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Re: [Discuss-gnuradio] Two rtl2832 dongles in a GRC project

From: Kevin Reid
Subject: Re: [Discuss-gnuradio] Two rtl2832 dongles in a GRC project
Date: Fri, 24 Apr 2015 17:51:59 -0700

On Apr 23, 2015, at 3:32, Игорь Попов <address@hidden> wrote:

> I try to make project with two dongles rtl2832+r820.
> In GNU Radio Companion v3.7.6.1-58-g620817ed I made simple project with two 
> equal channels containing rtl2832_source block and blocks_ctrlport_probe2. 
> And I have an error. The output of programm is:
> libusb error: unknown return code [-6] (int 
> rtl2832::demod::find_device():446) "libusb_claim_interface(devh, 0)"

I'm not familiar with this particular block you're using, but I highly 
recommend you use gr-osmosdr's source block instead. It is widely used and 
works with rtl-sdr devices, and I can confirm that it handles multiple devices 

With gr-osmosdr, you can use the device string to specify two RTL dongles 


or using their EEPROM serials instead, which is useful for consistent 
selection. (Note that most dongles come from the factory with a serial number 
like '000001', so you'll have to use the rtl_eeprom tool to rewrite them to 
unique text of your choice.)

Kevin Reid                                  <http://switchb.org/kpreid/>

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