[TUTORIAL] How to unbrick Nexus 7 without blob.bin (REQUIRES ANOTHER NEXUS 7 2012)

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retiredtab

Senior Member
Nov 16, 2017
1,895
1,801
PoltarGeyst said:
Device sbk: d03a67d4662441b4ae62eba12f359b14
Chip UID: 0x15d456da347fe11
Click to expand...
Click to collapse
Output.
Code: 
# cat /AndroidRoot/cpuinfo 
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d456da347fe11

# ./mknvfblob -W -K d03a67d4662441b4ae62eba12f359b14 --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
 

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P

PoltarGeyst

New member
Aug 6, 2021
2
0
retiredtab said:
Output.
Code: 
# cat /AndroidRoot/cpuinfo
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d456da347fe11

# ./mknvfblob -W -K d03a67d4662441b4ae62eba12f359b14 --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
Click to expand...
Click to collapse
Thanks again. I successfully unbrick N7!!!
 
Dreamer...

Dreamer...

Senior Member
Jul 6, 2007
98
18
10 years of use and in one day...
i need help))))

SBK: 7f8e7f9308c24fd3b8733c1a205d7f0a
Chip UID: 15d24bcc013fc0e
 
R

retiredtab

Senior Member
Nov 16, 2017
1,895
1,801
Dreamer... said:
SBK: 7f8e7f9308c24fd3b8733c1a205d7f0a
Chip UID: 15d24bcc013fc0e
Click to expand...
Click to collapse
Output.
Code: 
# cat /AndroidRoot/cpuinfo 
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d24bcc013fc0e

# ./mknvfblob -W -K 7f8e7f9308c24fd3b8733c1a205d7f0a --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
 

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643656525

Member
Sep 13, 2021
5
0
Could soneone generate a blob for me, please?
Chip UID: 0x15d483b852c1216
SBK: f162041fb99047e6ad0778ff0663afec
 
R

retiredtab

Senior Member
Nov 16, 2017
1,895
1,801
643656525 said:
Chip UID: 0x15d483b852c1216
SBK: f162041fb99047e6ad0778ff0663afec
Click to expand...
Click to collapse
Output.
Code: 
# cat cpuinfo 
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d483b852c1216

# ./mknvfblob -W -K f162041fb99047e6ad0778ff0663afec --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
 

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643656525

Member
Sep 13, 2021
5
0
So I've tried to unbrick it, but get the following issue
1631740752500.png

looking at the 1st post, it seems to be a hardware failiure and is unrecoverable, or is it still salvagable?
 
D

den_horst

New member
Oct 5, 2021
4
0
Hello together,
Could someone generate a blob for me, please?
Chip UID: 0x15d46d95147ec0c
Chip UID: 15d46d95147ec0c
SBK: f78a47a0817b43a9a6e07514412b2cf3
many thanks
 
cherryshrimp45

cherryshrimp45

Member
Oct 19, 2021
5
0
Good day. I hope someone with a good heart can help me generate a blob.

sbk

68656c6c6f2c20776f72


chipuuid

15d3fb626540a02
Thank you!!
 
R

retiredtab

Senior Member
Nov 16, 2017
1,895
1,801
den_horst said:
Chip UID: 15d46d95147ec0c
SBK: f78a47a0817b43a9a6e07514412b2cf3
Click to expand...
Click to collapse
Output.

Code: 
# cat AndroidRoot/cpuinfo 
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d46d95147ec0c


# ./mknvfblob -W -K f78a47a0817b43a9a6e07514412b2cf3 --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
 

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R

retiredtab

Senior Member
Nov 16, 2017
1,895
1,801
StarsatBY said:
SBK: 092dbec060884cc899181fd340f02e58

Chip UID: 0x15d4906df281a17
Click to expand...
Click to collapse
Output.
Code: 
# cat /AndroidRoot/cpuinfo 
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d4906df281a17

# ./mknvfblob -W -K 092dbec060884cc899181fd340f02e58 --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
 

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D

den_horst

New member
Oct 5, 2021
4
0
retiredtab said:
Output.

