Suggestions for Hardware/driver WIFI combo that allows low level signal access

[Micha Feigin]

Hi All,

I'm was wondering if anyone here can recommend a hardware / driver combo 
for WIFI that allows access to the low level signal. I'm looking to do 
some non-communication related research (uni stuff) that requires 
sending custom signals over WIFI frequencies (to avoid FCC limitations), 
and I was hoping that there is some existing hardware that I can hack at 
the driver level instead of building complex hardware (which I have, but 
getting a high enough accuracy starts getting pretty expensive).


I'm not looking to bypass power/frequency limitations, just to send 
custom signals over one of the WIFI channels.


Thanks

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Re: Google: Create A Native Linux Google Drive Application -

[Micha Feigin]

On 06/19/2013 07:41 AM, Julian Daich wrote:

Please sign for this campaign: 
http://www.change.org/es/peticiones/google-create-a-native-linux-google-drive-application?share_id=ADrOjDOjXr&utm_campaign=mailto_link&utm_medium=email&utm_source=share_petition




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page comes up in Spanish, is it just me or the link?

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Re: Suggestions for Hardware/driver WIFI combo that allows low level signal access

[Geoffrey S. Mendelson]

On 7/2/2013 7:49 PM, Micha Feigin wrote:

Hi All,

I'm was wondering if anyone here can recommend a hardware / driver combo
for WIFI that allows access to the low level signal. I'm looking to do
some non-communication related research (uni stuff) that requires
sending custom signals over WIFI frequencies (to avoid FCC limitations),
and I was hoping that there is some existing hardware that I can hack at
the driver level instead of building complex hardware (which I have, but
getting a high enough accuracy starts getting pretty expensive).

I'm not looking to bypass power/frequency limitations, just to send
custom signals over one of the WIFI channels.


That would not be legal without an amateur radio or experimental 
transmitter license.


You are not legally permitted to modify a WiFi device to transmit more 
than 100mW EIRP, operate on the legal 2.4 and 5.8 gHz channels allocated 
to WIFI and use any other modulation or data encoding.


You mention FCC limitations. They are different than Israeli ones as far 
as EIRP, but basically the same about modification of devices. Of course 
ISRAELI laws apply here and region 1 IARC rules.


If you are in an under FCC jurisdiction, that would be covered by region 
2 IARC rules and be aware that the FCC has a very active enforcement 
division and would be glad to slap you with a $10,000 fine for each 
violation they detect.



Sorry.

Geoff.

--
Geoffrey S. Mendelson,  N3OWJ/4X1GM/KBUH7245/KBUW5379

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Permissions to access USB camera under debian

[Micha Feigin]

Hi All,

I'm trying to connect a camera (Mesa Imaging Swissranger specifically) 
to a Debian unstable box. I'm getting an error that the user does not 
have permissions to open the USB device (needs read/write access). 
Couldn't find any relevant group to add my user to to solve the problem. 
Any idea as to how to grant access?


I've manged to get some information when running as sudo although it 
still was a bit problematic, and I'd rather explore the issue as a 
regular user and not root.


Thanks

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Re: Permissions to access USB camera under debian

[shimi]

On Tue, Jul 2, 2013 at 8:09 PM, Micha Feigin  wrote:

> Hi All,
>
> I'm trying to connect a camera (Mesa Imaging Swissranger specifically) to
> a Debian unstable box. I'm getting an error that the user does not have
> permissions to open the USB device (needs read/write access). Couldn't find
> any relevant group to add my user to to solve the problem. Any idea as to
> how to grant access?
>
> I've manged to get some information when running as sudo although it still
> was a bit problematic, and I'd rather explore the issue as a regular user
> and not root.
>
>
> Do you have a 'camera' group? Alternatively you could look for *v4l* and
*video* under the /dev tree...

HTH,

-- Shimi
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Re: Suggestions for Hardware/driver WIFI combo that allows low level signal access

[Baruch Siach]

Hi Micha,

On Tue, Jul 02, 2013 at 12:49:19PM -0400, Micha Feigin wrote:
> I'm was wondering if anyone here can recommend a hardware / driver
> combo for WIFI that allows access to the low level signal. I'm
> looking to do some non-communication related research (uni stuff)
> that requires sending custom signals over WIFI frequencies (to avoid
> FCC limitations), and I was hoping that there is some existing
> hardware that I can hack at the driver level instead of building
> complex hardware (which I have, but getting a high enough accuracy
> starts getting pretty expensive).
> 
> I'm not looking to bypass power/frequency limitations, just to send
> custom signals over one of the WIFI channels.

