Attention span of a mouse in an owl pellet? Hack your memoto (clip 1 only!) by:
sudo apt-get install python3.4 libusb-1.0-0 git # or use your favorite installer
git clone https://github.com/walac/pyusb # install pyusb for usb.core
cd pysub
sudo python setup.py install
cd ..
git clone https://github.com/mrquincle/memoto # install this repos
cd memoto
sudo python memoto.py list /mnt/storage
sudo python memoto.py upload /mnt/storage/ .dev_options.dat
# reconnect the USB cable
# set static IP (disable DHCP!)
sudo ifconfig usb0 192.168.2.10 netmask 255.255.255.0 broadcast 192.168.2.255
telnet 192.168.2.2 # the memoto device is at IP address 192.168.2.2
# 192.168.2.10 is the address you assign to usb0 in order access the memoto at IP 192.168.2.2
If you can't figure it out, please ask your questions at https://github.com/mrquincle/memoto/issues.
More about this lifelong logging camera can be read on http://getnarrative.com/ and https://www.kickstarter.com/projects/martinkallstrom/memoto-lifelogging-camera.
Of course I got this one from Kickstarter and I quickly figured out that I needed Windows or MacOS to be able to use it. Windows isn't good for my heart, and MacOS isn't good for my wallet. Hence, I led one of my interns use it for a while to check if she could get some useful data with respect to logging eating and drinking habits. She is an industrial design student with the assignment to break such habits with the invention of a smartphone addon. Remarkable by the way that there are so many wristbands and smartwatches to measure activity, but so few devices that look at intake - or later in the digestive process :) - or habit breaking c.q. establishing technological aids.
Anyway, finally I found some time to start hacking the Memoto. Note, this hack only is about reading from the device using the custom firmware on it. This is not reading out that firmware, or reverse engineering the firmware on the device itself.
The following will be some description of the hack, but you can also just clone this repository and start using it. What you will be able to do:
- download files from the Memoto using the python script
memoto.pyusing a Linux operating system (might be working on other platforms as well, just try it out and report back) - upload files to the Memoto using the same script
memoto.pyusing a Linux operating system - enable a
developmentaloption on the Memoto - subsequently the Memoto becomes available in a normal fashion to almost all modern operating systems
- change the frequency with which you snap pictures
- use the Memoto as a fancy USB drive which also happens to take pictures
So, you know it was a success before you've to read this long story. :-)
The setup is easy to imagine. We have to run a VirtualBox with Windows 7. First hurdle needs to be taken. By default VirtualBox does not support USB 2. You will need an extension pack.
$> VBoxManage list extpacks
Extension Packs: 1
Pack no. 0: Oracle VM VirtualBox Extension Pack
Version: 4.3.20
Revision: 96996
Edition:
Description: USB 2.0 Host Controller, Host Webcam, VirtualBox RDP, PXE ROM with E1000 support.
VRDE Module: VBoxVRDP
Usable: true
I installed this extension pack, but apparently my newest OS updated VirtualBox, but not the extension pack, so make
sure you use VBoxManage list extpacks to check if it states Usable: true. Next in the VirtualBox, you will have to
check Enable USB 2.0 (EHCI) Controller. It might be useful to add the memoto to the USB Device Filters. You will
see it show up as Narrative Clip [0108]. This makes it automatically connect to the Windows 7 instance, really neat!
When debugging though, you might want to turn it off, because after every unfortunate accident, the port or the device
resets itself, which makes Windows 7 grab it. And you'll have to unmount every time you want to read or write from it
from your host.
On the host set up wireshark. On a fairly recent kernel this is super simple and you can skip almost everything on their wiki:
sudo modprobe usbmon
# the following is your usbmonX number to use in wireshark
lsusb -d f0f0:1337 | cut -f2 -d' '
python memoto.py upload /mnt/storage/ .dev_options.dat
In my case it connects to Bus 3, so let's start capturing in wireshark on /dev/usbmon3.
Now, it is time to install everything from Memoto / Narrative in the Windows 7 instance. Connect your device and look at all the USB traffic and get yourself a nice cup of coffee. I recommend Moyee Coffee, the first fair-chain rather than just fair-trade coffee available.
Just got this Missile Launcher for christmas. I've to use it from Linux as well of course. Searching online quickly brings up ml-driver. It happens to be that Matthias Vallentin not only had the same problem, but also thought, what the heck, let I learn something from it, and write a kernel driver for fun. After a few small adaptations this worked like a blast.
Of course nowadays you actually don't need to write a kernel driver, with libusb you're pretty much set. I found this python script retaliation which allows you to set up it such that commands can be send over UDP, neat. Python I normally never use, but for scripting I like it quite a lot. So, I start with the code from Retaliation although you might find nothing anymore from the original code. If you're a Python afficionado I probably will accept any pull request. :-)
First, probe the thing a bit more.
