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Technical Topics => SDR - Software Defined Radio => Topic started by: IQ_imbalance on June 21, 2020, 0338 UTC

Title: RPi Ethernet question
Post by: IQ_imbalance on June 21, 2020, 0338 UTC

So if I’m connecting a device with a static IP directly to my RPi via Ethernet, any speculation why it wouldn’t be detected?  I know the cable is good, I know the Ethernet is good (I can ssh into the RPi from my mac), and I know the device is fine (i can ping it from my macs Ethernet port).  There’s something about the damn RPi configuration that’s just not meshing...I even checked that the device and the RPi have the same subnet mask.
Any ideas?

Title: Re: RPi Ethernet question
Post by: NJQA on June 21, 2020, 1145 UTC

To be clear, you are connecting the RPi directly to the device...a single ethernet cable with no switch or hub in between?  Is that correct?

Years ago it mattered if you had a normal ethernet cable vice a crossover cable for this situation, but it seems like most computers automatically sense and compensate for that today.  I have no idea if the RPi does this....maybe the Mac does and the RPi doesn’t?

Title: Re: RPi Ethernet question
Post by: IQ_imbalance on June 21, 2020, 1345 UTC

Yep...direct connection.  The idea is to use an instance of icecast running on the RPi to stream the device’s (it’s a radio btw) audio wirelessly.

You being up a good point...while the Ethernet port on the RPi should autosense (they’ve done that for awhile) it’s possible something is wonky there.  Wouldn’t matter on the Mac since it would take up the slack, don’t know about the device’s own port.

I should try plugging in my afedri to the RPi and see if those two can communicate....

Title: Re: RPi Ethernet question
Post by: IQ_imbalance on June 21, 2020, 2150 UTC

Finally got it to work.  After messing around with static IPs, etc. just had to set relative priorities for WiFi and ethernet and let DHCP do its thing.

Now...if i can get the rtsp/rtp stream into icecast2...... 

Title: Re: RPi Ethernet question
Post by: syfr on July 01, 2020, 1405 UTC

PiFinder is a handy bit of software.....

Title: Re: RPi Ethernet question
Post by: a417 on July 01, 2020, 1516 UTC

Quote from: NJQA on June 21, 2020, 1145 UTC

Years ago it mattered if you had a normal ethernet cable vice a crossover cable for this situation, but it seems like most computers automatically sense and compensate for that today.  I have no idea if the RPi does this..

The RPi ethernet port fully supports Auto MDI-X (crossover), however the OP did discover that giving ethernet the priority and letting DHCP go at it was the solution

Title: Re: RPi Ethernet question
Post by: Josh on July 01, 2020, 2018 UTC

Leases, especially of the dhcp kind, are messy.