A Linux WiFi driver is meant to give you access to a network, not to let you 
control the radio signal used to send network packets. Even if a WiFi hardware 
that allows tweaking the radio signals did exist, I doubt a standard driver 
would expose these capabilities to the user.

You may, however, have some luck with this: 
https://github.com/qca/open-ath9k-htc-firmware. This is the source code of the 
firmware running "inside" the WiFi hardware of some Atheros (now Qualcomm) 
products. You'll have to tweak the firmware code to expose the desired 
capabilities to the host machine. Then, you need to teach the kernel driver 
(ath9k) how to use these capabilities.

I hope this helps.

baruch

-- 
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=}ooO--U--Ooo{=
   - bar...@tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -

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Re: Permissions to access USB camera under debian

[Micha Feigin]

Doesn't seem to be a camera group (there is a camera user, which may 
affect that), no v4l and video under the dev tree.
Only thing I found that changes under dev during connection is these two 
files:


lrwxrwxrwx 1 root root 18 Jul  2 13:35 /dev/char/189:389 -> 
../bus/usb/004/006

crw-rw-r-T 1 root root 189, 389 Jul  2 13:35 /dev/bus/usb/004/006

So I don't think that it shows up as a camera but rather as a USB device 
(which makes sense as it's a depth camera that returns three images per 
frame with some extra related parameters, not a regular camera)
Looks like I need to change something in the system setup to change the 
default group or something similar


Device shows up as this:
1865748.404803] usb 4-2: new high-speed USB device number 6 using ehci-pci
[1865748.537404] usb 4-2: New USB device found, idVendor=1ad2, 
idProduct=0075
[1865748.537410] usb 4-2: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0

[1865748.537413] usb 4-2: Product: 3D-SR4000
[1865748.537417] usb 4-2: Manufacturer: MESA

Thanks

On 07/02/2013 01:14 PM, shimi wrote:


On Tue, Jul 2, 2013 at 8:09 PM, Micha Feigin > wrote:


Hi All,

I'm trying to connect a camera (Mesa Imaging Swissranger
specifically) to a Debian unstable box. I'm getting an error that
the user does not have permissions to open the USB device (needs
read/write access). Couldn't find any relevant group to add my
user to to solve the problem. Any idea as to how to grant access?

I've manged to get some information when running as sudo although
it still was a bit problematic, and I'd rather explore the issue
as a regular user and not root.


Do you have a 'camera' group? Alternatively you could look for *v4l* 
and *video* under the /dev tree...


HTH,

-- Shimi



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Re: Permissions to access USB camera under debian

[Micha Feigin]

On 07/02/2013 01:41 PM, Micha Feigin wrote:
Doesn't seem to be a camera group (there is a camera user, which may 
affect that), no v4l and video under the dev tree.
Only thing I found that changes under dev during connection is these 
two files:


lrwxrwxrwx 1 root root 18 Jul  2 13:35 /dev/char/189:389 -> 
../bus/usb/004/006

crw-rw-r-T 1 root root 189, 389 Jul  2 13:35 /dev/bus/usb/004/006

So I don't think that it shows up as a camera but rather as a USB 
device (which makes sense as it's a depth camera that returns three 
images per frame with some extra related parameters, not a regular camera)
Looks like I need to change something in the system setup to change 
the default group or something similar


Device shows up as this:
1865748.404803] usb 4-2: new high-speed USB device number 6 using ehci-pci
[1865748.537404] usb 4-2: New USB device found, idVendor=1ad2, 
idProduct=0075
[1865748.537410] usb 4-2: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0

[1865748.537413] usb 4-2: Product: 3D-SR4000
[1865748.537417] usb 4-2: Manufacturer: MESA

Thanks

On 07/02/2013 01:14 PM, shimi wrote:


On Tue, Jul 2, 2013 at 8:09 PM, Micha Feigin > wrote:


Hi All,

I'm trying to connect a camera (Mesa Imaging Swissranger
specifically) to a Debian unstable box. I'm getting an error that
the user does not have permissions to open the USB device (needs
read/write access). Couldn't find any relevant group to add my
user to to solve the problem. Any idea as to how to grant access?