Code: 
# cat AndroidRoot/cpuinfo
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d46d95147ec0c


# ./mknvfblob -W -K f78a47a0817b43a9a6e07514412b2cf3 --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
Click to expand...
Click to collapse

thank you for creating the file.
Unfortunately I get the following error

...
waiting for bootloader to initialize
bootloader downloaded successfully
setting device: 0 3
failed executing command 11 NvError 0x120002
command failure: create failed (bad data)
bootloader status: specified device is invalid (code: 6) message: nverror:0x4 (0x4) flags: 0

after the command:
./nvflash --configfile flash.cfg --create --bct testr.bct --setbct --bl test.ebt --blob test.blob --sync

it seems that the internal storage is definitely defective. :cry:
Nevertheless thanks again for your help
 
R

retiredtab

Senior Member
Nov 16, 2017
1,895
1,801
cherryshrimp45 said:
SBK

4822eff0a2d84ba081858cdce8998aa8

chipuid

15d3fb626540a02
Click to expand...
Click to collapse
Output.
Code: 
# cat /AndroidRoot/cpuinfo
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d3fb626540a02

# ./mknvfblob -W -K 4822eff0a2d84ba081858cdce8998aa8 --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
 

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cherryshrimp45

Member
Oct 19, 2021
5
0
retiredtab said:
Output.
Code: 
# cat /AndroidRoot/cpuinfo
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d3fb626540a02

# ./mknvfblob -W -K 4822eff0a2d84ba081858cdce8998aa8 --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
Click to expand...
Click to collapse
Wow thank you! have a good day.
 
cherryshrimp45

cherryshrimp45

Member
Oct 19, 2021
5
0
retiredtab said:
Output.
Code: 
# cat /AndroidRoot/cpuinfo
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d3fb626540a02

# ./mknvfblob -W -K 4822eff0a2d84ba081858cdce8998aa8 --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
[/co
[/QUOTE]
Click to expand...
Click to collapse

retiredtab said:
Output.
Code: 
# cat /AndroidRoot/cpuinfo
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d3fb626540a02

# ./mknvfblob -W -K 4822eff0a2d84ba081858cdce8998aa8 --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
Click to expand...
Click to collapse
I succesfully Unbrick my device Thank you

retiredtab​

!!!!!
 
E

eggnews

New member
Nov 2, 2021
2
0
It broken 9 years ago... One of my sad memories.
Please help me.

Chip UID: 0x15d2568771bfc16
SBK b '1d8bafa6e4f34b8eaaadf33838e7bb0516fc1b77'
 
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  • 14
    enderzip
    enderzip
    Thanks to @Jirmd for letting me use his post as a reference.
    Original post: https://xdaforums.com/nexus-7/general/unbrick-nexus-7-tegra-3-device-t4078627

    Alternative Method:
    1. https://github.com/tofurky/tegra30_debrick
    2. https://xdaforums.com/t/tutorial-ge...-without-another-n7-or-tegra30-device.4305955
    (Both methods do not require another Nexus 7)

    Requirements:
    1. Linux-based OS (I use Ubuntu 18.04)
    2. NvFlash and Wheelie (You can download the Linux version down below)
    3. A USB cable (A good and sturdy one)
    4. Nerve of steel lol
    5. Must have APX driver installed.
    6. Another Nexus 7 (Ask someone that have it or ask me)(MUST BE ROOTED AND HAVE TWRP RECOVERY INSTALLED)
    7. ADB (platform-tools)
    1. DUMP SBK VIA USB
    Step 1    : Download fusee-launcher for Nexus 7 from this link and extract it to a folder:
    http://www.mediafire.com/file/sgwsa79idk24z8u/fusee-launcher-n7.zip/file
    Step 2: Open a terminal inside of the folder then type:
    Code: 
    sudo apt-get install python-usb python3-usb
    Wait for it to complete. After that, type:
    Code: 
    pip install pyusb
    Step 3: Connect your device to a USB 3.0 port (REQUIRED). You can check for connection using "lsusb". There must be a "NVidia Corp" in the list.
    Step 4: Type:
    Code: 
    sudo ./fusee-launcher.py –tty dump-sbk-via-usb.bin
    Something like this should appear:
    Code: 
    05f4a5d01'
Stack snapshot: b'0000000000000000100000003c9f0040'
EndpointStatus_stack_addr: 0x40009f3c
ProcessSetupPacket SP: 0x40009f30
InnerMemcpy LR stack addr: 0x40009f20
overwrite_len: 0x00004f20
overwrite_payload_off: 0x00004de0
payload_first_length: 0x00004de0
overwrite_payload_off: 0x00004de0
payload_second_length: 0x0000c7b0
b'00a0004000300040e04d0000b0c70000'
Setting rcm msg size to 0x00030064
RCM payload (len_insecure): b'64000300'

