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  •  pschaff
      pschaff
Re: Cent OS 6.2 - Unable to form ttyUSB*
#3
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Joined: 2006/12/13
From Tidewater, Virginia, North America
Posts: 18773
Welcome to the CentOS fora. Please see the recommended reading for new users linked in my signature.

The udev package provides /lib/udev/modem-modeswitch and a usb_modeswitch package is available from RPMforge repo.
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Recommended reading: FAQ & Readme first ; Search hint: google "your topic site:centos.org"; Smart Questions
Posted on: 2012/2/22 19:07
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  •  TrevorH
      TrevorH
Re: Cent OS 6.2 - Unable to form ttyUSB*
#2
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Joined: 2009/9/24
From Brighton, UK
Posts: 6321
Chances are that you need to run a utility called usb_modeswitch or modem-modeswitch. Many USB modems come with Windows drivers built into a flash memory device on the modem that emulates a CD - the idea is that when plugged into a Windows system the drivers for the modem are available and can be installed and as part of the install, it runs the modeswitch so the user never needs to intervene.
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Posted on: 2012/2/22 8:43
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  •  yunghee
      yunghee
Cent OS 6.2 - Unable to form ttyUSB*
#1
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Joined: 2012/2/22
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Posts: 2
Dear Sir/Madam,

I was a fedora user and managed to switch to CentOS.
Trouble I faced is that CentOS unable to form my Huawei 3G Broadband stick into 'ttyUSBX' format.
I need the ttyUSB format for my GSM modem purpose.
I tried in fedora 16 and I can read the ttyUSBX without any extra installation.

The output of dmesg after I insert my Huawei 3G Broadband modem:
usb 1-1.1: new high speed USB device using ehci_hcd and address 6
usb 1-1.1: New USB device found, idVendor=12d1, idProduct=1446
usb 1-1.1: New USB device strings: Mfr=3, Product=2, SerialNumber=0
usb 1-1.1: Product: HUAWEI Mobile
usb 1-1.1: Manufacturer: HUAWEI Technology
usb 1-1.1: configuration #1 chosen from 1 choice
scsi10 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
scsi11 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
scsi 11:0:0:0: Direct-Access     HUAWEI   SD Storage       2.31 PQ: 0 ANSI: 2
sd 11:0:0:0: Attached scsi generic sg4 type 0
sd 11:0:0:0: [sdc] Attached SCSI removable disk



Then I tried inserted the normal GSM MOdem I could read the ttyUSB0.
usb 1-1.1: new full speed USB device using ehci_hcd and address 9
usb 1-1.1: New USB device found, idVendor=067b, idProduct=2303
usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1.1: configuration #1 chosen from 1 choice
pl2303 1-1.1:1.0: pl2303 converter detected
usb 1-1.1: pl2303 converter now attached to ttyUSB0


What are the configurations I have to do in order to allow Cent OS create the ttyUSBX for my 3G broadband stick?
Your help is very appreciated!
Posted on: 2012/2/22 7:47
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