EC20/EC25 connection issue

IoT Modules LTE Standard Module
1

Hi,

This is my first time to use Quectel modules.
I’m working on an EC20 LTE module (at least this is what it prints on the metal cover) with NanoPi Neo Core. I followed the steps provided by FriendlyElec here. When I started the tool, it can’t connect to the Internet. Here is the output.

$ sudo quectel-CM
[07-27_10:29:16:997] WCDMA&LTE_QConnectManager_Linux&Android_V1.1.34
[07-27_10:29:16:998] quectel-CM profile[1] = (null)/(null)/(null)/0, pincode = (null)
[07-27_10:29:17:000] Find /sys/bus/usb/devices/4-1 idVendor=2c7c idProduct=0125
[07-27_10:29:17:000] Find /sys/bus/usb/devices/4-1:1.4/net/wwan0
[07-27_10:29:17:000] Find usbnet_adapter = wwan0
[07-27_10:29:17:000] Find /sys/bus/usb/devices/4-1:1.4/usbmisc/cdc-wdm0
[07-27_10:29:17:000] Find qmichannel = /dev/cdc-wdm0
[07-27_10:29:17:017] cdc_wdm_fd = 7
[07-27_10:29:17:093] Get clientWDS = 1
[07-27_10:29:17:126] Get clientDMS = 1
[07-27_10:29:17:158] Get clientNAS = 2
[07-27_10:29:17:190] Get clientUIM = 1
[07-27_10:29:17:222] Get clientWDA = 1
[07-27_10:29:17:253] requestBaseBandVersion EC20CEHCLGR06A01M1G_AUD
[07-27_10:29:17:350] requestGetSIMStatus SIMStatus: SIM_READY
[07-27_10:29:17:382] requestGetProfile[1] ///0
[07-27_10:29:17:414] requestRegistrationState2 MCC: 466, MNC: 89, PS: Attached, DataCap: LTE
[07-27_10:29:17:445] requestQueryDataCall IPv4ConnectionStatus: DISCONNECTED
[07-27_10:29:17:509] requestRegistrationState2 MCC: 466, MNC: 89, PS: Attached, DataCap: LTE
[07-27_10:29:17:541] requestSetupDataCall WdsConnectionIPv4Handle: 0x86ad1310
[07-27_10:29:17:605] requestQueryDataCall IPv4ConnectionStatus: CONNECTED
[07-27_10:29:17:638] ifconfig wwan0 up
[07-27_10:29:17:647] busybox udhcpc -f -n -q -t 5 -i wwan0
udhcpc: started, v1.30.1
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: no lease, failing
^C[07-27_10:29:38:628] ifconfig wwan0 down
[07-27_10:29:38:823] QmiWwanThread exit
[07-27_10:29:38:824] main exit

And the log from /var/log/syslog.

Jul 27 10:29:17 master udhcpc[20824]: wwan0: deconfigured
Jul 27 10:29:17 master kernel: [ 3453.841689] qmi_wwan 4-1:1.4: skb h_proto is 0000
Jul 27 10:29:17 master kernel: [ 3453.846429] qmi_wwan 4-1:1.4: Packet Dropped
Jul 27 10:29:20 master kernel: [ 3456.896861] qmi_wwan 4-1:1.4: skb h_proto is 0000
Jul 27 10:29:20 master kernel: [ 3456.901579] qmi_wwan 4-1:1.4: Packet Dropped
Jul 27 10:29:23 master kernel: [ 3459.957033] qmi_wwan 4-1:1.4: skb h_proto is 0000
Jul 27 10:29:23 master kernel: [ 3459.961751] qmi_wwan 4-1:1.4: Packet Dropped
Jul 27 10:29:26 master kernel: [ 3463.017220] qmi_wwan 4-1:1.4: skb h_proto is 0000
Jul 27 10:29:26 master kernel: [ 3463.021953] qmi_wwan 4-1:1.4: Packet Dropped
Jul 27 10:29:30 master kernel: [ 3466.097379] qmi_wwan 4-1:1.4: skb h_proto is 0000
Jul 27 10:29:30 master kernel: [ 3466.102095] qmi_wwan 4-1:1.4: Packet Dropped
Jul 27 10:29:33 master udhcpc[20824]: wwan0: configuration failed: leasefail:

I’ve searched the forum with similar issues but still have no idea what I can do next.

Another thing that also confuses me. On the metal cover of the module, it marks “EC20”, but when I check the connected USB device, it shows “EC25”. I’m not sure if it makes any difference though.

$ lsusb
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 2c7c:0125 Quectel Wireless Solutions Co., Ltd. EC25 LTE modem
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 009 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
2

Hi,

Even I’m facing the exact same issue with Quectel’s EC20 LTE modem. I followed the same steps for my NanoPi Neo Air and everytime I get the “Packet dropped” error.