I've manged to get some information when running as sudo although
it still was a bit problematic, and I'd rather explore the issue
as a regular user and not root.


Do you have a 'camera' group? Alternatively you could look for *v4l* 
and *video* under the /dev tree...


HTH,

-- Shimi





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since I've been active on mailing lists apparently ...
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Re: Permissions to access USB camera under debian

[shimi]

On Tue, Jul 2, 2013 at 8:41 PM, Micha Feigin  wrote:

>  Doesn't seem to be a camera group (there is a camera user, which may
> affect that), no v4l and video under the dev tree.
> Only thing I found that changes under dev during connection is these two
> files:
>
> lrwxrwxrwx 1 root root 18 Jul  2 13:35 /dev/char/189:389 ->
> ../bus/usb/004/006
> crw-rw-r-T 1 root root 189, 389 Jul  2 13:35 /dev/bus/usb/004/006
>
> So I don't think that it shows up as a camera but rather as a USB device
> (which makes sense as it's a depth camera that returns three images per
> frame with some extra related parameters, not a regular camera)
> Looks like I need to change something in the system setup to change the
> default group or something similar
>
> Device shows up as this:
> 1865748.404803] usb 4-2: new high-speed USB device number 6 using ehci-pci
> [1865748.537404] usb 4-2: New USB device found, idVendor=1ad2,
> idProduct=0075
> [1865748.537410] usb 4-2: New USB device strings: Mfr=1, Product=2,
> SerialNumber=0
> [1865748.537413] usb 4-2: Product: 3D-SR4000
> [1865748.537417] usb 4-2: Manufacturer: MESA
>

If you want to control the default owner/group and/or permissions of
devices as they're discovered based on their characteristics, probably
udev's rules[1] is what you're looking for.

HTH,

-- Shimi

[1] http://www.reactivated.net/writing_udev_rules.html
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Re: Suggestions for Hardware/driver WIFI combo that allows low level signal access

[Micha Feigin]

On 07/02/2013 01:05 PM, Geoffrey S. Mendelson wrote:

On 7/2/2013 7:49 PM, Micha Feigin wrote:

Hi All,

I'm was wondering if anyone here can recommend a hardware / driver combo
for WIFI that allows access to the low level signal. I'm looking to do
some non-communication related research (uni stuff) that requires
sending custom signals over WIFI frequencies (to avoid FCC limitations),
and I was hoping that there is some existing hardware that I can hack at
the driver level instead of building complex hardware (which I have, but
getting a high enough accuracy starts getting pretty expensive).

I'm not looking to bypass power/frequency limitations, just to send
custom signals over one of the WIFI channels.


That would not be legal without an amateur radio or experimental 
transmitter license.


You are not legally permitted to modify a WiFi device to transmit more 
than 100mW EIRP, operate on the legal 2.4 and 5.8 gHz channels 
allocated to WIFI and use any other modulation or data encoding.


You mention FCC limitations. They are different than Israeli ones as 
far as EIRP, but basically the same about modification of devices. Of 
course ISRAELI laws apply here and region 1 IARC rules.


If you are in an under FCC jurisdiction, that would be covered by 
region 2 IARC rules and be aware that the FCC has a very active 
enforcement division and would be glad to slap you with a $10,000 fine 
for each violation they detect.



Sorry.

Geoff.



Thanks for the info.

I'm currently working in the states, probably should check Israeli/USA 
law at some point. What I have now is this interesting setup which 
implements narrow bandwidth radar at the 2.4GHz range. As far as I know 
it is legal in the states (it uses readily available hardware as well)


http://www.glcharvat.com/Dr._Gregory_L._Charvat_Projects/Cantenna_Radar.html

It basically connects a signal generator to a voltage controlled 
ocsilator with 200MHz bandwidth around 2.4GHz.
I was looking to expand on this idea in the direction of the work by 
Dina Katabi from MIT CSAIL which require hacking the signal that the 
radar sends


http://people.csail.mit.edu/fadel/wivi/

The trick is not to change spectrum or intensity, but play a bit with 
the signal modulation within the regulated frequency range. Most of the 
stuff could probably also be done within the legal / standard WIFI type 
communication, but I need finer control over timing / encoding which 
would probably be either very hard or impossible to achieve going 
through the regular network stack.


