USB 3G Dongle - Storage vs Modem Mode

ckleea

大部分 USB 手指都用在 Windows 系统上，所以好多时 default 是 USB Storage Mode

当插入 Windows 时会 detect as USB CD，然後 auto run setup，转到 modem mode 供 3G 上网。

但在我们的 linux 或树莓派派上使用 chan_dongle，手指还是当作 CD，不能供上网用。

虽然有软件 usb_modeswitch 帮手转，  但次次在 command line 做真是不太方便。

最近上网拔到这方法，在 /etc/udev/rules.d 建立 50-usb-3gdongle.rules 这档案
当USB 手指插入时，系统会自动将Storage Mode转入modem mode

可见下面 dmesg 资讯

1. [ 5178.221029] ehci_irq: port change detect
   
2. [ 5178.497003] usb 1-1: new high-speed USB device number 3 using sw-ehci
   
3. [ 5178.659742] usb 1-1: New USB device found, idVendor=12d1, idProduct=140c
   
4. [ 5178.672865] usb 1-1: New USB device strings: Mfr=3, Product=2, SerialNumber=0
   
5. [ 5178.683546] usb 1-1: Product: HUAWEI Mobile
   
6. [ 5178.691860] usb 1-1: Manufacturer: HUAWEI Technology
   
7. [ 5178.703524] ====usb_stor_huawei_e220_init===>
   
8. [ 5178.708152] ====usb_stor_huawei_e220_init===>
   
9. [ 5178.727413] ehci_irq: port change detect
   
10. [ 5178.731448] usb 1-1: USB disconnect, device number 3
    
11. [ 5183.121657] ehci_irq: port change detect
    
12. [ 5183.407111] usb 1-1: new high-speed USB device number 4 using sw-ehci
    
13. [ 5183.569995] usb 1-1: New USB device found, idVendor=12d1, idProduct=140c
    
14. [ 5183.583216] usb 1-1: New USB device strings: Mfr=3, Product=2, SerialNumber=0
    
15. [ 5183.594039] usb 1-1: Product: HUAWEI Mobile
    
16. [ 5183.602356] usb 1-1: Manufacturer: HUAWEI Technology
    
17. [ 5183.617003] option 1-1:1.0: GSM modem (1-port) converter detected
    
18. [ 5183.629744] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB0
    
19. [ 5183.643902] option 1-1:1.2: GSM modem (1-port) converter detected
    
20. [ 5183.656634] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB1
    
21. [ 5183.669767] option 1-1:1.3: GSM modem (1-port) converter detected
    
22. [ 5183.682655] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB2
    
23. [ 5183.694342] ====usb_stor_huawei_e220_init===>
    
24. [ 5183.698882] ====usb_stor_huawei_e220_init===>
    
25. [ 5280.720043] ehci_irq: port change detect
    
26. [ 5280.724134] usb 1-1: USB disconnect, device number 4
    
27. [ 5280.740344] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
    
28. [ 5280.753140] option 1-1:1.0: device disconnected
    
29. [ 5280.768048] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
    
30. [ 5280.780286] option 1-1:1.2: device disconnected
    
31. [ 5280.794240] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
    
32. [ 5280.806860] option 1-1:1.3: device disconnected

複製代碼

我使用的50-usb-3gdongle.rules 档案如下

1. # You can modify it, as long as you keep each rule on a single
   
2. # line, and change only the value of the NAME= key.
   
3. 
   
4. # Huawei E180 dongle
   
5. SUBSYSTEM=="usb", ATTR{idVendor}=="12d1", ATTR{idProduct}=="140c", RUN+="/usr/sbin/usb_modeswitch -v 12d1 -p 140c -W -H"

複製代碼