3

Hi, how did you manage to solve the issue? I have a similar one with EC25 module and NanoPi NeoCore.

root@NanoPi-NEO-Core:/home/pi# sudo quectel-CM &
[1] 1256
root@NanoPi-NEO-Core:/home/pi# [04-14_09:10:44:547] WCDMA&LTE_QConnectManager_Linux&Android_V1.1.34
[04-14_09:10:44:547] quectel-CM profile[1] = (null)/(null)/(null)/0, pincode = (null)
[04-14_09:10:44:551] Find /sys/bus/usb/devices/4-1 idVendor=2c7c idProduct=0125
[04-14_09:10:44:551] Find /sys/bus/usb/devices/4-1:1.4/net/wwan0
[04-14_09:10:44:551] Find usbnet_adapter = wwan0
[04-14_09:10:44:551] Find /sys/bus/usb/devices/4-1:1.4/usbmisc/cdc-wdm0
[04-14_09:10:44:551] Find qmichannel = /dev/cdc-wdm0
[04-14_09:10:44:569] /proc/941/fd/7 -> /dev/cdc-wdm0
[04-14_09:10:44:569] /proc/941/exe -> /usr/libexec/qmi-proxy
[04-14_09:10:46:575] cdc_wdm_fd = 7
[04-14_09:10:46:670] Get clientWDS = 20
[04-14_09:10:46:702] Get clientDMS = 1
[04-14_09:10:46:733] Get clientNAS = 4
[04-14_09:10:46:765] Get clientUIM = 1
[04-14_09:10:46:799] Get clientWDA = 1
[04-14_09:10:46:830] requestBaseBandVersion EC25EUGAR06A03M4G
[04-14_09:10:46:925] requestGetSIMStatus SIMStatus: SIM_READY
[04-14_09:10:46:959] requestGetProfile[1] internet///0
[04-14_09:10:46:990] requestRegistrationState2 MCC: 260, MNC: 3, PS: Attached, DataCap: LTE
[04-14_09:10:47:021] requestQueryDataCall IPv4ConnectionStatus: DISCONNECTED
[04-14_09:10:47:085] requestRegistrationState2 MCC: 260, MNC: 3, PS: Attached, DataCap: LTE
[04-14_09:10:47:149] requestSetupDataCall WdsConnectionIPv4Handle: 0x872008e0
[04-14_09:10:47:213] requestQueryDataCall IPv4ConnectionStatus: CONNECTED
[04-14_09:10:47:246] ifconfig wwan0 up
[04-14_09:10:47:272] busybox udhcpc -f -n -q -t 5 -i wwan0
udhcpc: started, v1.30.1
udhcpc: sending discover
udhcpc: sending select for 10.20.51.170
udhcpc: lease of 10.20.51.170 obtained, lease time 7200
[04-14_09:11:19:118] requestRegistrationState2 MCC: 260, MNC: 3, PS: Attached, DataCap: LTE
[  340.145586] qmi_wwan 4-1:1.4: skb h_proto is 0806
[  340.150383] qmi_wwan 4-1:1.4: Packet Dropped
[  341.176435] qmi_wwan 4-1:1.4: skb h_proto is 0806
[  341.181201] qmi_wwan 4-1:1.4: Packet Dropped
[  342.216434] qmi_wwan 4-1:1.4: skb h_proto is 0806
[  342.221201] qmi_wwan 4-1:1.4: Packet Dropped
[  343.257083] qmi_wwan 4-1:1.4: skb h_proto is 0806
[  343.261852] qmi_wwan 4-1:1.4: Packet Dropped
[  344.296427] qmi_wwan 4-1:1.4: skb h_proto is 0806
[  344.301194] qmi_wwan 4-1:1.4: Packet Dropped
[  345.336425] qmi_wwan 4-1:1.4: skb h_proto is 0806
[  345.341189] qmi_wwan 4-1:1.4: Packet Dropped
[  346.377120] qmi_wwan 4-1:1.4: skb h_proto is 0806
[  346.381907] qmi_wwan 4-1:1.4: Packet Dropped
[  347.416427] qmi_wwan 4-1:1.4: skb h_proto is 0806
[  347.421195] qmi_wwan 4-1:1.4: Packet Dropped
[  348.456427] qmi_wwan 4-1:1.4: skb h_proto is 0806
[  348.461199] qmi_wwan 4-1:1.4: Packet Dropped
[  349.497134] qmi_wwan 4-1:1.4: skb h_proto is 0806
[  349.501920] qmi_wwan 4-1:1.4: Packet Dropped
[  350.536417] qmi_wwan 4-1:1.4: skb h_proto is 0806
[  350.541208] qmi_wwan 4-1:1.4: Packet Dropped
4

Has there been a resolution on this? I’m having the same issue with RM520N-GL.