@Gabriel-Ongpauco Thank you so mach. I just got the Expansion Dock. I will try to debrick the Omega ASAP.

I try building my own Ethernet expansion, it look good, PC LAN port LED start blinking.
but httpd command not work, I try reconnect the Ethernet cable and try again. It still same.
any way I can make sure the connect ?

Omega> httpd
Link down: eth0
Link down: eth1
Link down: eth0
Link down: eth1
Link down: eth0
Link down: eth1
Link down: eth0
Link down: eth1
Link down: eth0
Link down: eth1
Link down: eth0
Link down: eth1
Link down: eth0
Link down: eth1
Link down: eth0
Link down: eth1
Link down: eth0
Link down: eth1
Link down: eth0
Link down: eth1
## Error: couldn't initialize eth (cable disconnected?)!

Omega>

I try a project using motion sensor.
if motion detected, turn on a LED.

Program write in Python.

#!/usr/local/bin/python
# -*- coding: utf-8 -*-
import time
import onionGpio
from datetime import datetime

# LED GPIO
led_pin = 0
pir_pin = 9
sleeptime = 100000
led_light_up_time = 1

led = onionGpio.OnionGpio(led_pin)
pir = onionGpio.OnionGpio(pir_pin)

led.setOutputDirection(0)
pir.setInputDirection()

while True:
    value = pir.getValue().rstrip()

    if(value == "1"):
        print datetime.now(),
        print "motion_detected"
        led.setValue(1)
        time.sleep(led_light_up_time)
        led.setValue(0)

It seem work well.
but a problem is when press Ctrl-C to stop running,
then try run again, some time cause ”Resource busy“ error.

root@Omega-6F83:~# python motion2.py
Traceback (most recent call last):
  File "motion2.py", line 17, in <module>
    pir.setInputDirection()
  File "/usr/lib/python2.7/onionGpio.py", line 158, in setInputDirection
    ret         = self._setDirection(_GPIO_INPUT_DIRECTION)
  File "/usr/lib/python2.7/onionGpio.py", line 134, in _setDirection
    status      = self._initGpio()
  File "/usr/lib/python2.7/onionGpio.py", line 46, in _initGpio
    fd.close()
IOError: [Errno 16] Resource busy
root@Omega-6F83:~#

May be onionGpio not release some "Resource" after Ctrl-C.
How can I fix it?

Sorry for replay late, I try to debrick , because I am quite busy and try many time but still not work.
it seem hardware not stable. see following describe. any thing wrong?
(btw, I backed 2 Omega2, hope go smoothly!)

1. Usually only show following message then freeze.

*********************************************
*   U-Boot 1.1.4  (Sep 14 2015, 08:21:31)   *
*********************************************

AP121 (AR9331) U-Boot for Onion Omega

DRAM:   64 MB DDR2 16-bit
id read ox100000ff
FLASH: 16MCLOCKS: 400/400/200/20 MHz (CPU/RAM/AHB/SPI)

LED on during eth initialization...

(freeze)
--------------

1. May be one time go through after many try, then freeze after starting httpd...

*********************************************
*   U-Boot 1.1.4  (Sep 14 2015, 08:21:31)   *
*********************************************

AP121 (AR9331) U-Boot for Onion Omega

DRAM:   64 MB DDR2 16-bit
id read ox100000ff
FLASH: 16MCLOCKS: 400/400/200/20 MHz (CPU/RAM/AHB/SPI)

LED on during eth initialization...

Hit any key to stop autobooting:  0

Omega> httpd
Ethernet mode (duplex/speed): 1/100 Mbps
HTTP server is starting at IP: 192.168.1.1

(freeze)
--------------

I am give up!

@Gabriel-Ongpauco Thank you so mach. I just got the Expansion Dock. I will try to debrick the Omega ASAP.

@Gabriel-Ongpauco I still not get the Expansion Dock, is it still on the way?
or any other new way to debrick the Omega?

@Gabriel-Ongpauco Thank you so mach.

@Boken-Lin Sorry, about how long to get "ethernet expansion"?

@Boken-Lin My address still the same. Thank you so mach.

@Boken-Lin Thank for replay.
I was initially use a phone charger, I check the current only 30-100 mA.
but 2nd day I can't browse and ssh into Onion and can't find it on LAN with tool "fing".
so I trying serial connect to see what happen.
the TTL output reboot was on the case using serial connect, it connected Notebook PC USB and OMEGA micro USB.
Today I try use powered USB hub (HUB with 2.5A power supply ), unfortunate I still can't start httpd.
I think if only current 30-100 mA, Notebook PC USB power is enough.

Thanks! & Merry Christmas!

@Boken-Lin because I can't start httpd. so I try to find problem.
what is "serverip=192.168.1.100" meaning? the Omega ip?
I set PC ip to 192.168.1.111 and ping 192.168.1.1, .100, both no reach.
than I try ping from Omega self, and found it "not alive".

how can I make Omega work. is it any way to use USB serial to make a solution?

I try it, still can't start httpd.
Also it is stranger, why ping self-ipaddr got

Error: ping failed, host 192.168.1.1 is not alive!

Omega> printenv
bootcmd=bootm 0x9F020000
bootdelay=2
baudrate=115200
ipaddr=192.168.1.1
serverip=192.168.1.100
bootfile="firmware.bin"
loadaddr=0x80800000
ncport=6666
uboot_addr=0x9F000000
uboot_name=uboot.bin
uboot_size=0x10000
uboot_upg=if ping $serverip; then tftp $loadaddr $uboot_name && if itest.l $filesize == $uboot_size; then erase $uboot_addr +$filesize && cp.b $loadaddr $uboot_addr $filesize && echo OK!; else echo ERROR! Wrong file size!; fi; else ERROR! Server not reachable!; fi
firmware_addr=0x9F020000
firmware_name=firmware.bin
firmware_upg=if ping $serverip; then tftp $loadaddr $firmware_name && erase $firmware_addr +$filesize && cp.b $loadaddr $firmware_addr $filesize && echo OK!; else ERROR! Server not reachable!; fi
stdin=serial
stdout=serial
stderr=serial
ethact=eth0

Environment size: 779 bytes

Omega> ping 192.168.1.1
Link down: eth0
Link down: eth1

## Error: ping failed, host 192.168.1.1 is not alive!

Omega>