Setting ourselves up to smash the stack...
Payload offset of intermezzo: 0x00000074
overwrite_payload_off: 0x00004de0
overwrite_len: 0x00004f20
payload_overwrite_len: 0x00004e5c
overwrite_payload_off: 0x00004de0
smash_padding: 0x00000000
overwrite_payload_off: 0x00004de0
Uploading payload...
txing 73728 bytes total
txing 4096 bytes (0 already sent) to buf[0] 0x40003000
txing 4096 bytes (4096 already sent) to buf[1] 0x40005000
txing 4096 bytes (8192 already sent) to buf[0] 0x40003000
txing 4096 bytes (12288 already sent) to buf[1] 0x40005000
txing 4096 bytes (16384 already sent) to buf[0] 0x40003000
txing 4096 bytes (20480 already sent) to buf[1] 0x40005000
txing 4096 bytes (24576 already sent) to buf[0] 0x40003000
txing 4096 bytes (28672 already sent) to buf[1] 0x40005000
txing 4096 bytes (32768 already sent) to buf[0] 0x40003000
txing 4096 bytes (36864 already sent) to buf[1] 0x40005000
txing 4096 bytes (40960 already sent) to buf[0] 0x40003000
txing 4096 bytes (45056 already sent) to buf[1] 0x40005000
txing 4096 bytes (49152 already sent) to buf[0] 0x40003000
txing 4096 bytes (53248 already sent) to buf[1] 0x40005000
txing 4096 bytes (57344 already sent) to buf[0] 0x40003000
txing 4096 bytes (61440 already sent) to buf[1] 0x40005000
txing 4096 bytes (65536 already sent) to buf[0] 0x40003000
txing 4096 bytes (69632 already sent) to buf[1] 0x40005000
txing 4096 bytes total
txing 4096 bytes (0 already sent) to buf[0] 0x40003000
Smashing the stack...
sending status request with length 0x00004f20
The USB device stopped responding-- sure smells like we've smashed its stack. :)
Launch complete!
b'4445414442454546'
DEADBEEF
b'3030303030303030'
00000000
b'3030303030303030'
00000000
b'3034303030303930'
04000090
b'4634314330433241'
F41C0C2A
b'3133333731333337'
13371337
b'3535353535353535'
55555555
b'3430303033303030'
40003000
b'3430303035303030'
40005000
b'4141414141414141'
AAAAAAAA
b'3131313131313131'
11111111
b'3030303030303236'
00000026
b'3232323232323232'
22222222
b'68656c6c6f2c20776f726c640a00'
hello, world
b'e57de3bab6cb499d874d5772cb219f0101042c20'

Traceback (most recent call last):
  File "./fusee-launcher.py", line 823, in <module>
    buf = switch.read(USB_XFER_MAX)
  File "./fusee-launcher.py", line 530, in read
    return self.backend.read(length)
  File "./fusee-launcher.py", line 134, in read
    return bytes(self.dev.read(0x81, length, 3000))
  File "/usr/local/lib/python3.6/dist-packages/usb/core.py", line 988, in read
    self.__get_timeout(timeout))
  File "/usr/local/lib/python3.6/dist-packages/usb/_debug.py", line 60, in do_trace
    return f(*args, **named_args)
  File "/usr/local/lib/python3.6/dist-packages/usb/backend/libusb1.py", line 833, in bulk_read
    timeout)
  File "/usr/local/lib/python3.6/dist-packages/usb/backend/libusb1.py", line 936, in __read
    _check(retval)
  File "/usr/local/lib/python3.6/dist-packages/usb/backend/libusb1.py", line 595, in _check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 110] Operation timed out
    Search for the line "hello, world" inside of your log. It looks like this in this example:
    Code: 
    hello, world
b'e57de3bab6cb499d874d5772cb219f0101042c20'
    The last 8 characters are not your SBK. This is the first 8 numbers of your Device ID. Delete this and delete the b' at the start and also the ' at the end.
    The result should look like this:
    Code: 
    e57de3bab6cb499d874d5772cb219f01
    Congratulation, you have successfully dump your device SBK via USB.

