Can't see HC2

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Can't see HC2

Unread postby 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/application_note/software/headless_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!
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Re: Can't see HC2

Unread postby 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 postby 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 postby 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 postby 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 postby 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 postby 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 postby 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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