Has anyone run more than 2 dongles in Ubuntu with success?

[Clambino]

I've been trying to run 4 dongles and one or two eventually drop off. There's no pattern that I can see either. Sometimes they die after a few minutes and sometimes it'll take days but eventually one or two will drop. I'm running them on a powered USB hub so it's not a power problem. I turned off USB suspend with no luck. I increased the USB memory allocation as well with no joy. I'm out of ideas. 

[Shane M]

I have to say that I'm running Ubuntu 23.10 with 4 SDR's with very few hiccups, but can't say I'm doing anything special to make it work. 
3 of my SDR's are Nooelecs, and one is an RTLSDR blog v3, they are all fed with one antenna through into a Stridsberg multicoupler.

I allocate 2 of those SDR's to radiosonde_auto_rx, I run the Ballina station in Northern NSW Australia, and at times I pickup launches at Moree, or sometimes a "re-launch" from Brisbane.

The thing is though, I only run radiosonde_auto_rx part time, in that I'll set a cronjob start the docker container a few minutes before I expect to see a sonde at my location, and then shut it down after a couple of hours. 

So the part time nature of my setup might avoid a reset event or some such, but like yourself I'm also running a powered USB hub, just a TP link powered hub here. 

I know that the raspberry pi really struggles with more than a couple of SDR's at the same time without resetting. So rather than ubuntu, perhaps its USB Bus or machine related. rather than OS related.  

[Hasan N0AN]

I"m running 1 Nooelec and 3 RTL820 v3 on my PI4 without difficulty. They run 24x7 for weeks at a time without a reboot. I'm running a USB 3 11 port HUB plugged into the PI4.

I'm running a 403 preamp from Noolec driving a Mini-Circuits 4 way SMA splitter. Antenna is an X 200 collinear at 60' fed with 1/2" hardline.

sdr_1 is 00000007

sdr_2 thru 4 are  numbered 4,5 and 6 respectively.

 

73, N0AN

Hasan

--
You received this message because you are subscribed to the Google Groups "radiosonde_auto_rx" group.
To unsubscribe from this group and stop receiving emails from it, send an email to radiosonde_auto...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/radiosonde_auto_rx/bf832fda-2b6d-450a-8a35-fbd5ec7903d0n%40googlegroups.com.

[ka1...@gmail.com]

Hello

I'am WAS runing 4 sdr receiver's connected to different type of motherboards, Intel / raspberry π 3 & 4 powered USB hub with the same problems.

I did read a comment about assigning Binary serial numbers to the sdr's.

Tried: 1, 2, 4, 8  Still no good, then 2, 4, 8, 16 now I had 3 working receivers, Then I assigned address 4, 8, 16, 32 now it has been working without errors for 9 days.

Here is the currant setup, Raspberry π 4 8gb ram with passive_cooling case "Geekworm", sdr's RTL-SDR Blog V3 connected with a 20cm/8" cable direct to RPI.

OS = Debian 11 Bullseye

73 de Kim,  KA1WCC - OZ1ARQ

Echolink 641080

IRLP 5122

On 16/05/2024 18.53, Clambino wrote:

I've been trying to run 4 dongles and one or two eventually drop off. There's no pattern that I can see either. Sometimes they die after a few minutes and sometimes it'll take days but eventually one or two will drop. I'm running them on a powered USB hub so it's not a power problem. I turned off USB suspend with no luck. I increased the USB memory allocation as well with no joy. I'm out of ideas.  --
You received this message because you are subscribed to the Google Groups "radiosonde_auto_rx" group.
To unsubscribe from this group and stop receiving emails from it, send an email to radiosonde_auto...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/radiosonde_auto_rx/49c54203-3bd8-4924-adda-ee025b82abd9n%40googlegroups.com.

[Mark Jessop]

Note that the serial number does not need to be programmed with just a number. It can have any 8 ASCII characters, so IDs like 'SDR001', 'SDR002' are acceptable, and due to the serial ID matching used, shouldn't result in weird behaviour with rtlsdr picking the wrong SDR.

73

Mark VK5QI

To view this discussion on the web visit https://groups.google.com/d/msgid/radiosonde_auto_rx/c3c32d4c-8fb2-89e3-2ac0-03c8052e2db4%40gmail.com.

[Randy Standke]

Just about two years ago I had problems connecting three RTL-SDRs to a Pi 4 and running the auto_rx program. The problem was one or more would “drop off” like Clambino experienced. This problem occurred when setting the RTL-SDR serial numbers to numbers such as 01, 02, etc. I was told that using only numbers for the serial numbers can cause problems with the software, and I should select serial numbers that start with a letter. So, I set the serial numbers to SDR01, SDR02, and so on. That fixed it.

 

Randy, KQ6RS

To view this discussion on the web visit https://groups.google.com/d/msgid/radiosonde_auto_rx/c3c32d4c-8fb2-89e3-2ac0-03c8052e2db4%40gmail.com.