Can't see HC2

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WaltZ
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Can't see HC2

Unread post by WaltZ » Fri May 18, 2018 1:42 pm

I just bought an HC2. I have it connected to a 12V/1A PSU. I've installed Ubuntu Mate, and started following the instructions on https://wiki.odroid.com/odroid-xu4/appl ... less_setup. But the arp command does not find the HC2. I have a yellow light on the network adapter and a blinking blue heartbeat. Any ideas?

Thanks!
Walt

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Re: Can't see HC2

Unread post by odroid » Fri May 18, 2018 11:55 pm

12V/2A PSU should be used if you connected a 3.5" HDD.

Try AngryIP scanner to detect the HC2. http://angryip.org/

Did you flash Ubuntu 16.04 image or 18.04 image?
Let us know the file name.

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Re: Can't see HC2

Unread post by WaltZ » Sat May 19, 2018 12:43 am

Thanks for the reply.

I've tried both with the HDD installed and without.

AngryIP shows the same IP addresses as the nmap command.

I've tried both 16.04 and 18.04:
ubuntu-16.04.3-4.14-mate-odroid-xu4-20171212.img.xz
and
ubuntu-18.04-4.14-mate-odroid-xu4-20180501.img.xz

I've also tried different network cables and different ports on my router.

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Re: Can't see HC2

Unread post by odroid » Sat May 19, 2018 3:58 am

Once the first booting process complete well, the system turns off automatically.
It did a rootfs auto-resizing and ssh initialization within a minute.
After that, you have to unplug/plug the DC plug again.

BTW, can you connect the HC2 to your PC directly without router to narrow down root causes?

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Re: Can't see HC2

Unread post by WaltZ » Sat May 19, 2018 7:38 am

Yes, I believe I went through the "power on, wait for blue light to go off, and power off and on again" process each time I tried something new.

I plugged the HC2 directly into my PC, but again the nmap command didn't see it.
Here's the nmap command I'm running:
nmap -sn 192.168.0.0/24

My computer's IP address is 192.168.0.27

While the nmap command is running, the amber light on the HC2's network port is blinking.

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Re: Can't see HC2

Unread post by tobetter » Sat May 19, 2018 12:30 pm

WaltZ wrote: nmap -sn 192.168.0.0/24
nmap does not show anything if you run the command?

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Re: Can't see HC2

Unread post by WaltZ » Sat May 19, 2018 9:26 pm

If the network cable is connected directly between the HC2 and my computer, the nmap command shows this:
Starting Nmap 7.60 ( https://nmap.org ) at 2018-05-18 16:28 MDT
Nmap done: 256 IP addresses (0 hosts up) scanned in 0.01 seconds

When it's connected to my router, it lists the computers that have wired connections to my router. I can account for all of the IPs it lists. But it doesn't list the HC2.
On my router, I can click the MAC address of each connected device and it shows me the manufacturer. None of the devices have a MAC that starts with 00:1e:06

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Re: Can't see HC2

Unread post by odroid » Mon May 21, 2018 12:07 pm

Can you please try this minimal Ubuntu image? The Mate desktop image might have a problem if there is no HDMI display connection.
https://wiki.odroid.com/odroid-xu4/os_i ... 4/20171213

BTW, Does the blue LED keep flashing like heartbeat with 12V/1A PSU?

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Re: Can't see HC2

Unread post by WaltZ » Wed May 30, 2018 12:53 am

I tried this image ubuntu-16.04.3-4.14-minimal-odroid-xu4-20171213.img.xz
Same results.
Yes, the blue LED does keep flashing with a 12v1a PSU if I don't connect a hard drive.

I've attached a screenshot of the devices my router can see.
Attachments
Screenshot from 2018-05-29 09-52-03.png
Screenshot from 2018-05-29 09-52-03.png (59.65 KiB) Viewed 449 times

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Re: Can't see HC2

Unread post by odroid » Wed May 30, 2018 8:45 am

It is very hard to know what's wrong.
I still believe you need a stable 12V/2A PSU at least.

Do you use a CAT5E or CAT6 Ethernet cable?
Let me know which color of LED on the RJ45 jack is blinking.

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Re: Can't see HC2

Unread post by WaltZ » Wed May 30, 2018 12:12 pm

I've tried a number of network cables. The current one says CAT5. I've also tried one that says 5e.

The switch the HC2 is plugged into shows a gigabit connection. I've also tried it plugged into my router and directly into my computer.

The only RJ45 LED I've seen blink on the HC2 is the yellow one, and it only blinks when I'm running the nmap command.

This is the second HC2 I've had, and both do the same thing. I also have another ODroid product, I think it's the C1, and have had no problems.

I'm using the 12v2a PSU that came with the latest HC2 from you guys.

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Re: Can't see HC2

Unread post by odroid » Wed May 30, 2018 1:06 pm

LED behaviors look fine.
Green: Flashes when there is 100Mbps connectivity
Yellow: Flashes when there is 1000Mbps connectivity

The possibility of both of two HC2 defectives is extremely low since our overall product failure rate is lower than 0.1%.
So please try this OMV image(OMV_3_0_92_Odroidxu4_4.9.61.img.xz) only for the hardware configuration test.
https://sourceforge.net/projects/openme ... %20images/
Please note the OMV initialization takes a couple of minutes in the first boot process.

Flash the OS image with Etcher. Don't extract .xz file to .img before flashing.
Etcher decompresses the file by itself.
https://wiki.odroid.com/troubleshooting ... s#flashing

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Re: Can't see HC2

Unread post by WaltZ » Wed May 30, 2018 1:34 pm

AH! I see the odroidxu4 (really HC2) on my router! Now what?

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Re: Can't see HC2

Unread post by odroid » Wed May 30, 2018 1:43 pm

Glad to hear you can see it now. :D
Since XU4, XU3, HC1 ,HC2 and MC1 are sharing one OS image, it is normal.

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Re: Can't see HC2

Unread post by WaltZ » Wed May 30, 2018 9:25 pm

OK, it's great that I can see the HC2 using OMV, but I was hoping to set this up as an email server, web server, etc, by putting it in my DMZ. Should I keep using OMV?

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Re: Can't see HC2

Unread post by rooted » Wed May 30, 2018 9:39 pm

OMV is fine for those services.

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Re: Can't see HC2

Unread post by odroid » Thu May 31, 2018 8:27 am

Refer this OMV guide.
https://wiki.odroid.com/odroid-xu4/soft ... as/eng/eng

We have a plan to release a new Ubuntu 18.04 minimal image early next week.
So you can try it too.

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Re: Can't see HC2

Unread post by WaltZ » Thu May 31, 2018 12:27 pm

Very nice. Thank you!

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