# RC7620: GPS daemon failed **URL:** \ **Category:** IoT Modules\ **Tags:** feature-request\ **Created:** [December 5, 2024, 9:34am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108 "2024-12-05T09:34:34Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![petertseng](https://avatars.discourse-cdn.com/v4/letter/p/59ef9b/32.png) [@petertseng](https://forum.sierrawireless.com/u/petertseng)\ **Post date:** [December 5, 2024, 9:34am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/1 "2024-12-05T09:34:34Z")
Hello everyone, I try to start GPS daemon in my embedded linux system. but getting the following error: $ gpsd -D 5 -N /dev/ttyUSB1 gpsd:INFO: launching (Version 3.25, revision 3.25) gpsd:INFO: starting uid 0, gid 0 gpsd:INFO: Command line: gpsd -D 5 -N /dev/ttyUSB1 gpsd:IO: opening IPv4 socket gpsd:ERROR: can’t bind to IPv4 port gpsd, Address already in use(98) gpsd:ERROR: maybe gpsd is already running! Or systemd has the port? gpsd:IO: opening IPv6 socket gpsd:ERROR: can’t bind to IPv6 port gpsd, Address already in use(98) gpsd:ERROR: maybe gpsd is already running! Or systemd has the port? gpsd:ERROR: command sockets creation failed, netlib errors -1, -1 Does anyone has the same issue? Thank you in advance. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [December 5, 2024, 10:01am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/2 "2024-12-05T10:01:04Z")
does this help? [https://forums.raspberrypi.com/viewtopic.php?t=128045](https://forums.raspberrypi.com/viewtopic.php?t=128045) BTW, you need to make sure /dev/ttyUSB1 can output some NMEA frame first in minicom or putty ---
**Author:** ![petertseng](https://avatars.discourse-cdn.com/v4/letter/p/59ef9b/32.png) [@petertseng](https://forum.sierrawireless.com/u/petertseng)\ **Post date:** [December 6, 2024, 2:17am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/3 "2024-12-06T02:17:55Z")
How to output NMEA frames from /dev/ttyUSB1? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [December 6, 2024, 2:26am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/4 "2024-12-06T02:26:45Z")
you can try ```auto AT!ENTERCND="A710" AT!GPSEND=0 AT!GPSFIX=? AT!GPSFIX=1,255,10000 ``` ---
**Author:** ![petertseng](https://avatars.discourse-cdn.com/v4/letter/p/59ef9b/32.png) [@petertseng](https://forum.sierrawireless.com/u/petertseng)\ **Post date:** [December 6, 2024, 3:00am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/5 "2024-12-06T03:00:37Z")
I enter the AT-COMMAND you gave me. $ ATCMD /dev/ttyUSB2 ‘AT!ENTERCND=“A710”’ AT!ENTERCND=“A710” OK $ ATCMD /dev/ttyUSB2 ‘AT!GPSEND=0’ AT!GPSEND=0 OK $ ATCMD /dev/ttyUSB2 ‘AT!GPSFIX=?’ AT!GPSFIX=? !GPSFIX: ,, : 1-Standalone, 2-MS-Based, 3-MS-Assisted : 1-255 seconds : 1-4294967280 meters OK $ ATCMD /dev/ttyUSB2 ‘AT!GPSFIX=1,255,10000’ AT!GPSFIX=1,255,10000 OK Then I use minicom to open /dev/ttyUSB1 $ minicom -D /dev/ttyUSB1 I get continuous output NMEA frames: $PQXFI,\*7A $GPRMC,V,N,\*7F $GARMC,V,N,\*6E $GPGSA,A,1,\*32 $GAGSA,A,1,\*23 $GNGSA,A,1,\*2C $GPGRS,_51 $GPGLL,V,N_64 $GPGGA,0,_66 $GAGGA,0,77 $PQXFI,7A $GPRMC,V,N,7F $GARMC,V,N,6E $GLGSV,1,1,03,66,50.6,355.8,77,53.4,237.7,76,65.4,357.2,145 $PQGSV,1,1,01,01,49.9,129.4,0,451 $GPGSV,2,1,06,10,61.9,199.7,16,21,26,29.5,210.9,16C $GPGSV,2,2,06,28,49.9,310.8,31,31.6,274.2,163 $GNGNS,025053.82,NNN,38 $GPVTG,T,M,N,K,N2C $GAVTG,T,M,N,K,N_3D $GPGGA,0,_66 $GAGGA,0,77 $PQXFI,025053.08,5D $GPRMC,V,N,7F $GARMC,V,N,6E $GPGSA,A,1,32 $GAGSA,A,1,23 $GNGSA,A,1,2C $GPGRS,51 $GPGLL,025053.08,V,N43 $GPGGA,0,66 $PQXFI,7A $GLGSV,2,1,08,78,66,50.6,355.8,77,53.4,237.7,76,65.4,357.2,142 $GLGSV,2,2,08,75,9.8,28.1,65,57.7,101.3,67,4.9,327.7,72,6.3,133.6,177 $PQGSV,4,1,14,01,49.9,129.4,02,42.9,243.3,03,60.5,201.1,04,35.9,115.3,0,464 $PQGSV,4,2,14,05,19.0,258.8,06,53.4,317.8,07,20.4,181.4,08,59.8,208.1,0,461 $PQGSV,4,3,14,09,48.5,296.7,10,13.4,191.3,12,13,61.9,232.0,0,452 $PQGSV,4,4,14,14,57.7,330.5,16,54.8,327.7,0,464 $GPGSV,3,1,11,10,61.9,199.7,12,12.0,38.0,16,21,150 $GPGSV,3,2,11,23,24.6,164.5,25,50.6,49.2,26,29.5,210.9,28,49.9,310.8,15D $GPGSV,3,3,11,29,15.5,116.7,31,31.6,274.2,32,57.0,7.0,15E $GNGNS,025102.82,NNN,3D $GPVTG,T,M,N,K,N2C $GAVTG,T,M,N,K,N_3D $GPGGA,0,\*66 $GAGGA,0,\*77 $PQXFI,025102.08,\*58 $GPRMC,V,N,\*7F $GARMC,V,N,_6E $GPGSA,A,1,32 $GAGSA,A,1,23 $GNGSA,A,1,2C $GPGRS,51 $GPGLL,025102.08,V,N46 $GPGGA,0,66 $GAGGA,0,77 $PQXFI,7A $GPRMC,V,N,7F $GARMC,V,N,6E $GLGSV,2,1,08,78,66,50.6,355.8,77,53.4,237.7,76,65.4,357.2,142 $GLGSV,2,2,08,75,9.8,28.1,65,57.7,101.3,67,4.9,327.7,72,6.3,133.6,177 $PQGSV,4,1,14,01,49.9,129.4,02,42.9,243.3,03,60.5,201.1,04,35.9,115.3,0,464 $PQGSV,4,2,14,05,19.0,258.8,06,53.4,317.8,07,20.4,181.4,08,59.8,208.1,0,461 $PQGSV,4,3,14,09,48.5,296.7,10,13.4,191.3,12,13,61.9,232.0,0,452 $PQGSV,4,4,14,14,57.7,330.5,16,54.8,327.7,0,464 $GPGSV,3,1,11,10,61.9,199.7,12,12.0,38.0,16,21,150 $GPGSV,3,2,11,23,24.6,164.5,25,50.6,49.2,26,29.5,210.9,28,49.9,310.8,15D $GPGSV,3,3,11,29,15.5,116.7,31,31.6,274.2,32,57.0,7.0,1_5E Does this mean I need to enter AT-COMMAND every time before starting GPSD? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [December 6, 2024, 3:05am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/6 "2024-12-06T03:05:01Z")
i don’t know you can make some test to confirm ---
**Author:** ![petertseng](https://avatars.discourse-cdn.com/v4/letter/p/59ef9b/32.png) [@petertseng](https://forum.sierrawireless.com/u/petertseng)\ **Post date:** [December 6, 2024, 8:06am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/7 "2024-12-06T08:06:02Z")
Currently I use the RC7620 for EVK testing, but this may be replaced by the RC7630 in the future. Can I use the same AT-COMMAND? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [December 6, 2024, 8:40am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/8 "2024-12-06T08:40:38Z")
i think so, it should still support AT!GPSFIX command ---
**Author:** ![petertseng](https://avatars.discourse-cdn.com/v4/letter/p/59ef9b/32.png) [@petertseng](https://forum.sierrawireless.com/u/petertseng)\ **Post date:** [February 11, 2025, 10:08am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/9 "2025-02-11T10:08:31Z")
I’m currently running the RC7620 on my custom PCB board. The following two issues occurred: 1. After about 3 minutes, the NMEA stream will stop sending. 2. When I successfully get a fix using tools (cgps and gpsmon), the NMEA stream stops sending. Does anyone has the same issue? Thank you in advance. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [February 11, 2025, 10:11am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/10 "2025-02-11T10:11:53Z")
you can initialize the GPS fix by AT!GPSEND=0 AT!GPSFIX=1,255,1000 ---
**Author:** ![petertseng](https://avatars.discourse-cdn.com/v4/letter/p/59ef9b/32.png) [@petertseng](https://forum.sierrawireless.com/u/petertseng)\ **Post date:** [February 12, 2025, 2:22am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/11 "2025-02-12T02:22:25Z")
Do I need to turn off the GPS AUTOSTART function? My current setup looks like this: AT!GPSAUTOSTART? function: 2 fixtype: 1 maxtime: 180 seconds maxdist: 50 meters fixrate: 1 seconds OK ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [February 12, 2025, 2:28am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/12 "2025-02-12T02:28:00Z")
I think it does not matter But you can make a test first ---
**Author:** ![petertseng](https://avatars.discourse-cdn.com/v4/letter/p/59ef9b/32.png) [@petertseng](https://forum.sierrawireless.com/u/petertseng)\ **Post date:** [February 12, 2025, 8:17am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/13 "2025-02-12T08:17:48Z")
How to query the current AT!GPSFIX setting value? I tried and got the following results: $ ATCMD /dev/ttyUSB2 ‘AT!GPSFIX=?’ AT!GPSFIX=? !GPSFIX: ,, : 1-Standalone, 2-MS-Based, 3-MS-Assisted : 1-255 seconds : 1-4294967280 meters OK $ ATCMD /dev/ttyUSB2 ‘AT!GPSFIX?’ AT!GPSFIX? ERROR ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [February 12, 2025, 8:32am UTC](https://forum.sierrawireless.com/t/rc7620-gps-daemon-failed/34108/14 "2025-02-12T08:32:56Z")
According to AT command user guide, I don’t think you can query the current setting: ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/f/fb2a9b91a4192d42f0c5adbd645abeb9cd77c293.png)