Connection with LTE modem Quectel EM05-G undet linux with T-Mobile

IoT Modules LTE Standard Module
21

Please show the

route -n

22 
ip route
default via 10.190.42.137 dev wwp195s0f3u4 
10.190.42.128/28 dev wwp195s0f3u4 proto kernel scope link src 10.190.42.136
23

OK I see.

[03-26_12:43:27:027] /proc/62467/fd/7 → /dev/cdc-wdm0
[03-26_12:43:27:027] /proc/62467/exe → /usr/libexec/mbim-proxy

Make sure the ModemManager is stopped.

If so, please check the AT command and test whether modem could ping the 8.8.8.8.

Do not start the ModemManager and quectel-CM. Just try the AT command

AT+CGDCONT=1,“IP”,“internet.t-mobile.cz”
AT+QIACT=1
AT+QIACT?
AT+QPING=1,“8.8.8.8”

24 
socat - /dev/ttyUSB0,crnl
AT+CGDCONT=1,"IP","internet.t-mobile.cz"

OK
AT+QIACT=1

ERROR
AT+QIACT?

+QIACT: 1,1,1,"100.78.1.13"

OK
AT+QPING=1,"8.8.8.8"

OK

+QPING: 0,"8.8.8.8",32,35,255

+QPING: 0,"8.8.8.8",32,24,255

+QPING: 0,"8.8.8.8",32,25,255

+QPING: 0,"8.8.8.8",32,30,255

+QPING: 0,4,4,0,24,35,27

i accidently run quectel-CM again, so IP has changed
but it seems that QPING is working?

25

Yes. QPING is working and it means that at least there is no problem with the SIM card.

26

quectel-CM -s internet.t-mobile.cz -n 1

fix it with cid 1.

27 
quectel-CM -s internet.t-mobile.cz -n 1
[03-26_13:46:43:733] QConnectManager_Linux_V1.6.5.1
[03-26_13:46:43:734] Find /sys/bus/usb/devices/1-4 idVendor=0x2c7c idProduct=0x30a, bus=0x001, dev=0x006
[03-26_13:46:43:734] Auto find qmichannel = /dev/cdc-wdm0
[03-26_13:46:43:734] Auto find usbnet_adapter = wwp195s0f3u4
[03-26_13:46:43:734] netcard driver = cdc_mbim, driver version = 6.6.10-gentoo-minimal
[03-26_13:46:43:734] Modem works in MBIM mode
[03-26_13:46:43:752] /proc/197775/fd/7 -> /dev/cdc-wdm0
[03-26_13:46:43:752] /proc/197775/exe -> /usr/libexec/mbim-proxy
[03-26_13:46:45:754] cdc_wdm_fd = 7
[03-26_13:46:45:754] mbim_open_device()
[03-26_13:46:45:851] mbim_device_caps_query()
[03-26_13:46:45:882] DeviceId:     016176006002208
[03-26_13:46:45:882] FirmwareInfo: EM05GFAR07A07M1G
[03-26_13:46:45:882] HardwareInfo: QUECTEL Mobile Broadband Modul
[03-26_13:46:45:882] mbim_device_services_query()
[03-26_13:46:45:916] mbim_set_radio_state( 1 )
[03-26_13:46:45:947] HwRadioState: 1, SwRadioState: 1
[03-26_13:46:45:947] mbim_subscriber_status_query()
[03-26_13:46:45:979] SubscriberId: 230015010603460
[03-26_13:46:45:979] SimIccId:     8942001240298835147F
[03-26_13:46:45:979] SubscriberReadyState NotInitialized -> Initialized 
[03-26_13:46:45:979] mbim_register_state_query()
[03-26_13:46:46:011] RegisterState Unknown -> Home 
[03-26_13:46:46:011] mbim_packet_service_query()
[03-26_13:46:46:042] PacketServiceState Unknown -> Attached 
[03-26_13:46:46:042] mbim_query_connect(sessionID=0)
[03-26_13:46:46:075] ActivationState Unknown -> Deactivated 
[03-26_13:46:46:075] ip addr flush dev wwp195s0f3u4
[03-26_13:46:46:077] ip link set dev wwp195s0f3u4 down
[03-26_13:46:46:079] mbim_set_connect(onoff=1, sessionID=0)
[03-26_13:46:46:139] ActivationState Deactivated -> Activated 
[03-26_13:46:46:139] mbim_ip_config(sessionID=0)
[03-26_13:46:46:170] < SessionId = 0
[03-26_13:46:46:171] < IPv4ConfigurationAvailable = 0xf
[03-26_13:46:46:171] < IPv6ConfigurationAvailable = 0x0
[03-26_13:46:46:171] < IPv4AddressCount = 0x1
[03-26_13:46:46:171] < IPv4AddressOffset = 0x3c
[03-26_13:46:46:171] < IPv6AddressCount = 0x0
[03-26_13:46:46:171] < IPv6AddressOffset = 0x0
[03-26_13:46:46:171] < IPv4 = 100.79.186.183/28
[03-26_13:46:46:171] < gw = 100.79.186.184
[03-26_13:46:46:171] < dns1 = 62.141.16.177
[03-26_13:46:46:171] < dns2 = 62.141.16.161
[03-26_13:46:46:171] < ipv4 mtu = 1500
[03-26_13:46:46:202] ip link set dev wwp195s0f3u4 up
[03-26_13:46:46:205] ip -4 address flush dev wwp195s0f3u4
[03-26_13:46:46:207] ip -4 address add 100.79.186.183/28 dev wwp195s0f3u4
[03-26_13:46:46:208] ip -4 route add default via 100.79.186.184 dev wwp195s0f3u4