    2. GETTING YOUR CPU UID
    Step 1    : Download Wheelie and NvFlash then extract it to a folder.
    Step 2: Download this broken blob.bin file (REQUIRE)
    http://www.mediafire.com/file/32cxvjv2wajokqf/blob.bin/file
    Then place it inside of the Wheelie and NvFlash folder.
    Step 3: Open a terminal inside of the folder then type:
    Code: 
    ./wheelie --blob blob.bin
    After that, something like this should appear:
    Code: 
    Wheelie 0.1 - Preflight for nvflash.
Copyright (c) 2011-2012 androidroot.mobi
========================================
[=] Chip UID: 0x98254853062001158
[-] Incorrect SBK or SBK type selected. nverror: 0x4.
    Search for "Chip UID", remove the "0x" at the beginning. The result should look like this:
    Code: 
    98254853062001158
    Congratulation, you got your chip UID

    3. GENERATE BLOB FILES USING ANOTHER NEXUS 7
    Step 1    : Download MkNvfBlob from this link:
    https://github.com/GeorgeMato4/nvcrypttools/blob/forN7/precompiled/precompiledN7.tar.xz
    Note: Extract this to your Nexus 7.
    Step 1.1: Reboot into TWRP recovery.
    Step 2: Open a terminal inside of you ADB folder then type:
    Code: 
    adb shell
    After that:
    Code: 
    su
    Type this command after that:
    Code: 
    mkdir /AndroidRoot
    Last one:
    Code: 
    cat /proc/cpuinfo > /AndroidRoot/cpuinfo
    Pull the cpuinfo file using this command:
    Code: 
    adb pull /AndroidRoot
    Note: You could copy your cpuinfo file to your PC using MTP (IDK how to do this so search Google lol)
    Open your ADB folder and there should be a AndroidRoot folder with a cpuinfo file inside of it.
    Open cpuinfo using a Text Editor. Something like this should be inside:
    Code: 
    Processor    : ARMv7 Processor rev 9 (v7l)
processor    : 0
BogoMIPS    : 1993.93

processor    : 1
BogoMIPS    : 1993.93

processor    : 2
BogoMIPS    : 1993.93

processor    : 3
BogoMIPS    : 1993.93

Features    : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer    : 0x41
CPU architecture: 7
CPU variant    : 0x2
CPU part    : 0xc09
CPU revision    : 9

Hardware    : grouper
Revision    : 0000
Serial        : 015d4a5f202c0401
    Replace the Serial line with your Chip UID.
    After that, place the cpuinfo file back to the /AndroidRoot folder on your device using this command:
    Code: 
    adb push AndroidRoot /
    After you are done, don't close the ADB windows.
    Step 3: Download bootloader.xbt:
    https://github.com/GeorgeMato4/nvcrypttools/blob/forN7/bootloaders/bootloader.grouper.XBT
    And BCT for your device:
    https://github.com/GeorgeMato4/nvcrypttools/blob/forN7/bct/n7.bct
    And copy these two files to the /AndroidRoot folder on your device.
    Step 4: Type this command on the ADB windows:
    Code: 
    cd /AndroidRoot
    After that, type:
    Code: 
    chmod 777 ./mknvfblob
    After that, type:
    Code: 
    ./mknvfblob -W -K <your SBK> --blob /AndroidRoot/test.blob --bctin /AndroidRoot/n7.bct --bctr /AndroidRoot/testr.bct --bctc /AndroidRoot/testc.bct --blin /AndroidRoot/bootloader.grouper.XBT --blout /AndroidRoot/test.ebt
    Wait for it to do its job.
    After that, go to your /AndroidRoot folder and copy all the file that just got generated (testr.bct, testc.bct. test.ebt, test.blob) to your PC using the adb pull command on Step 2
    Congratulation, you have successfully generate blob for your bricked device.

    4. UNBRICK YOUR DEVICE (The fun part :D )
    Step 1    : Boot your bricked device into APX mode either using Power button or Power + Vol UP.
    Step 2: Open a terminal inside of the folder where you place your NvFlash folder (move the blob file inside of that folder, all of them)
    Step 3: Open a terminal inside of your Wheelie and NvFlash folder. Type:
    Code: 
    sudo ./nvflash --bl test.ebt --bct testr.bct --blob test.blob
    If you got this command:
    Code: 
    command error: no command found
    Then try this one instead:
    Code: 
    ./nvflash --setbct --create --configfile <your flash.cfg> --bl test.ebt --bct testr.bct --blob test.blob
    If you got the NvError, its fine.
    Something like this should appear (the first command):
    Code: 
    Nvflash v1.13.87205 started
Using blob v1.13.00000
chip uid from BR is: 0x0000000000000000015d2bc285340e0f
rcm version 0X30001
System Information:
   chip name: unknown
   chip id: 0x30 major: 1 minor: 3
   chip sku: 0x83
   chip uid: 0x0000000000000000015d2bc285340e0f
   macrovision: disabled
   hdcp: enabled
   jtag: disabled
   sbk burned: true
   dk burned: true
   boot device: emmc
   operating mode: 4
   device config strap: 1
   device config fuse: 17
   sdram config strap: 0