I am also looking at UWB / XBAND but that is a completely different 
discussion that involves people that are allowed to do it and very 
custom (expensive) hardware.


Thanks

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Re: Permissions to access USB camera under debian

[Evgeniy Ginzburg]

ls /dev/ before and after connecting camera let you determine which /dev/
nodes are creared.
ls -l /dev/something gives you user and group this device node created
under.
id [username] gives you in which groups this user enlisted.
Add this user to group that have read/write access to node.
If unfortunately device node under root:root you'll have to mess with udev
rules.

Regards, Evgeniy.
 On Jul 2, 2013 8:09 PM, "Micha Feigin"  wrote:

> Hi All,
>
> I'm trying to connect a camera (Mesa Imaging Swissranger specifically) to
> a Debian unstable box. I'm getting an error that the user does not have
> permissions to open the USB device (needs read/write access). Couldn't find
> any relevant group to add my user to to solve the problem. Any idea as to
> how to grant access?
>
> I've manged to get some information when running as sudo although it still
> was a bit problematic, and I'd rather explore the issue as a regular user
> and not root.
>
> Thanks
>
> __**_
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> Linux-il@cs.huji.ac.il
> http://mailman.cs.huji.ac.il/**mailman/listinfo/linux-il
>
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Re: Suggestions for Hardware/driver WIFI combo that allows low level signal access

[Geoffrey S. Mendelson]

On 7/2/2013 9:13 PM, Micha Feigin wrote:



I'm currently working in the states, probably should check Israeli/USA
law at some point. What I have now is this interesting setup which
implements narrow bandwidth radar at the 2.4GHz range. As far as I know
it is legal in the states (it uses readily available hardware as well)

http://www.glcharvat.com/Dr._Gregory_L._Charvat_Projects/Cantenna_Radar.html



Dr. Charvat has an amateur radio license, callsign N8ZRY.

As for the 2.4 gHz band being available for unlicensed use for 
unapproved devices I have no idea. I do know that it is NOT legal in 
Israel.


There was a conflict between the IDF and Wifi and Bluetooth devices and 
the IDF was given a huge sum of money to buy new equipment to get off 
the short range bluetooth channels, and channels 4-8 of WIFI.


Then Omri Sharon came back from vacation and showed his father some 
WIFI/Bluetooth device and by order of the Prime Minister, all Bluetooth 
and the EU Wifi channels were allowed. (1-12).


However the power limit of 100 mW EIRP was strictly enforced and amateur 
radio operators lost their ability to use higher power.


5.8 gHz was allowed here April 1, 2012.

Still one would have to be careful what you do, placing a USB WIFI 
dongle or a gain antenna of any sort inside a coffee can would raise the 
power beyond the 100mW EIRP limit.


The famous Pringles can antenna is illegal both in the US and Israel. So 
are all of those $20 Yagi antennas on eBay, although if there is 
sufficient feed line loss they would be legal in the US.


I think the best thing to do would be to contact Charvat directly and 
ask him for advice about what you can and cannot do.


If you require an Amateur radio license, you can study for a technican 
class license in the US in a weekend (there often are "cram" classes) 
and take the test almost anywhere. If you are at MIT, I'm sure there is 
a radio club and people to help you.


If I were you while you were at it, I would go at least as far as a 
General class license, the next step up. If you are an Israeli citizen, 
you can then get an Israeli license without taking any tests, as long as 
you can prove that you were studying in the US at the time.


The MOC is legally required to accept your US license for conversion 
even if you flew in for the weekend, took the test and flew home, but it 
is a lot easier if you are living there when you take the test.


Getting the equivalent of a General or Extra Class license in Israel is 
far more difficult than it is in the US.






It basically connects a signal generator to a voltage controlled
ocsilator with 200MHz bandwidth around 2.4GHz.
I was looking to expand on this idea in the direction of the work by
Dina Katabi from MIT CSAIL which require hacking the signal that the
radar sends

http://people.csail.mit.edu/fadel/wivi/

The trick is not to change spectrum or intensity, but play a bit with
the signal modulation within the regulated frequency range. Most of the
stuff could probably also be done within the legal / standard WIFI type
communication, but I need finer control over timing / encoding which
would probably be either very hard or impossible to achieve going
through the regular network stack.