and result from ip command

ip a
3: wwp195s0f3u4: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
    link/ether d6:58:48:d7:4d:76 brd ff:ff:ff:ff:ff:ff
    inet 100.79.186.183/28 scope global wwp195s0f3u4
       valid_lft forever preferred_lft forever

ip route
default via 100.79.186.184 dev wwp195s0f3u4 
100.79.186.176/28 dev wwp195s0f3u4 proto kernel scope link src 100.79.186.183 

ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
^C
--- 8.8.8.8 ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 4111ms
28

There is some process that has open the /dev/cdc-wdm0.

[03-26_13:46:43:752] /proc/197775/fd/7 -> /dev/cdc-wdm0
[03-26_13:46:43:752] /proc/197775/exe -> /usr/libexec/mbim-proxy
29

If it still doesn’t work. Maybe you could try any other solution such at qmi.

30

weird, tryied again and output is without such lines

quectel-CM -s internet.t-mobile.cz -n 1
[03-26_14:16:31:960] QConnectManager_Linux_V1.6.5.1
[03-26_14:16:31:961] Find /sys/bus/usb/devices/1-4 idVendor=0x2c7c idProduct=0x30a, bus=0x001, dev=0x006
[03-26_14:16:31:961] Auto find qmichannel = /dev/cdc-wdm0
[03-26_14:16:31:961] Auto find usbnet_adapter = wwp195s0f3u4
[03-26_14:16:31:961] netcard driver = cdc_mbim, driver version = 6.6.10-gentoo-minimal
[03-26_14:16:31:961] Modem works in MBIM mode
[03-26_14:16:31:984] cdc_wdm_fd = 7
[03-26_14:16:31:984] mbim_open_device()
[03-26_14:16:32:068] mbim_device_caps_query()
[03-26_14:16:32:101] DeviceId:     016176006002208
[03-26_14:16:32:101] FirmwareInfo: EM05GFAR07A07M1G
[03-26_14:16:32:101] HardwareInfo: QUECTEL Mobile Broadband Modul
[03-26_14:16:32:101] mbim_device_services_query()
[03-26_14:16:32:132] mbim_set_radio_state( 1 )
[03-26_14:16:32:164] HwRadioState: 1, SwRadioState: 1
[03-26_14:16:32:164] mbim_subscriber_status_query()
[03-26_14:16:32:197] SubscriberId: 230015010603460
[03-26_14:16:32:197] SimIccId:     8942001240298835147F
[03-26_14:16:32:197] SubscriberReadyState NotInitialized -> Initialized 
[03-26_14:16:32:197] mbim_register_state_query()
[03-26_14:16:32:229] RegisterState Unknown -> Home 
[03-26_14:16:32:229] mbim_packet_service_query()
[03-26_14:16:32:261] PacketServiceState Unknown -> Attached 
[03-26_14:16:32:261] mbim_query_connect(sessionID=0)
[03-26_14:16:32:292] ActivationState Unknown -> Deactivated 
[03-26_14:16:32:292] ip addr flush dev wwp195s0f3u4
[03-26_14:16:32:294] ip link set dev wwp195s0f3u4 down
[03-26_14:16:32:296] mbim_set_connect(onoff=1, sessionID=0)
[03-26_14:16:32:357] ActivationState Deactivated -> Activated 
[03-26_14:16:32:357] mbim_ip_config(sessionID=0)
[03-26_14:16:32:390] < SessionId = 0
[03-26_14:16:32:390] < IPv4ConfigurationAvailable = 0xf
[03-26_14:16:32:390] < IPv6ConfigurationAvailable = 0x0
[03-26_14:16:32:390] < IPv4AddressCount = 0x1
[03-26_14:16:32:390] < IPv4AddressOffset = 0x3c
[03-26_14:16:32:390] < IPv6AddressCount = 0x0
[03-26_14:16:32:390] < IPv6AddressOffset = 0x0
[03-26_14:16:32:390] < IPv4 = 100.84.247.228/29
[03-26_14:16:32:390] < gw = 100.84.247.229
[03-26_14:16:32:390] < dns1 = 62.141.16.161
[03-26_14:16:32:390] < dns2 = 62.141.16.177
[03-26_14:16:32:390] < ipv4 mtu = 1500
[03-26_14:16:32:421] ip link set dev wwp195s0f3u4 up
[03-26_14:16:32:423] ip -4 address flush dev wwp195s0f3u4
[03-26_14:16:32:426] ip -4 address add 100.84.247.228/29 dev wwp195s0f3u4
[03-26_14:16:32:427] ip -4 route add default via 100.84.247.229 dev wwp195s0f3u4