sending file: recovery.bct
- 6128/6128 bytes sent
recovery.bct sent successfully
downloading bootloader -- load address: 0x80108000 entry point: 0x80108000
sending file: bootloader.ebt
- 2146912/2146912 bytes sent
bootloader.ebt sent successfully
waiting for bootloader to initialize
bootloader downloaded successfully
    A Google Logo should appear on your device screen with the text "Battery is too low" on the upper left corner. Unplug the battery and replug it. After that, plug it into a wall charger for atleast 4 hour.
    Step 4: Unplug the battery and boot into APX mode again using the button combination.
    Step 5: Type this command while holding down the Vol DOWN button:
    Code: 
    sudo ./nvflash --resume --download 8 boot.img
    Replace "boot.img" with your ROM boot.img file. If you download another boot.img that isn't for your ROM, your device will bootloop.
    Step 6:
    Type:
    Code: 
    sudo ./nvflash --resume --download 4 bootloader.img
    Replace "bootloader.img" with your bootloader.img file name (You could get it inside of the Factory Image)
    And after its done, your device should technically unbrick now. But I still recommend you re-flash stock ROM.
    Step 7: The final step
    Boot into your OS using the command below:
    Code: 
    sudo ./nvflash --resume --go
    If your device boot back into APX mode, maybe you have done something wrong. Try again.
    If you got a Google logo on your device then congratulation! Your device is now unbricked.


    Note: If step 7 didn't work, try booting this recovery image using this command:
    Code: 
    fastboot boot flatline_grouper.img
    Link for the recovery image is in the "Links" section.
    Note: To get into Fastboot, add the "--go" line at the end of the command in Step 5
    Code: 
    sudo ./nvflash --resume --download 8 boot.img --go
    HOLD DOWN VOL DOWN while doing this command, you should get into fastboot at
    After you are in the Flatline recovery, navigate to the "Advanced" section using the VOL buttons. Select it using the POWER button.
    Select the "wheelie" at the end of the list.
    Select "I agree".
    After that, select "Step 1: Flash AndroidRoot.mobi custom bootloader." IGNORE Step 2 because it won't gonna work anyways.
    Your device should reboot and the Google logo should appear, that means that your device is unbricked.
    Note: If you wanted to flash stock ROM, open the "image-*******.zip" inside of the factory image and open the android-info.txt file. Edit the "require-bootloader" line to "4.13". After that, it should work.


    Links:
    flash.cfg: http://www.mediafire.com/file/j90hc1dfz58aytq/flashcfg.zip/file
    flatline_grouper.img: https://www.mediafire.com/file/z1jvgy6km33f7bf/flatline_grouper.img/file
    Wheelie, NvFlash and platform-tools (For ADB) (Works for both Linux and Windows): https://www.mediafire.com/file/0nuy4indgvagq3v/nvflash-and-platformtool.zip/file
    Download the Factory Image for your Nexus 7 incase you want to re-flash stock ROM (nakasi or nakasig): https://developers.google.com/android/images#nakasi

    That is. If you need any help, message me.

    Update: After a few days of troubleshooting, fixing and updating my post, it seems like the step to unbrick your Nexus 7 2012 may depends on how did you brick it, what OS version you are running or the condition of your device. So you may have to "think outside the box" sometimes in this guide.
    Update #2: Some helpful advice from @Jirmd with some minor change:
    When you get this error :
    Code: 
    Nvflash v1.10.76762 started
Using blob v1.13.00000
chip uid from BR is: 0x0000000000000000015d4a5f202c0401
rcm version 0X30001
System Information:
   chip name: unknown
   chip id: 0x30 major: 1 minor: 3
   chip sku: 0x83
   chip uid: 0x0000000000000000015d4a5f202c0401
   macrovision: disabled
   hdcp: enabled
   jtag: disabled
   sbk burned: true
   dk burned: true
   boot device: emmc
   operating mode: 4
   device config strap: 2
   device config fuse: 17
   sdram config strap: 1

sending file: testr.bct
- 6128/6128 bytes sent
testr.bct sent successfully
downloading bootloader -- load address: 0x80108000 entry point: 0x80108000
sending file: test.ebt
- 2146896/2146896 bytes sent
test.ebt sent successfully
waiting for bootloader to initialize
bootloader downloaded successfully
setting device: 0 3
failed executing command 11 NvError 0x120002
command failure: create failed (bad data)
bootloader status: specified device is invalid (code: 6) message: nverror:0x4 (0x4) flags: 0
    after this command :

