连接EC20模块

root@firefly:/dev# lsusb
Bus 008 Device 005: ID 05e3:0620 Genesys Logic, Inc. USB3.0 Hub
Bus 008 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 007 Device 007: ID 0fe6:9900 ICS Advent 
Bus 007 Device 006: ID 2c7c:0125 Quectel Wireless Solutions Co., Ltd. EC25 LTE modem
Bus 007 Device 005: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 007 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

root@firefly:/dev# quectel-CM 
[11-03_16:33:19:289] QConnectManager_Linux_V1.6.1
[11-03_16:33:19:293] Find /sys/bus/usb/devices/7-1.3 idVendor=0x2c7c idProduct=0x125, bus=0x007, dev=0x006
[11-03_16:33:19:294] Auto find qmichannel = /dev/cdc-wdm0
[11-03_16:33:19:294] Auto find usbnet_adapter = wwan0
[11-03_16:33:19:295] netcard driver = qmi_wwan_q, driver version = 22-Aug-2005
[11-03_16:33:19:295] Modem works in QMI mode
[11-03_16:33:19:323] cdc_wdm_fd = 7
[11-03_16:33:19:393] Get clientWDS = 7
[11-03_16:33:19:425] Get clientDMS = 1
[11-03_16:33:19:457] Get clientNAS = 2
[11-03_16:33:19:489] Get clientUIM = 1
[11-03_16:33:19:521] Get clientWDA = 1
[11-03_16:33:19:553] requestBaseBandVersion EC20CEFILGR06A07M1G
[11-03_16:33:19:681] requestGetSIMStatus SIMStatus: SIM_ABSENT
[11-03_16:33:19:713] requestGetProfile[1] ///0/IPV4V6
[11-03_16:33:19:745] requestRegistrationState2 MCC: 460, MNC: 1, PS: Detached, DataCap: UNKNOW
[11-03_16:33:19:777] requestQueryDataCall IPv4ConnectionStatus: DISCONNECTED
[11-03_16:33:19:778] ifconfig wwan0 0.0.0.0
[11-03_16:33:19:792] ifconfig wwan0