/forumdisplay.php?fid=1) +--- Forum: How do I...? (https://forum.openmarine.net/forumdisplay.php?fid=3) +--- Thread: 12 Volt GPS to Raspberry pi (/showthread.php?tid=1577) |
12 Volt GPS to Raspberry pi - jodi001 - 2018-11-16 I have an old GPS antenna installed on my boat that I have got some readnings from to my VHF, but only when it is supplied with 12 volts. The antenna is a Navman 1220a. I have tried power the antenna with 5 volts from a USB to serial adapter and get the readings to Raspberry pi and opencpn with no luck. I also tried to supply the antenna with 12 volts and via a voltage divider connect the NMEA out to my USB adapter, but no readnings. Are there a way to get my old antenna that seems to need 12 volts to operate to communicate with my Raspberry pi and opencpn or do I have to get a USB GPS? Regards, Joakim RE: 12 Volt GPS to Raspberry pi - e-sailing - 2018-11-16 Your old GPS does use RS422 communication. You need a RS422 to usb adapter. The doc says it works from 4.5 to 16.5 volts But the Navman 1220a is old. A new GPS is better (less energy, faster, more accurate). Martin |