No TX with wwan0 using Quectel BG96 and qmi_wwan
Simon Rijk
s.rijk at viriciti.com
Fri Nov 1 09:22:27 UTC 2019
*Hello,*
*We are trying to get the Quectel BG96 modem to work with qmi_wwan using
ModemManager and NetworkManager. *
*Basically, we can only receive data but we cannot transmit data. We have
tried TCP, UDP and ICMP packets. All information on our efforts is
described below:*
*We followed the instructions from Quectel to support the Qeuctel BG96: *
*https://www.quectel.com/UploadImage/Downlad/Quectel_WCDMA<E_Linux_USB_Driver_User_Guide_V1.8.pdf*
<https://www.quectel.com/UploadImage/Downlad/Quectel_WCDMA<E_Linux_USB_Driver_User_Guide_V1.8.pdf>
*Linux kernel version: 4.9.88*
*ModemManager version: 1.10.8*
*NetworkManager version: 1.18*
*libqmi version: 1.24.0*
*The udev rule for ModemManager for the BG96:*
*ACTION!="add|change|move|bind", GOTO="mm_quectel_port_types_end"*
*SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c7c", GOTO="mm_quectel_port_types"*
*GOTO="mm_quectel_port_types_end"*
*LABEL="mm_quectel_port_types"*
*SUBSYSTEMS=="usb", ATTRS{bInterfaceNumber}=="?*",
ENV{.MM_USBIFNUM}="$attr{bInterfaceNumber}"*
*# Quectel BG96*
*ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0296",
ENV{ID_MM_TTY_BAUDRATE}="115200"*
*ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0296",
ENV{.MM_USBIFNUM}=="00", ENV{ID_MM_PORT_TYPE_QCDM}="1"*
*ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0296",
ENV{.MM_USBIFNUM}=="01", ENV{ID_MM_PORT_TYPE_GPS}="1"*
*ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0296",
ENV{.MM_USBIFNUM}=="02", ENV{ID_MM_PORT_TYPE_AT_PRIMARY}="1"*
*ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0296",
ENV{.MM_USBIFNUM}=="03", ENV{ID_MM_PORT_TYPE_AT_SECONDARY}="1"*
The output of ModemManager:
# mmcli -m 0
--------------------------------
General | dbus path: /org/freedesktop/ModemManager1/Modem/0
| device id: cd57e3b09272b583c826a931e0e771c502c59a3d
--------------------------------
Hardware | manufacturer: QUALCOMM INCORPORATED
| model: 0
| revision: BG96MAR02A07M1G
| h/w revision: 10000
| supported: gsm-umts, lte
| current: gsm-umts, lte
| equipment id: 862061043536548
--------------------------------
System | device:
/sys/devices/soc0/soc/2100000.aips-bus/2184000.usb/ci_hdrc.0/usb1/1-1
| drivers: option1, qmi_wwan
| plugin: Quectel
| primary port: cdc-wdm0
| ports: ttyUSB0 (qcdm), ttyUSB1 (gps), ttyUSB2
(at),
| cdc-wdm0 (qmi), wwan0 (net), ttyUSB3 (at)
--------------------------------
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: gsm
| signal quality: 71% (recent)
--------------------------------
Modes | supported: allowed: 2g; preferred: none
| allowed: 4g; preferred: none
| allowed: 2g, 4g; preferred: 4g
| allowed: 2g, 4g; preferred: 2g
| current: allowed: 2g, 4g; preferred: 4g
--------------------------------
Bands | supported: egsm, dcs, pcs, g850, eutran-1,
eutran-2, eutran-3,
| eutran-4, eutran-5, eutran-8, eutran-12,
eutran-13, eutran-17,
| eutran-18, eutran-19, eutran-20,
eutran-39
| current: egsm, dcs, pcs, g850, eutran-1,
eutran-2, eutran-3,
| eutran-4, eutran-5, eutran-8, eutran-12,
eutran-13, eutran-17,
| eutran-18, eutran-19, eutran-20,
eutran-39
--------------------------------
IP | supported: ipv4, ipv6, ipv4v6
--------------------------------
3GPP | imei: 862061043536548
| operator id: 20404
| registration: roaming
--------------------------------
3GPP EPS | ue mode of operation: csps-2
--------------------------------
SIM | dbus path: /org/freedesktop/ModemManager1/SIM/0
--------------------------------
Bearer | dbus path: /org/freedesktop/ModemManager1/Bearer/0
*We have added a connection to the APN via:*
# nmcli c add \
> type gsm \
> ifname "cdc-wdm0" \
> apn "vf-viriciti" \
> gsm.number "*99***1#" \
> gsm.pin "0000"
Connection 'gsm-cdc-wdm0' (87994115-cbd9-48c5-b2a3-71000180722e)
successfully added.