    Code: 
    ./nvflash --configfile flash.cfg --create --bct testr.bct --setbct --bl test.ebt --blob test.blob --sync
    Probably you have broken your internal storage!

    You can probably flash:
    Bootloader image (bootloader.img)
    Kernel image (boot.img)
    Recovery image (recovery.img aka TWRP)

    But you CAN'T flash a new system via TWRP or fastboot, because the bootloader or the recovery was unable to connect to the partitions table.

    You can try this command to erase bad blocks:

    Code: 
    ./nvflash --resume --configfile flash.cfg --obliterate
    Reboot to APX mode and try the above command again.

    But, broken internal storage is pretty much unrepairable.

    There is some possibility of disassembly your device and overheat your memory IC, but this method is not easy and need more technical skill.
    And in my case this did not help.
    Click to expand...
    Click to collapse
    In my case, this command also gives me the nverror 0x4 but it also did something to my Nexus 7 as it was required for the next step.
    Update #3: Updated the guide and removed some unessacery steps.
    Update #4: Updated.
    View
    2
    GedBlake
    GedBlake
    Hi, enderzip...

    I've been keeping track of the recent developments regarding bricked Nexus 7's, APX mode and nvFlash, here on XDA. There's currently quite a few threads on this topic.

    As I understand it, you've been motivated by a desire to recover data from your bootloader bricked Nexus 7. So my question is simple...

    'Have you been successful?'

    Have you actually resurrected a bricked Nexus 7 with no functioning bootloader AND with no originally created flatline wheelie blobs?

    If so, you have done what I thought could not be done! I tip my hat to you, with your tenacity and your technical understanding of the complex issues involved.

    If I had a Linux system myself, I'd be half-minded to dig out my old Nexus 7, deliberately bugger up the bootloader, and follow your instructions for the sheer technical challenge!

    --------------------------------------

    Some general thoughts...

    The Nexus 7 is old (c.2012), and likely not many people use it anymore, but that's not what's important here. What is important is the persistence, the huge technical ability, and the sheer bloody minded refusal ~ by some ~ to let their Nexus 7 die... to go into what the poet Dylan Thomas called that 'good night'...

    "Do not go gentle into that good night,
    Old age should burn and rave at close of day;
    Rage, rage against the dying of the light."
    https://poets.org/poem/do-not-go-gentle-good-night

    And in so doing, mayhap enderzip and others, have provided potential clues for other devices, other hardware, other phones or tablets, when faced with similar hard brick problems. One can but hope.

    The above post by enderzip is technically way beyond me, and I have no immediate use for it, but it's a fundamental distillation of everything XDA stands for - namely, experimentation and creativity.

    It's basically, amazing!

    Thanks enderzip:)

    Rgrds,
    Ged.
    View
    2
    R
    retiredtab
    hasan_1124 said:
    SBK : 4b0ec989167f4beb996ff9d88bdc0022
    Chip UID : 15d07874d3ff807
    Click to expand...
    Click to collapse
    Output.

    Code: 
    # cat cpuinfo 
Processor       : ARMv7 Processor rev 9 (v7l)
processor       : 0
BogoMIPS        : 1993.93

processor       : 1
BogoMIPS        : 1993.93

processor       : 2
BogoMIPS        : 1993.93

processor       : 3
BogoMIPS        : 1993.93

Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x2
CPU part        : 0xc09
CPU revision    : 9

Hardware        : grouper
Revision        : 0000
Serial          : 15d07874d3ff807
# ./mknvfblob -W -K 4b0ec989167f4beb996ff9d88bdc0022 --blob test.blob --bctin n7.bct --bctr testr.bct --bctc testc.bct --blin bootloader.grouper.XBT --blout test.ebt
mknvfblob
---------

Encrypting BL 'bootloader.grouper.XBT' to 'test.ebt'...done.
Generating encrypted recovery BCT from 'n7.bct' to 'testr.bct'...done.
Generating encrypted create BCT from 'n7.bct' to 'testc.bct'...done.
Generating blob file 'test.blob'...done.
Adding create BCT to blob file [wheelie]...done.
Adding recovery BCT to blob file [wheelie]...done.
Adding bootloader to blob file [wheelie]...done.
Adding odmdata to blob file [wheelie]...done.
Adding chip id to blob file [wheelie]...done.
    View
    2
    A
    ak-s
    It’s possible to do this trick on Windows. USB 3.0 is NOT required!