ip a
3: wwp195s0f3u4: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
    link/ether d6:58:48:d7:4d:76 brd ff:ff:ff:ff:ff:ff
    inet 100.84.247.228/29 scope global wwp195s0f3u4
       valid_lft forever preferred_lft forever

ip route
default via 100.84.247.229 dev wwp195s0f3u4 
100.84.247.224/29 dev wwp195s0f3u4 proto kernel scope link src 100.84.247.228 

ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
^C
--- 8.8.8.8 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1025ms
31

unfortunately i dont know much about this, how to switch to qmi?
also weird is for me that it was working three days ago, and hasn’t since…

32

Make sure there is no any other process then try the quectel-CM. You do not follow what I requst.

To set the modem to QMI way:

AT+QCFG=“usbnet”,0

33

I am sure that ModemManager service is stopped, i think that no other process is accessing modem device

socat - /dev/ttyUSB0,crnl
AT+QCFG="usbnet",0

OK

but quectel-CM is not running anymore, because /dev/cdc-wdm0 not exists
i tryied to reboot laptop, but it not helped

quectel-CM -s internet.t-mobile.cz -n 1
[03-27_09:38:54:281] QConnectManager_Linux_V1.6.5.1
[03-27_09:38:54:283] Find /sys/bus/usb/devices/1-4 idVendor=0x2c7c idProduct=0x30a, bus=0x001, dev=0x02b
[03-27_09:38:54:285] network interface '' or qmidev '' is not exist
[03-27_09:38:54:285] atdevice_detect failed
[03-27_09:38:54:285] qmidevice_detect failed
34

please show the

cat /sys/kernel/debug/usb/devices

35 
T:  Bus=01 Lev=01 Prnt=01 Port=03 Cnt=04 Dev#= 10 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=2c7c ProdID=030a Rev= 3.18
S:  Manufacturer=Quectel
S:  Product=Quectel EM05-G
C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr=500mA
A:  FirstIf#= 7 IfCount= 2 Cls=02(comm.) Sub=06 Prot=00
I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E:  Ad=82(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 7 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver=cdc_ether
E:  Ad=84(I) Atr=03(Int.) MxPS=  16 Ivl=32ms
I:  If#= 8 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
I:* If#= 8 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
E:  Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
36

Are you sure that you have set the modem with

AT+QCFG=“usbnet”,0

Please check

AT+QCFG=“usbnet”

I guess that you have set it to 1.
And there should be an network interface that has got IP like 192.168.225.x

You can check whether it works.

37 
socat - /dev/ttyUSB0,crnl
AT+QCFG="usbnet"  
AT+QCFG="usbnet"


+QCFG: "usbnet",0



OK




ERROR

but no network device for modem exists

howto set previous configuration, to have /dev/cdc-wdm0 device?

