PuTTy settings: 115200 Baud 8 Data Bits, 1 Stop Bits, No Parity No Flow Control Restoring Pogoplug B04 using serial connection by varptr32

Restoring Pogoplug B04 using serial connection

Hi all,

In my enthousiasm i've followed the instructions on the wiki called 'Install on Pogoplug Pro'. (since the B04 was mentioned there). Unfortunately i didn't read carefully enough and was not aware of the fact that the installer script wasn't ready for the B04 at that time (27/05/2011).

I followed the instruction for exectuing the script and everything went fine. No differing output in comparance with the output as stated in the how to. (Got the 'looks good!' output aswell).

Rebooted my Pogo but then it wouldn't get back up.

I soon realized that i had bricked my nice new Pogoplug....

Fortunately i found great info on the wiki and elsewhere on the internet on how to modify a CA-42 or DKU-5 cable in order to try to establish a serial connection to the Pogoplug's serial interface.

For anybody interested:

Preparing a CA-42 / DKU-5 cable
See this page for the data cable pinout:
http://buffalo.nas-central.org/wiki/Use_a_Nokia_Serial_Cable_on_an_ARM9_Linkstation

The serial pinout (for the three pins needed) on the Pogoplug board is the following: (Facing the rear of the Pogoplug where the powercable goes in) from left to right: pin 1 GND, pin 2 Rx, pin 3, Tx and pin 4 not used. (3.3V pin).

For the connecting the cable to the board you could use a connector from a 'soundcard to cd-rom / dvd -drive' cable.
(I had a right one laying around).

Opening the case of the Pogoplug
See this page for instructions on opening the Pogoplug's casing:
http://plugapps.com/index.php5/Hardware:_Pogoplug_Pro_eSata


Establishing a serial connection with the pogoplug

Windows: Putty-> serial connect?

I'am using Linux for this.
Connect the cable tot the Pogoplug's board and plug the usb end into the computer.
Open a console / terminal on your pc and type:

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screen /dev/ttyUSB0 115200 8N1

(You'll need 'screen' installed for this)

(Eventually) Press a key and you should get the uboot prompt on the device. (Or you should see the Pogoplug booting it's kernel)

Making the Pogoplug boot the original rootfs (busybox based system)
The following is from WarheadsSE (with many thanks for his great help!):

Go into uboot and type:

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printenv

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setenv bootcmd "run boot_nand"
setenv bootargs "root=ubi0:rootfs ubi.mtd=2,512 rootfstype=ubifs console=ttyS0,115200 elevator=cfq mac_adr=0x00,0x25,0x31,0x00,0xd4,0x6f mem=128 poweroutage=yes"

Now print them again:

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printenv

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saveenv
reset

If the printout reads the variables with quotes it will not work.

To prepare the key see the following page:

Follow the instructions found here:

Last edited by varptr32 on Thu Jun 02, 2011 8:18 pm, edited 4 times in total.

 

Posts: 5

Re: Restoring Pogoplug B04 using serial connection

by WarheadsSE » Thu Jun 02, 2011 5:35 pm

Ok great. We'll use the install guide as a reference. We basically need to manually revert the uboot settings.

Get into uboot, and go as follows

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   printenv

You can use this to see what bootargs_stock contains, and copy and paste for below.

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setenv bootcmd "run boot_nand"

setenv bootargs "root=ubi0:rootfs ubi.mtd=2,512 rootfstype=ubifs console=ttyS0,115200 elevator=cfq mac_adr=0x00,0x25,0x31,0x00,0xd4,0x6f mem=128 poweroutage=yes"

Now print them again

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printenv

If bootargs matches bootargs_stock and bootcmd reads correctly, both without quotes, then we're good to save, and reboot:

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saveenv
reset

If the printout reads the variables with quotes it will not work.

OXNAS pwner

WarheadsSE

 

Posts: 1058

Joined: Mon Oct 18, 2010 2:12 pm

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Re: Restoring Pogoplug B04 using serial connection

by varptr32 » Thu Jun 02, 2011 6:59 pm

That did the trick!!! Wonderfull!!

WarheadsSE, thanks for your great help and effort!!! (Thanks for the great installer script and the quick response to add support for the B04!!!)

varptr32

 

Posts: 5

Joined: Fri May 27, 2011 11:59 pm

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Re: Restoring Pogoplug B04 using serial connection

by WarheadsSE » Thu Sep 29, 2011 12:22 pm

Just a note for future readers, on the oxnas line from CE, it is a JST connector.

OXNAS pwner

WarheadsSE

 

Posts: 1058

Joined: Mon Oct 18, 2010 2:12 pm

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Re: Restoring Pogoplug B04 using serial connection

by ahmao » Mon Oct 24, 2011 1:09 am

this definition is correct,

(Facing the rear of the Pogoplug where the powercable goes in) from left to right: pin 1 GND, pin 2 Rx, pin 3, Tx and pin 4 not used. (3.3V pin).

the definition is this pic is either wrong or just for pogoplug v2

http://www.pogoplugged.com/imagelib/con ... 80h580.jpg

ahmao

 

Posts: 9

Joined: Sun Oct 23, 2011 5:47 pm

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Re: Restoring Pogoplug B04 using serial connection

by WarheadsSE » Mon Oct 24, 2011 12:30 pm

That picture is only for the Marvell based boards, not the PLX Oxnas 782x line.

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