    1. DUMP SBK VIA USB (Windows)
    Step 1. Install the libusbK driver:
    Download Zadig installer https://zadig.akeo.ie/
    Connect your device to USB. You should see a device labeled "APX" in the Device Manager.
    Open the Zadig executable. Select "APX" in the device dropdown list (you may have to enable "List All Devices" in the Options menu). Change the selected driver to libusbK using the arrow icons to the right of Zadig's window. Click "Install Driver" (or "Replace Driver").
    Step 2. Install Python for Windows. If you have a 64-bit system, download "x86-64" installer from https://www.python.org/downloads/windows/
    Step 3. Download fusee-launcher for Nexus 7 and extract it to a folder.
    Replace fusee-launcher.py with the fixed file https://gist.githubusercontent.com/...d4ba1cf3d6232b545ba4c91aed0/fusee-launcher.py
    Step 4. Reconnect your device (just in case).
    Open a command prompt inside of the folder then type:
    Code: 
    python.exe fusee-launcher.py --tty dump-sbk-via-usb.bin
    Find SBK key in the log (refer to the main tutorial).

    2. GETTING YOUR CPU UID (Windows)
    Step 0. Replace APX driver:
    Download and extract Universal Naked Driver https://xdaforums.com/google-nexus-5/development/adb-fb-apx-driver-universal-naked-t2513339
    Open the Device Manager, uninstall the libusbK driver (APX device), then install the extracted one.
    Step 1. ...


    Tested on PC with USB 2.0 ports, Windows 7, Python 3.8.3, Zadig 2.5

    But I don't have a second device.
    Could someone generate the Blob file for me? Pretty please?
    SBK: 3344ff475dce4fb19f0808c496dbc8eb
    Chip UID: 015d8bed314c0603
    View
    1
    enderzip
    enderzip
    GedBlake said:
    Hi, enderzip...

    I've been keeping track of the recent developments regarding bricked Nexus 7's, APX mode and nvFlash, here on XDA. There's currently quite a few threads on this topic.

    As I understand it, you've been motivated by a desire to recover data from your bootloader bricked Nexus 7. So my question is simple...

    'Have you been successful?'

    Have you actually resurrected a bricked Nexus 7 with no functioning bootloader AND with no originally created flatline wheelie blobs?

    If so, you have done what I thought could not be done! I tip my hat to you, with your tenacity and your technical understanding of the complex issues involved.

    If I had a Linux system myself, I'd be half-minded to dig out my old Nexus 7, deliberately bugger up the bootloader, and follow your instructions for the sheer technical challenge!

    --------------------------------------

    Some general thoughts...

    The Nexus 7 is old (c.2012), and likely not many people use it anymore, but that's not what's important here. What is important is the persistence, the huge technical ability, and the sheer bloody minded refusal ~ by some ~ to let their Nexus 7 die... to go into what the poet Dylan Thomas called that 'good night'...

    "Do not go gentle into that good night,
    Old age should burn and rave at close of day;
    Rage, rage against the dying of the light."
    https://poets.org/poem/do-not-go-gentle-good-night

    And in so doing, mayhap enderzip and others, have provided potential clues for other devices, other hardware, other phones or tablets, when faced with similar hard brick problems. One can but hope.

    The above post by enderzip is technically way beyond me, and I have no immediate use for it, but it's a fundamental distillation of everything XDA stands for - namely, experimentation and creativity.

    It's basically, amazing!

    Thanks enderzip:)

    Rgrds,
    Ged.
    Click to expand...
    Click to collapse
    Yes, I have successfully unbrick my Nexus 7 WITHOUT any type of blob file i have generated before.
    And no, you should thank @Jirmd instead of me. If he didn't post his thread, my Nexus is still probably a paperweight.
    View

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