gpsd | service daemon

gpsd is a C library. gpsd has no bugs and it has low support. However gpsd has 2 vulnerabilities and it has a Non-SPDX License. You can download it from GitLab.

gpsd is a userland daemon acting as a translator between GPS and AIS receivers and their clients. gpsd listens on port 2947 for clients requesting position/time/velocity information. The receivers are expected to generate position information in a well-known format -- as NMEA-0183 sentences, SiRF binary, Rockwell binary, Garmin binary format, or other vendor binary protocols. gpsd takes this information from the GPS and translates it into something uniform and easier to understand for clients. The distribution includes sample clients, application interface libraries, and test/profiling tools. The website for GPSD where you can find updates, news, and project mailing lists is: See that website for a list of GPS units known to be compatible. See the file INSTALL.adoc for installation instructions and some tips on how to troubleshoot your installation. The file build.adoc has instructions for building from source. The packaging/ directory contains resources and suggestions for packagers and distribution integrators. Remco Treffkorn designed and originated the code. Russ Nelson maintained gpsd for a couple of years. Carsten Tschach's gpstrans-0.31b code was the original model for nmea_parse.c. Bob Lorenzini hwm@netcom.com provided testing and feedback. Brook Milligan brook@trillium.NMSU.Edu combined gpsd and gpsclient into one package and autoconfiscated it. Derrick J. Brashear shadow@dementia.org (KB3EGH) added code for the EarthMate DeLorme. He also added "incredibly gross code to output NMEA sentences" (his own words :-) He also did the first cut at DGPS support (see for the Earthmate. Curt Mills BowHunter@mail.com (WE7U) furthered the dgps support, writing the portion for other GPS receivers. None of these people have been active in 2.X and later versions; gpsd has evolved out of recognition from the 1.X codebase. The main feature of the 3.x versions is a stabilized and finalized version of the JSON command/response protocol. This was designed and mainly implemented by ESR. Gary Miller wrote the subframe support.