Arch Linux

Docbroke

Member

From: India

Registered: 2015-06-13

Posts: 1,438

SOLVED - GPS not working

I am using arch on Dell latitude e6230. Recently I added mini PCI-e card DW5560 with support for GPS and GSM/3G.
3G works fine with modemmanager/networkmanager. For gps I installed wvdial and configures as follows

___________________________________
[Dialer Defaults]
Baud = 3600000
Dial Attempts = 1
Dial Command = ATDT
ISDN = 0
Init1 = ATZ
Init2 = AT+CGDCONT=1,"IP","bsnlnet"
#Init2 = ATQ0 V1 E1 S0=0 &C2 &D2
#Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
#Init4 = AT^SYSCFG=14,2,3FFFFFFF,2,4
#Init3 = AT+CGDCONT=1,"IP","bsnlnet"
#Init4 = AT+CPIN=1234
Modem = /dev/ttyACM0
Modem Type = Analog Modem
New PPPD = yes
Phone = *99#
Stupid Mode = 1
Username = " "
Password = " "

[Dialer gps]
Modem = /dev/ttyACM2
Init1 = AT*E2GPSCTL=1,2,1
Init2 = AT*E2GPSNPD

[Dialer on]
Modem = /dev/ttyACM0
Init1 = AT+CFUN=1

[Dialer off]
Modem = /dev/ttyACM0
Init1 = AT+CFUN=4

[Dialer connect]
Modem = /dev/ttyACM1
__________________________

with $ sudo wvdial gps
I get random data suggestive of GPS working like below

______________________________________________
[sharad@sharad ~]$ sudo wvdial gps
--> WvDial: Internet dialer version 1.61
--> Initializing modem.
--> Sending: AT*E2GPSCTL=1,2,1
AT*E2GPSCTL=1,2,1
OK
--> Sending: AT*E2GPSNPD
AT*E2GPSNPD
OK
--> Modem initialized.
--> Sending: ATDT*99#
--> Waiting for carrier.
ATDT*99#
$GPGSV,1,1,01,27,,,38*76
  1015,,,N*46
                                                                                     $GPGLL,,,,,104334.364,V,N*7A
,,N*46
                                                                                     $GPGGA,104334.364,,,,,0,0,,,M,,M,,*48
_____________________________________________

I have installed gpsd, on using it with

[sharad@sharad ~]$ sudo gpsd /dev/ttyACM2 -F /var/run/gpsd.sock
[sharad@sharad ~]$ xgps

xgps opens but it looks like it is not receiving any GPS data, no fix, no satellites are shown. Somehow gpsd is not able to read data from /dev/ttyACM2.

Last edited by Docbroke (2015-10-24 03:36:54)

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byte

Member

From: Düsseldorf (DE)

Registered: 2006-05-01

Posts: 2,046

Re: SOLVED - GPS not working

Did you add your user to the "uucp" group?

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1000

Docbroke

Member

From: India

Registered: 2015-06-13

Posts: 1,438

Re: SOLVED - GPS not working

Thanks for reply.
Did it after reading your message. Doesn't seem to make any difference.
after reading guide for gpsd troubleshooting on catb.org, I run

$ gpsmon /dev/ttyACM2

/dev/ttyACM2 4800 8N1         Unknown device>

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Docbroke

Member

From: India

Registered: 2015-06-13

Posts: 1,438

Re: SOLVED - GPS not working

Finally got gpsd working.
Issue was with  starting gpsd as service, after I stopped gpsd service, it started to work. So now using following simple script.
_______________________________________
#!/bin/bash
# start gpsd wvlan and xgps

sudo killall gpsd
sudo gpsd /dev/ttyACM2 -F /var/run/gpsd.sock
sudo wvdial gps
xgps
________________________________________

Once this script gets gps active via wvdial, I press control+c to stop wvdial and start xgps, so it works. Now looking for some good navigation software.

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