test environment: Ubuntu 18.04 LTS for PC
the following is the command and return I executed:
$ sudo ./quectel-CM &
[10-28_10:23:48:643] WCDMA<E_QConnectManager_Linux&Android_V1.1.45
[10-28_10:23:48:644] ./quectel-CM profile[1] = (null)/(null)/(null)/0, pincode = (null)
[10-28_10:23:48:644] Find /sys/bus/usb/devices/1-4.4 idVendor=2c7c idProduct=0125
[10-28_10:23:48:644] Find /sys/bus/usb/devices/1-4.4:1.4/net/wwp0s20u4u4i4
[10-28_10:23:48:644] Find usbnet_adapter = wwp0s20u4u4i4
[10-28_10:23:48:645] Find /sys/bus/usb/devices/1-4.4:1.4/usbmisc/cdc-wdm0
[10-28_10:23:48:645] Find qmichannel = /dev/cdc-wdm0
[10-28_10:23:48:675] cdc_wdm_fd = 7
[10-28_10:23:48:780] Get clientWDS = 18
[10-28_10:23:48:812] Get clientDMS = 1
[10-28_10:23:48:843] Get clientNAS = 3
[10-28_10:23:48:875] Get clientUIM = 1
[10-28_10:23:48:907] Get clientWDA = 1
[10-28_10:23:48:939] requestBaseBandVersion EC20CEHCR06A04M1G
[10-28_10:23:49:068] requestGetSIMStatus SIMStatus: SIM_READY
[10-28_10:23:49:100] requestGetProfile[1] ctnet/vnet@mycdma.cn/vnet.mobi/2
[10-28_10:23:49:132] requestRegistrationState2 MCC: 460, MNC: 11, PS: Attached, DataCap: LTE
[10-28_10:23:49:163] requestQueryDataCall IPv4ConnectionStatus: DISCONNECTED
[10-28_10:23:49:227] requestRegistrationState2 MCC: 460, MNC: 11, PS: Attached, DataCap: LTE
[10-28_10:23:49:259] requestSetupDataCall WdsConnectionIPv4Handle: 0x86bf8fe0
[10-28_10:23:49:324] requestQueryDataCall IPv4ConnectionStatus: CONNECTED
[10-28_10:23:49:355] ifconfig wwp0s20u4u4i4 up
[10-28_10:23:49:362] busybox udhcpc -f -n -q -t 5 -i wwp0s20u4u4i4
udhcpc: started, v1.27.2
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: no lease, failing
$ sudo echo -e “AT+CGPADDR\r\n” > /dev/ttyUSB2
AAT+CGPADDR
+CGPADDR: 1,“10.146.4.206”
+CGPADDR: 2,“0.0.0.0,0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 6,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 7,“0.0.0.0”
+CGPADDR: 8,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 9,“0.0.0.0”
OK
AT+C
ERROR
AT+C
ERROR