*The specifications of the connection:*
# nmcli c show id gsm-cdc-wdm0
connection.id: gsm-cdc-wdm0
connection.uuid:
87994115-cbd9-48c5-b2a3-71000180722e
connection.stable-id: --
connection.type: gsm
connection.interface-name: cdc-wdm0
connection.autoconnect: yes
connection.autoconnect-priority: 0
connection.autoconnect-retries: -1 (default)
connection.multi-connect: 0 (default)
connection.auth-retries: -1
connection.timestamp: 1571947581
connection.read-only: no
connection.permissions: --
connection.zone: --
connection.master: --
connection.slave-type: --
connection.autoconnect-slaves: -1 (default)
connection.secondaries: --
connection.gateway-ping-timeout: 0
connection.metered: unknown
connection.lldp: default
connection.mdns: -1 (default)
connection.llmnr: -1 (default)
ipv4.method: auto
ipv4.dns: --
ipv4.dns-search: --
ipv4.dns-options: ""
ipv4.dns-priority: 0
ipv4.addresses: --
ipv4.gateway: --
ipv4.routes: --
ipv4.route-metric: -1
ipv4.route-table: 0 (unspec)
ipv4.routing-rules: --
ipv4.ignore-auto-routes: no
ipv4.ignore-auto-dns: no
ipv4.dhcp-client-id: --
ipv4.dhcp-timeout: 0 (default)
ipv4.dhcp-send-hostname: yes
ipv4.dhcp-hostname: --
ipv4.dhcp-fqdn: --
ipv4.never-default: no
ipv4.may-fail: yes
ipv4.dad-timeout: -1 (default)
ipv6.method: auto
ipv6.dns: --
ipv6.dns-search: --
ipv6.dns-options: ""
ipv6.dns-priority: 0
ipv6.addresses: --
ipv6.gateway: --
ipv6.routes: --
ipv6.route-metric: -1
ipv6.route-table: 0 (unspec)
ipv6.routing-rules: --
ipv6.ignore-auto-routes: no
ipv6.ignore-auto-dns: no
ipv6.never-default: no
ipv6.may-fail: yes
ipv6.ip6-privacy: -1 (unknown)
ipv6.addr-gen-mode: stable-privacy
ipv6.dhcp-duid: --
ipv6.dhcp-send-hostname: yes
ipv6.dhcp-hostname: --
ipv6.token: --
gsm.number: *99***1#
gsm.username: --
gsm.password: <hidden>
gsm.password-flags: 0 (none)
gsm.apn: vf-viriciti
gsm.network-id: --
gsm.pin: <hidden>
gsm.pin-flags: 0 (none)
gsm.home-only: no
gsm.device-id: --
gsm.sim-id: --
gsm.sim-operator-id: --
gsm.mtu: auto
proxy.method: none
proxy.browser-only: no
proxy.pac-url: --
proxy.pac-script: --
GENERAL.NAME <http://general.name/>: gsm-cdc-wdm0
GENERAL.UUID:
87994115-cbd9-48c5-b2a3-71000180722e
GENERAL.DEVICES: cdc-wdm0
GENERAL.STATE: activated
GENERAL.DEFAULT: no
GENERAL.DEFAULT6: no
GENERAL.SPEC-OBJECT: --
GENERAL.VPN: no
GENERAL.DBUS-PATH:
/org/freedesktop/NetworkManager/ActiveConnection/6
GENERAL.CON-PATH:
/org/freedesktop/NetworkManager/Settings/5
GENERAL.ZONE: --
GENERAL.MASTER-PATH: --
IP4.ADDRESS[1]: 10.141.0.108/29
IP4.GATEWAY: 10.141.0.109
IP4.ROUTE[1]: dst = 10.141.0.104/29, nh =
0.0.0.0, mt = 700
IP4.ROUTE[2]: dst = 0.0.0.0/0, nh =
10.141.0.109, mt = 700
IP4.DNS[1]: 10.1.2.199
IP4.DNS[2]: 10.1.2.200
IP6.GATEWAY: --
*After the connection becomes active, the wwan0 interface comes up and we
get an IP from the gateway.*
# ifconfig
wwan0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1500
inet 10.141.0.108 netmask 255.255.255.248 destination 10.141.0.108
unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen
1000 (UNSPEC)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 8 bytes 397 (397.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
*But this is where it ends. We can only receive data but we cannot transmit
data. We have tried TCP, UDP and ICMP packets.*
*While pinging our device, the host PC outputs:*
# ping 10.141.0.108
PING 10.141.0.108 (10.141.0.108): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3
*The device itself, outputs:*
#tcpdump -vi wwan0
tcpdump: listening on wwan0, link-type RAW (Raw IP), capture size 262144
bytes
20:37:42.756650 IP (tos 0x0, ttl 251, id 19993, offset 0, flags [none],
proto ICMP (1), length 84) 10.1.0.41 > 10.141.0.108: ICMP echo request, id
62574, seq 0, length 64
20:37:42.797093 IP (tos 0x0, ttl 251, id 14636, offset 0, flags [none],
proto ICMP (1), length 84) 10.1.0.41 > 10.141.0.108: ICMP echo request, id
62574, seq 1, length 64
20:37:42.797103 IP (tos 0x0, ttl 251, id 64676, offset 0, flags [none],
proto ICMP (1), length 84) 10.1.0.41 > 10.141.0.108: ICMP echo request, id
62574, seq 2, length 64
20:37:43.517041 IP (tos 0x0, ttl 251, id 23802, offset 0, flags [none],
proto ICMP (1), length 84) 10.1.0.41 > 10.141.0.108: ICMP echo request, id
62574, seq 3, length 64
*Best regards,*
*Simon*
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