История
19 июля 2019
Новая страница: «=== Ntpd setting === In ntpd server settings we need to specify two new sources of exact time: NMEA and PPS.»
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Новая страница: «=== gpsd settings ===»
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Новая страница: «=== Settings ===»
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Новая страница: «== GPSD == Daemon gpsd is a unified Protocol of interaction with the receivers of the satellite signals of GPS/GLONASS. In our case, we will use it as an intermed…»
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Новая страница: «Note that the ntpd 28 driver (shared memory driver), see below, which allows the use of gpsd functions, is not marked with an "o", even if PPS is used. If it work…»
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Новая страница: «{| class="wikitable" ! Symbol !! Value |- | * || current source used |- | # || source selected but too remote |- | o || source selected, PPS signal used |- | + ||…»
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Новая страница: «The exact time sources are marked with special characters:»
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Новая страница: «=== Current accurate time sources for NPTD ===»
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Новая страница: «== NTPD == Ntpd service is used as application SOFTWARE. By default, the ntpd server is configured to receive time from other servers on the Internet using ntp. T…»
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Новая страница: «In the figure, the fragments of NMEA messages are highlighted in red, showing that the GPS module has reliably recorded its position and receives the correct data…»
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Новая страница: «600px|thumb|right|Check for NMEA data»
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Новая страница: «=== Check for data in NMEA format === To verify that the system can receive data from the GPS module in NMEA format, run the following command <pre>cat /dev/tty…»
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Новая страница: «The command will sequentially display the UNIX-time timestamps with a decimal part (the timestamps can be read in the file <code>/sys/class/pps/pps2/assert</code>).»
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Новая страница: «600px|thumb|right|Check for a pps signal»
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Новая страница: «=== Check for pps signal === At the command prompt, run <code>ppstest /dev/pps2</code>.»
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Новая страница: «The pps pulse is precisely synchronized with the beginning of each second, which makes it possible to increase the accuracy of the time determination on the contr…»
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Новая страница: «The controller module is represented by two devices - serial port /dev/ttyMOD3 and signal transmission device pps /dev/pps2 Port /dev/ttyMOD3 transmits data from…»
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Новая страница: «== NMEA and PPS ==»
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Новая страница: «It is further assumed that the module is installed into the controller that is configured and functioning correctly checked (see section Wiren_Board 6:_WBE2R-R-…»
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Новая страница: «The WBE2R-R-GPS module allows you to autonomously synchronize the exact time of the controller by GLONASS/GPS signals and use the controller as a source of accura…»
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Новая страница: «'''THE ARTICLE IS IN PROGRESS!'''»
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Новая страница: «<!--{{DISPLAYTITLE:Настройка сервера точного времени на контроллере Wiren Board 6 с модулем WBE2R-R-GPS}}-->»
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Новая страница: «Wiren Board 6: WBE2R-R-GPS GPS/GLONASS Extension Module:NTPD PPS Setup»
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