Can't get Quectel UC20 modem working on Embedded Board
Brendan Simon (eTRIX)
brendan.simon at etrix.com.au
Sat Dec 12 14:34:28 PST 2015
Working now. See below.
On 12/12/2015 11:09 PM, Brendan Simon (eTRIX) wrote:
> More info below.
>
> On 12/12/2015 10:53 PM, Brendan Simon (eTRIX) wrote:
>> Hi,
>>
>> Not sure if this the best forum to ask questions regarding MM
>> configuration, etc. I hope so. If not please refer me to
>> appropriate forums.
>>
>> I have a Quectel UC20 gsm modem. I got it working under Debian
>> Jessie on my MacBook (using VirtualBox). It all seem to go well and
>> had no problems getting it to work (well, after I unloaded the option
>> driver, as the Quectel documentation only specifies the multiple tty
>> method to access the modem).
>>
>> Now I have installed the same modem (on an evaluation board) to my
>> embedded arm board (Digilent ZedBoard with Xilinx Zynq dual ARM-A9
>> SOC), also running Debian Jessie. It's conncected via a USB OTG
>> port. It shows up with lsusb and also the /dev/cdc-wdm0 entry is
>> populated. MM can see the device with 'mmcli -L' and 'mmcli -m 0'
>> reports a bunch of information, so everything looks fine as far as
>> detecting and communicating with the device.
>>
>> However, I just can't get it to connect to my ISP. It works ok on
>> the full Debian Jessie system, but not on the ZedBoard.
>> I copied the /etc/NetworkManager/system-connections/<myisp> file from
>> the VB system. I presume that is ok and MM should work.
>>
>> I thought I would try creating a new connection, but I can't find a
>> way of doing this from the cli. nm-connection-editor is gnome app
>> and I don't have gnome installed on my embedded board. I tried
>> nmtui, nmtui-edit, nmtui-connect, but there are no options to add a
>> Mobile Broadband connection as there is with nm-connection-editor.
>>
>> Is there a nice/easy way of adding a new Mobile Broadband connection
>> with the cli tools ?
>>
>> # cat /etc/NetworkManager/system-connections/Telstra\ Telstra\
>> \(Next\ G\)\ 1
>> [connection]
>> id=Telstra Telstra (Next G) 1
>> uuid=5ee505f2-e161-436b-9b00-b36cab43ebfc
>> type=gsm
>>
>> [gsm]
>> number=*99#
>> password-flags=1
>> apn=telstra.internet
>> network-type=4
>>
>> [ipv6]
>> method=auto
>>
>> [ipv4]
>> method=auto
>>
>> [serial]
>> baud=115200
>>
>>
>> # lsmod
>> Module Size Used by
>> cp210x 7582 0
>> qmi_wwan 10608 0
>> cdc_wdm 8788 2 qmi_wwan
>> usbnet 17174 1 qmi_wwan
>> mii 3417 1 usbnet
>> ipv6 262886 24
>>
>>
>> # cat /boot/config-4.0.0-g0fa909f-dirty | grep -v '#' | grep
>> 'WWAN\|QMI\|USB_SERIAL\|PPP\|QUALCOM'
>> CONFIG_NET_VENDOR_QUALCOMM=y
>> CONFIG_PPP=m
>> CONFIG_PPP_BSDCOMP=m
>> CONFIG_PPP_DEFLATE=m
>> CONFIG_PPP_FILTER=y
>> CONFIG_PPP_MPPE=m
>> CONFIG_PPP_MULTILINK=y
>> CONFIG_PPPOE=m
>> CONFIG_PPP_ASYNC=m
>> CONFIG_PPP_SYNC_TTY=m
>> CONFIG_USB_NET_QMI_WWAN=m
>> CONFIG_USB_SERIAL=y
>> CONFIG_USB_SERIAL_GENERIC=y
>> CONFIG_USB_SERIAL_CP210X=m
>> CONFIG_USB_SERIAL_FTDI_SIO=y
>> CONFIG_USB_SERIAL_PL2303=m
>> CONFIG_USB_SERIAL_QCAUX=m
>> CONFIG_USB_SERIAL_QUALCOMM=m
>> CONFIG_USB_SERIAL_WWAN=m
>> CONFIG_USB_SERIAL_OPTION=m
>>
>
> # mmcli -L
>
> Found 1 modems:
> /org/freedesktop/ModemManager1/Modem/0 [QUALCOMM INCORPORATED] 0
>
>
> # mmcli -m 0
>
> /org/freedesktop/ModemManager1/Modem/0 (device id
> 'a6620fb85776960b03a5848959ac4607cf6922dc')
> -------------------------
> Hardware | manufacturer: 'QUALCOMM INCORPORATED'
> | model: '0'
> | revision: 'UC20GQAR03A05M1024 1 [2014/05/05 9:00:00]'
> | supported: 'gsm-umts'
> | current: 'gsm-umts'
> | equipment id: '861075020977922'