38

Previous it is 2.
AT+QCFG=“usbnet”,2 // MBIM mode

39

it seems that AT+QCFG=“usbnet”,2 and laptop reboot did something

it started working again

quectel-CM -s internet.t-mobile.cz 
[03-27_10:18:32:117] QConnectManager_Linux_V1.6.5.1
[03-27_10:18:32:118] Find /sys/bus/usb/devices/1-4 idVendor=0x2c7c idProduct=0x30a, bus=0x001, dev=0x005
[03-27_10:18:32:119] Auto find qmichannel = /dev/cdc-wdm0
[03-27_10:18:32:119] Auto find usbnet_adapter = wwp195s0f3u4
[03-27_10:18:32:119] netcard driver = cdc_mbim, driver version = 6.6.10-gentoo-minimal
[03-27_10:18:32:119] Modem works in MBIM mode
[03-27_10:18:32:127] /proc/2409/fd/7 -> /dev/cdc-wdm0
[03-27_10:18:32:127] /proc/2409/exe -> /usr/libexec/mbim-proxy
[03-27_10:18:34:128] cdc_wdm_fd = 7
[03-27_10:18:34:129] mbim_open_device()
[03-27_10:18:34:221] mbim_device_caps_query()
[03-27_10:18:34:251] DeviceId:     016176006002208
[03-27_10:18:34:251] FirmwareInfo: EM05GFAR07A07M1G
[03-27_10:18:34:251] HardwareInfo: QUECTEL Mobile Broadband Modul
[03-27_10:18:34:251] mbim_device_services_query()
[03-27_10:18:34:284] mbim_set_radio_state( 1 )
[03-27_10:18:34:315] HwRadioState: 1, SwRadioState: 1
[03-27_10:18:34:315] mbim_subscriber_status_query()
[03-27_10:18:34:380] SubscriberId: 230015010603460
[03-27_10:18:34:381] SimIccId:     8942001240298835147F
[03-27_10:18:34:381] SubscriberReadyState NotInitialized -> Initialized 
[03-27_10:18:34:381] mbim_register_state_query()
[03-27_10:18:34:412] RegisterState Unknown -> Home 
[03-27_10:18:34:412] mbim_packet_service_query()
[03-27_10:18:34:443] PacketServiceState Unknown -> Attached 
[03-27_10:18:34:443] mbim_query_connect(sessionID=0)
[03-27_10:18:34:474] ActivationState Unknown -> Deactivated 
[03-27_10:18:34:475] ip addr flush dev wwp195s0f3u4
[03-27_10:18:34:490] ip link set dev wwp195s0f3u4 down
[03-27_10:18:34:492] mbim_set_connect(onoff=1, sessionID=0)
[03-27_10:18:34:572] ActivationState Deactivated -> Activated 
[03-27_10:18:34:572] mbim_ip_config(sessionID=0)
[03-27_10:18:34:603] < SessionId = 0
[03-27_10:18:34:603] < IPv4ConfigurationAvailable = 0xf
[03-27_10:18:34:603] < IPv6ConfigurationAvailable = 0x0
[03-27_10:18:34:603] < IPv4AddressCount = 0x1
[03-27_10:18:34:603] < IPv4AddressOffset = 0x3c
[03-27_10:18:34:603] < IPv6AddressCount = 0x0
[03-27_10:18:34:603] < IPv6AddressOffset = 0x0
[03-27_10:18:34:603] < IPv4 = 100.98.220.7/28
[03-27_10:18:34:603] < gw = 100.98.220.8
[03-27_10:18:34:603] < dns1 = 62.141.16.177
[03-27_10:18:34:603] < dns2 = 62.141.16.161
[03-27_10:18:34:603] < ipv4 mtu = 1500
[03-27_10:18:34:635] ip link set dev wwp195s0f3u4 up
[03-27_10:18:34:637] ip -4 address flush dev wwp195s0f3u4
[03-27_10:18:34:639] ip -4 address add 100.98.220.7/28 dev wwp195s0f3u4
[03-27_10:18:34:640] ip -4 route add default via 100.98.220.8 dev wwp195s0f3u4

and IP

ip a
3: wwp195s0f3u4: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
    link/ether d6:58:48:d7:4d:76 brd ff:ff:ff:ff:ff:ff
    inet 100.98.220.7/28 scope global wwp195s0f3u4
       valid_lft forever preferred_lft forever
    inet6 fe80::d458:48ff:fed7:4d76/64 scope link proto kernel_ll 
       valid_lft forever preferred_lft forever

ip route
default via 100.98.220.8 dev wwp195s0f3u4 
100.98.220.0/28 dev wwp195s0f3u4 proto kernel scope link src 100.98.220.7 

ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=120 time=145 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=120 time=23.5 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=120 time=23.4 ms
64 bytes from 8.8.8.8: icmp_seq=4 ttl=120 time=22.4 ms
64 bytes from 8.8.8.8: icmp_seq=5 ttl=120 time=23.3 ms
64 bytes from 8.8.8.8: icmp_seq=6 ttl=120 time=20.4 ms
^C
--- 8.8.8.8 ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5010ms
rtt min/avg/max/mdev = 20.370/42.927/144.562/45.465 ms
40

That’s interesting.
Maybe the previous setting is not 2.
Please help to check:

AT+QCFG=?