That's very interesting. She uses standard WIFI hardware, channels and 
data streams which would make it legal.


More likely, what you will have to do to use WIFI hardware is not only 
control the timing, but to figure out what bit patterns produce the 
signals that you want.


Note that the legality of WIFI equipment and signals are based upon the 
transmitter, in the US it is legal to do almost anything with the receiver.


You may want to look at the USB DVB-T dongles that are being used as 
software defined radios. I don't know of any that work as high as 
2.4gHz, but there may be one by now.





I am also looking at UWB / XBAND but that is a completely different
discussion that involves people that are allowed to do it and very
custom (expensive) hardware.


Way beyond this discussion.

Geoff.


--
Geoffrey S. Mendelson,  N3OWJ/4X1GM/KBUH7245/KBUW5379

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Re: Google: Create A Native Linux Google Drive Application -

[Evgeniy Ginzburg]

Link.
http://www.change.org/en-GB/petitions/google-create-a-native-linux-google-drive-application
On Jul 2, 2013 7:51 PM, "Micha Feigin"  wrote:

> On 06/19/2013 07:41 AM, Julian Daich wrote:
>
>> Please sign for this campaign: http://www.change.org/es/**
>> peticiones/google-create-a-**native-linux-google-drive-**
>> application?share_id=**ADrOjDOjXr&utm_campaign=**
>> mailto_link&utm_medium=email&**utm_source=share_petition
>>
>>
>>
>>
>> __**_
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>> Linux-il@cs.huji.ac.il
>> http://mailman.cs.huji.ac.il/**mailman/listinfo/linux-il
>>
> page comes up in Spanish, is it just me or the link?
>
> __**_
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Re: Suggestions for Hardware/driver WIFI combo that allows low level signal access

[E.S. Rosenberg]

>From all the previous talk I understand I may be way out of my league
but from managing campus Wifi networks I learned that Israel afaik
allows channels 1 through 13, while it limits channels 1-4 iirc to
indoor use only (god knows how the intended to enforce that one)

2013/7/2 Geoffrey S. Mendelson :
> On 7/2/2013 9:13 PM, Micha Feigin wrote:
>
>>
>> I'm currently working in the states, probably should check Israeli/USA
>> law at some point. What I have now is this interesting setup which
>> implements narrow bandwidth radar at the 2.4GHz range. As far as I know
>> it is legal in the states (it uses readily available hardware as well)
>>
>>
>> http://www.glcharvat.com/Dr._Gregory_L._Charvat_Projects/Cantenna_Radar.html
>
>
>
> Dr. Charvat has an amateur radio license, callsign N8ZRY.
>
> As for the 2.4 gHz band being available for unlicensed use for unapproved
> devices I have no idea. I do know that it is NOT legal in Israel.
>
> There was a conflict between the IDF and Wifi and Bluetooth devices and the
> IDF was given a huge sum of money to buy new equipment to get off the short
> range bluetooth channels, and channels 4-8 of WIFI.
>
> Then Omri Sharon came back from vacation and showed his father some
> WIFI/Bluetooth device and by order of the Prime Minister, all Bluetooth and
> the EU Wifi channels were allowed. (1-12).
>
> However the power limit of 100 mW EIRP was strictly enforced and amateur
> radio operators lost their ability to use higher power.
>
> 5.8 gHz was allowed here April 1, 2012.
>
> Still one would have to be careful what you do, placing a USB WIFI dongle or
> a gain antenna of any sort inside a coffee can would raise the power beyond
> the 100mW EIRP limit.
>
> The famous Pringles can antenna is illegal both in the US and Israel. So are
> all of those $20 Yagi antennas on eBay, although if there is sufficient feed
> line loss they would be legal in the US.
>
> I think the best thing to do would be to contact Charvat directly and ask
> him for advice about what you can and cannot do.
>
> If you require an Amateur radio license, you can study for a technican class
> license in the US in a weekend (there often are "cram" classes) and take the
> test almost anywhere. If you are at MIT, I'm sure there is a radio club and
> people to help you.
>
> If I were you while you were at it, I would go at least as far as a General
> class license, the next step up. If you are an Israeli citizen, you can then
> get an Israeli license without taking any tests, as long as you can prove
> that you were studying in the US at the time.
>
> The MOC is legally required to accept your US license for conversion even if
> you flew in for the weekend, took the test and flew home, but it is a lot
> easier if you are living there when you take the test.
>
> Getting the equivalent of a General or Extra Class license in Israel is far
> more difficult than it is in the US.
>
>
>
>>
>>
>> It basically connects a signal generator to a voltage controlled
>> ocsilator with 200MHz bandwidth around 2.4GHz.
>> I was looking to expand on this idea in the direction of the work by
>> Dina Katabi from MIT CSAIL which require hacking the signal that the
>> radar sends
>>
>> http://people.csail.mit.edu/fadel/wivi/
>>
>> The trick is not to change spectrum or intensity, but play a bit with
>> the signal modulation within the regulated frequency range. Most of the
>> stuff could probably also be done within the legal / standard WIFI type
>> communication, but I need finer control over timing / encoding which
>> would probably be either very hard or impossible to achieve going
>> through the regular network stack.
>>
>
> That's very interesting. She uses standard WIFI hardware, channels and data
> streams which would make it legal.
>
> More likely, what you will have to do to use WIFI hardware is not only
> control the timing, but to figure out what bit patterns produce the signals
> that you want.
>
> Note that the legality of WIFI equipment and signals are based upon the
> transmitter, in the US it is legal to do almost anything with the receiver.
>
> You may want to look at the USB DVB-T dongles that are being used as
> software defined radios. I don't know of any that work as high as 2.4gHz,
> but there may be one by now.
>
>
>
>
>> I am also looking at UWB / XBAND but that is a completely different
>> discussion that involves people that are allowed to do it and very
>> custom (expensive) hardware.
>
>
> Way beyond this discussion.
>
>
> Geoff.
>
>
> --
> Geoffrey S. Mendelson,  N3OWJ/4X1GM/KBUH7245/KBUW5379
>
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Re: Permissions to access USB camera under debian