> -------------------------
> System | device:
> '/sys/devices/soc0/amba at 0/e0002000.usb/ci_hdrc.0/usb1/1-1/1-1.4'
> | drivers: 'qmi_wwan'
> | plugin: 'Generic'
> | primary port: 'cdc-wdm0'
> | ports: 'cdc-wdm0 (qmi), wwan0 (net)'
> -------------------------
> Numbers | own : 'unknown'
> -------------------------
> Status | lock: 'sim-pin2'
> | unlock retries: 'sim-pin (3), sim-pin2 (3), sim-puk (10),
> sim-puk2 (10)'
> | state: 'connected'
> | power state: 'on'
> | access tech: 'umts'
> | signal quality: '68' (recent)
> -------------------------
> Modes | supported: 'allowed: 2g; preferred: none
> | allowed: 3g; preferred: none
> | allowed: 2g, 3g; preferred: none
> | allowed: 2g, 3g; preferred: 2g
> | allowed: 2g, 3g; preferred: 3g'
> | current: 'allowed: 2g, 3g; preferred: 3g'
> -------------------------
> Bands | supported: 'cdma-bc15-aws, dcs, egsm, pcs, g850,
> u2100, u1900, u800, u850, u900'
> | current: 'cdma-bc15-aws, dcs, egsm, pcs, g850,
> u2100, u1900, u800, u850, u900'
> -------------------------
> IP | supported: 'ipv4, ipv6, ipv4v6'
> -------------------------
> 3GPP | imei: '861075020977922'
> | enabled locks: 'none'
> | operator id: '50501'
> | operator name: 'Telstra'
> | subscription: 'unknown'
> | registration: 'home'
> -------------------------
> SIM | path: '/org/freedesktop/ModemManager1/SIM/0'
>
> -------------------------
> Bearers | paths: '/org/freedesktop/ModemManager1/Bearer/0'
>
>
> # mmcli -v -m 0 --simple-connect="apn=telstra.internet"
> [01 Jan 1970, 00:55:11] [Debug] Forcing request to be run asynchronously
> [01 Jan 1970, 00:55:11] [Debug] Assuming '0' is the modem index
> [01 Jan 1970, 00:55:11] [Debug] ModemManager process found at ':1.2'
> [01 Jan 1970, 00:55:11] [Debug] Modem found at
> '/org/freedesktop/ModemManager1/Modem/0'
>
> [01 Jan 1970, 00:55:11] [Debug] Asynchronously connecting the modem...
> successfully connected the modem
>
>
> # ifconfig
> eth0 Link encap:Ethernet HWaddr 00:0a:35:00:01:22
> inet addr:10.0.0.194 Bcast:10.0.0.255 Mask:255.255.255.0
> inet6 addr: fe80::20a:35ff:fe00:122/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:8040 errors:0 dropped:0 overruns:0 frame:0
> TX packets:3032 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:585787 (572.0 KiB) TX bytes:419965 (410.1 KiB)
> Interrupt:34 Base address:0xb000
>
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:65536 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
>
> wwan0 Link encap:Ethernet HWaddr 92:00:b6:f4:ce:10
> inet6 addr: fe80::9000:b6ff:fef4:ce10/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:0 (0.0 B) TX bytes:648 (648.0 B)
>
>
> I just can't seem to get an IP address. There must be a
> misconfiguration or something not installed, but I can't work out what
> it is.
>
> Thanks, Brendan.
Er, it's now working. Why? Not sure.
I had to try out a new SD card (Samsung with larger capacity, 32GB, as
my Sandisk 32GB cards weren't working), so I recreated my rootfs,
created the disk image, dd to sd card, booted, scp the NM
system-configurations config file from VBox system to target board,
restarted NM (not sure if I had too or not), and ifconfig shows me an
assigned IP address :)
So, not sure what the heck is going on, but maybe my running system was
out of whack and just needed a reboot. I was installing some packages
directly on the target with aptitude. Hopefully it's reliable and
stable so that the IP connections always comes up on boot, and stays
up. Fingers crossed :)
Brendan.
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