I have a raspberry pi 3b on my roof (in a plastic box) with two SDR sticks attached to it. On the raspberry pi the "soapysdr" program runs.

root@antenne:/# lsusb 
Bus 001 Device 005: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Bus 001 Device 004: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T

root@antenne:/# rtl_fm -f 123M -d 1 | more
Found 2 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001
  1:  Realtek, RTL2838UHIDIR, SN: 

Now from my laptop running GQRX, I can connect to the first SDR module attached to the rpi by using the following device string:


My question now is: how do I select the second device? (from within gqrx)


I was looking for days for an answer for this problem and then suddenly I realised it is quite simple:

Use rtl_eeprom to give the the stick without serial a serial number:

rtl_eeprom -d 1 -s 66666666

Then it is only a matter of adding ",serial=66666666" to the device string in gqrx:


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