Re: EG25GGB-256-SGNS Quectel board for LTE and GNSS not connecting to 4G or GPS #phone #help #automotive

["Scott Murray" <scott.murray@xxxxxxxxxxxx>]

On Fri, 18 Dec 2020, Vele Tosevski wrote:

> Hey guys,
>
> I have been trying to connect the Quectel EG25GGB-256-SGNS chip to AGL with little success.
>
> I am running Jellyfish 10.0.1 on a 2GB, RaspberryPi4 board. The chip is mini PCI connected to the RPi4 via usb.
>
> This is my dmesg output:
[snip]
> So I've corrected that "No support over 100mA line by adding the following rule to /etc/udev/rules.d/99-usb.rule:
>
> ACTION=="add", SUBSYSTEM=="usb", DRIVER=="usb", KERNEL=="1-1.2.3", RUN+="/bin/sh -c 'echo 1 > /sys/bus/usb/devices/1-1.2.3/bConfigurationValue'"
>
> However, the modem is not connecting to LTE. Here is my output for connmanctl services:
>
> Bell                 cellular_xxxxxxxxxxxxxxxx_context3
> Bell                 cellular_xxxxxxxxxxxxxxxx_context2
> Bell                 cellular_xxxxxxxxxxxxxxxx_context1
>
> And for context 1:
>
> /net/connman/service/cellular_xxxxxxxxxxxxxxx_context1
> Type = cellular
> Security = [  ]
> State = idle
[snip]
> IPv6 = [  ]
> IPv6.Configuration = [ Method=auto, Privacy=disabled ]
> Nameservers = [  ]
> Nameservers.Configuration = [  ]
> Timeservers = [  ]
> Timeservers.Configuration = [  ]
> Domains = [  ]
> Domains.Configuration = [  ]
> Proxy = [  ]
> Proxy.Configuration = [  ]
> mDNS = False
> mDNS.Configuration = False
> Provider = [  ]
>
> It's the same for the other contexts.
>
> My journalctl looks like this when I try to run "connmanctl connect cellular_xxxxxxxxxxxxxxx_context1":
>
> connmand[273]: Failed to change property: /quectelqmi_0/context1 org.ofono.ConnectionContext.Active: org.ofono.Error.NotImplemented Implementation not provided
> afbd-agl-service-network[284]:  INFO: [API network-manager] report-error: service_path=/net/connman/service/cellular_xxxxxxxxxxxxxxx_context1 error=connect-failed [/usr/src/debug/agl-service-network/1.0+gitAUTOINC+3609c1aa41-r0/git/binding/network-api.c:724,handle_method_call]
> dbus-daemon[174]: [system] Rejected send message, 0 matched rules; type="error", sender=":1.12" (uid=1 pid=284 comm="afbd-agl-service-network                          " label="User::App::agl-service-network") interface="(unset)" member="(unset)" error name="org.freedesktop.DBus.Error.UnknownMethod" requested_reply="0" destination=":1.10" >
>
> The error when running the connect is:
>
> Error /net/connman/service/cellular_302610032501341_context1: Input/output error
>
> Also, the gps does not connect, giving the error "No GNSS 3D fix".
>
> Do I need to configure the modem in ofono? Any help would be appreciated. I need to make this work!

It's been quite a while since I did this, but I seem to recall that the
context information should have a lot more fields filled in.  I would
suggest checking whether there is a APN configuration coming from
serviceproviders.xml in the mobile-broadband-config package that is
incorrect and breaking things.  That was the case with my local provider
(Fido) when I played with this last; I added a patch for the telematics
demo image to clear it since the SIM defaults worked.  So I would check
that and perhaps check what some of the tools in the ofono-tests package
show, I believe I used "list-contexts" to debug my issue.

For the gps, you likely will need some tweaks, take a look at the
sw-gpsd-udev-conf recipe and gpsd bbappend in meta-agl-telematics-demo
in Icefish/Jellyfish (or in meta-agl-demo in master) to get an idea.

Scott


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