[E.S. Rosenberg]

(re:all)
2013/7/2 Evgeniy Ginzburg :
> ls /dev/ before and after connecting camera let you determine which /dev/
> nodes are creared.
*if* device nodes are created...
> ls -l /dev/something gives you user and group this device node created
> under.
> id [username] gives you in which groups this user enlisted.
> Add this user to group that have read/write access to node.
> If unfortunately device node under root:root you'll have to mess with udev
> rules.
>
> Regards, Evgeniy.
I would go with the suggestion above on udev rules, if your kernel has
drivers for the device, some automagically generated rules may already
exist, on Debian that would be /etc/udev/rules.d/
As a quick and dirty fix you can of course just run chmod a+rw on the
device node.
Also tail syslog while connecting/disconnecting the device and maybe
also during the access attempt there's a wealth of good info there.

HTH,
Eliyahu - אליהו

>
> On Jul 2, 2013 8:09 PM, "Micha Feigin"  wrote:
>>
>> Hi All,
>>
>> I'm trying to connect a camera (Mesa Imaging Swissranger specifically) to
>> a Debian unstable box. I'm getting an error that the user does not have
>> permissions to open the USB device (needs read/write access). Couldn't find
>> any relevant group to add my user to to solve the problem. Any idea as to
>> how to grant access?
>>
>> I've manged to get some information when running as sudo although it still
>> was a bit problematic, and I'd rather explore the issue as a regular user
>> and not root.
>>
>> Thanks
>>
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>
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Devops Days Tel-Aviv - September 30th - October 1st 2013

[Amos Shapira]

Tel-Aviv is going to have its own DevOpsDays - enjoy:

http://devopsdays.org/events/2013-telaviv/


-- 
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Job offer: Wordlmate is looking for a NeoOps person

[Vitaly]

"WorldMate is looking for a web operations person to work within the
Operations department. He/she will be expected to take full
responsibility for our production environment, which will include
server software and OS maintenance, system scalability; tune ups for
systems such as JBoss, Tomcat, MongoDB, MySQL, Apache and others;
application deployment to production environments; and monitoring of
all our environments. Work will require good scripting abilities,
Linux admin level and DB knowledge."

See http://www.worldmate.com/aboutus/careers.php#job_3 for details and contact.

Regards,
Vitaly

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