$> lsusb -vvv -d f0f0:1337
Bus 003 Device 045: ID f0f0:1337
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0xf0f0
idProduct 0x1337
bcdDevice 1.08
iManufacturer 1 Narrative
iProduct 2 Narrative Clip
iSerial 3 82394893248932943093934204a48b99
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 4 Narrative USB #1
bmAttributes 0xc0
Self Powered
MaxPower 450mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 5 Narrative Clip
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0001
Self Powered
Here you see that there are two endpoints. Both are of the bulk type. The end point that is used to obtain the
files from the device are obtained from endpoint 0x81.
The files are stored in the folder /mnt/storage. There will be .jpg files in there as well as .meta.json files.
This folder has subfolders such as 140804_02, and the files have iSerial as part of their filename.
You can use the script memoto.py to get a listing of files on the device. Not all directories are accessible though.
To list the files in the storage directory:
python memoto.py list /mnt/storage
This will give you a list like the following
140802_13
141231_07
140731_17
.gfs_options.dat
upgrade_log_140723_125516.txt
lost+found
hw_revision
upgrade_log_070101_000636.txt
.timestamp
os-release
error_log.txt
upgrade_log_141230_131052.txt
Subsequently, you can take a look in the directories:
python memoto.py list /mnt/storage/140802_13
To actually obtain a file:
python memoto.py file /mnt/storage/ upgrade_log_140723_125516.txt
Note that here there is a space between the path and the file. Also note that there is a trailing '/'. I've to make all these things idiot proof later.
To obtain all files in a certain directory, run:
python memoto.py files /mnt/storage/140802_13
However, this is a difficult one. That I couldn't script properly in a few hours without loosing some BULK request/ response messages. So, don't be surprised if there are .jpg files in the .meta.json files, etc.
What we need to do now is to upload a file. We are gonna upload a file using 0x10 instead of 0x09 (see code in
python script). Specifically, we are gonna upload the file /mnt/storage/.dev_options.dat. Its content is simply:
"ether": true
Upload it through;
python memoto.py upload /mnt/storage/ .dev_options.dat
Reconnect your device and suddenly you will see another interface appearing if your kernel supports usbnet. This will all be automatically triggered, pretty neat from the kernel guys!
The device is at 192.168.2.2. A port scan reveals:
PORT STATE SERVICE VERSION
21/tcp open ftp BusyBox ftpd (D-Link DCS-932L IP-Cam camera)
23/tcp open telnet
And sure ftp 192.168.2.2 and telnet 192.168.2.2 works just fine.
A directory list can be found in this file. Sorry, the command tree wasn't in their busybox installation, so it doesn't look so nice. :-)
I understand that some people are really anxious in getting the GPS working properly. There is a file /etc/init.d/S56aclys which inserts the kernel module /lib/modules/2.6.39+/extra/aclys_gpio.ko. The aclys_snap file in /bin is quite small, just 15kB. So, there is no encryption done or things like that. Those snap files you can retrieve from the device is probably just raw data from the sensor.
There is a memotod binary in /bin. This is only 62kB and seems to contain also very little. Most of the code is dedicated to reading the sensors and pushing it to the host device using Linux-USB Gadget framework or gadgetfs. This is a pretty neat piece of code that allows you to communicate through just reading and writing to /dev/gadget.
To make sure that there is no new firmware uploaded that would make the above impossible, I would recommend to either
deinstall the Memoto software or change one of the scripts on the memoto that is responsible for installing new
firmware. New firmware comes in a tar ball update.tar which unpacks to update/update.sh. Just remove those lines
in the script. This has a nice side-effect that if new firmware is send over by Memoto that it will be available at
your service, without it getting installed. You can casually inspect what great updates are in there before you start
using it. :-)
To be done. Read the python script for now
Note that this is done independently by some random developer not associated with Memoto / Narrative. I have refrained
from publishing their .lua and .sh scripts here, you can get them yourself if you want to. Their names are their
respective trademarks, etc. etc. I think the Narrative Clip is a neat piece of hardware and I'm grateful for them to
have developed such a tiny camera package. I hope you guys will come up with nice new ways to use the Memoto just
as with the Kinect, in ways not anticipated before. Note also that there have not been serious encryption measures put
in place. Hence, it is likely that something similar to the Kinect has been the underlying line of thought. The Kinect
was easy to hack on purpose (see articles from the original designer) and this indeed opened up a flurry of very
interesting third-party applications. I sincerely hope that this might as well initiate a much large set of
applications than currently available from which the Narrative people benefit as well. Start coding!
- Author: Anne van Rossum
- License: LGPLv3, BSD, Apache, MIT, your choice
- Date: 31st of December, 2014, 22:56 - I'm now gonna celebrate :-)
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