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Hi there, I have recently bought a USB to TTL serial converter cable on Amazon. I just bought it to get free postage and thought I would use it with ...
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  1. #1
    Just Joined!
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    Jul 2014
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    1

    USB - TTL Converter Issues...


    Hi there,

    I have recently bought a USB to TTL serial converter cable on Amazon.
    I just bought it to get free postage and thought I would use it with my Raspberry Pi.

    The adafruit raspberry pi tutorial says to use 'screen' to connect. With the cables plugged in, when I run:
    Code:
    sudo screen /dev/ttyUSB0 115200:
    I get an error saying:
    Code:
    Cannot exec '/dev/ttyUSB0': No such file or directory.
    When I plug it in to a USB slot I get:
    Code:
    From 'dmesg'
    [ 3163.762526] usb 3-3: new full-speed USB device number 2 using xhci_hcd
    [ 3163.762705] usb 3-3: Device not responding to set address.
    [ 3163.966709] usb 3-3: Device not responding to set address.
    [ 3164.170765] usb 3-3: device not accepting address 2, error -71
    [ 3164.282989] usb 3-3: new full-speed USB device number 3 using xhci_hcd
    [ 3164.283279] usb 3-3: Device not responding to set address.
    [ 3164.487170] usb 3-3: Device not responding to set address.
    [ 3164.691195] usb 3-3: device not accepting address 3, error -71
    [ 3164.803349] usb 3-3: new full-speed USB device number 4 using xhci_hcd
    [ 3164.803535] usb 3-3: Device not responding to set address.
    [ 3165.007640] usb 3-3: Device not responding to set address.
    [ 3165.211650] usb 3-3: device not accepting address 4, error -71
    [ 3165.323680] usb 3-3: new full-speed USB device number 5 using xhci_hcd
    [ 3165.323821] usb 3-3: Device not responding to set address.
    [ 3165.527985] usb 3-3: Device not responding to set address.
    [ 3165.731963] usb 3-3: device not accepting address 5, error -71
    [ 3165.732086] hub 3-0:1.0: unable to enumerate USB device on port 3
    I'm not too sure what all of this means: is this unit faulty?
    Any ideas would be great!

    I am using Ubuntu 14.04 64 bit

    Thanks

  2. #2
    Just Joined!
    Join Date
    Jul 2014
    Posts
    30
    try to connect to another usb port

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