[TriEmbed] Amazon Dash button simple detection
Pete Soper
pete at soper.us
Sun Jul 24 13:58:18 CDT 2016
Hi Mike,
Cool. Many ways to skin this cat. Let's not forget to fret about it's
bluetooth radiation. All .001 watts. :-)
For our further amusement, here are FCC records for the Dash units I have:
FCC exhibits for 2AETK-1013 (model JK29LP)
<https://apps.fcc.gov/oetcf/eas/reports/ViewExhibitReport.cfm?mode=Exhibits&RequestTimeout=500&calledFromFrame=N&application_id=dxg92UFnj11r21%2BxCAQtiQ%3D%3D&fcc_id=2AETK-1013>
FCC exhibits for 2ACBE-0610 (model JK76PL)
<https://apps.fcc.gov/oetcf/eas/reports/ViewExhibitReport.cfm?mode=Exhibits&RequestTimeout=500&calledFromFrame=N&application_id=dxg92UFnj11r21%2BxCAQtiQ%3D%3D&fcc_id=2ACBE-0610>
Both waver forms are dated January of this year.
I have two of the JK29LPs and they weigh 30 grams. My other six are the
JK76PL and they weigh 26 grams. (playdoh are 29s, solidgold, gatorade,
and chlorox are 76s). I took one of the heavier ones apart. Are these
small torx screws! I'm missing my decent Dremel saw and kind of
butchered the plastic with the next best thing. And the switch now
requires a ball point pen to press. :-)
I'll take a 76PL apart as soon as I avoid death by wife by finishing
fixing her car. I'm interested in doing this now, as it appears some of
these things have Atmel chips in them vs ST.
-Pete
On 07/24/2016 11:56 AM, Michael Monaghan wrote:
> My wifi router is doing all the work...
>
> - Added new AP "dash"
> - Route "dash" AP to Internet
> - Setup Dash buttons. stopping at the product selection screen. (Note
> this can be skipped if you manually configure the button)
> - Cut AP "dash" from Internet
> - Changed DHCP logging to include "Request" and ARP
> - Scan log from Python for new events
> - Do whatever I please. Push Dash mounted as doorbell to send sounds
> to TV and music players plus send SMS that someone is at the door...
> turn on porch light and take a picture... electrify porch rails with
> the cattle tamer...
>
> Advantages:
>
> - The AP is always on and the Dash are connecting to it anyways
> - Separate SSID keeps them off my data SSIDs plus the entire AP
> configuration of the Dash is done in the open where anyone with a
> sniffer can capture it. The Dash SSID is not routers and therefore
> goes nowhere if someone gets into it.
> - Script doesn't have to deal with all the usually network traffic
> - Dash buttons can't call home.
> - I can use them once to get my $5 credit. The Energizer button paid
> me $0.17 to take a 16 pack of AAs off Amazon's hands after the cost of
> the AA and button.
> - It was so simple!
>
> Note that you can also telnet to talk with the button and configure it
> outside of the Amazon app. V1 buttons have a configuration screen via
> HTML. V2 buttons require special JSON requests (not complex) to pull
> the AP list and then set the base configuration. Using this method
> you never have to talk to Amazon's servers. The major advantage to
> this is you aren't sharing your SSID and Key with Amazon.
>
> Note if anyone is looking for a button to play with, I'll have a few
> at the next meeting.
>
> Mike
>
>
>
>
>
> On Sat, Jul 23, 2016 at 11:58 PM, Pete Soper via TriEmbed
> <triembed at triembed.org <mailto:triembed at triembed.org>> wrote:
>
> To fill in a few blanks, the scapy-dependent Dash detector
> involving diaper logging that a ton of other implementations copy
> (including the one Rod pointed to) is here
> <https://medium.com/@edwardbenson/how-i-hacked-amazon-s-5-wifi-button-to-track-baby-data-794214b0bdd8#.1opwy0u3c>.
> For whatever reason (router seems the only suspect) that code does
> not work for me except for the very first time a Dash is used, at
> the point the router sees it's MAC address and gives it an IP via
> DHCP.
>
> Rather than figure out why it doesn't work for me or try a similar
> implementation like the one Rod pointed to, I'm using arpalert
> <http://arpalert.org>, a relatively simple program that detects
> ARP traffic and executes an arbitrary, configured program with the
> MAC address as an argument (example shell script below). It has no
> dependencies beyond standard network libraries and is just exactly
> what I'm after, and maybe others would find it useful too. But it
> has to be built from source and there are a few wrinkles not
> covered by the English readme. But for an expedient solution I
> contend the previous shell script I shared is as easy as an
> implementation is likely to get. :-)
>
> Here's an example program that arpalert can invoke when a Dash is
> pushed. The "button" variable assignment could be replaced by any
> arbitrary button-specific action, for instance Python code that
> does the whatsit transaction on the IFTTT Maker Channel, Raspberry
> Pi code to pull a GPIO line, etc. While I'm testing it the script
> just logs which Dash was pushed.
>
> #!/bin/sh
>
> case $1 in
>
> (f0:27:2d:d8:26:ad) button='gatorade1';break;;
>
> (44:65:0d:14:1e:fb) button='playdoh2';break;;
>
> (f0:27:2d:bc:be:65) button='chlorox2';break;;
>
> (f0:27:2d:f9:36:d5) button='gatorade2';break;;
>
> (a0:02:dc:22:57:a7) button='chlorox1';break;;
>
> (f0:4f:7c:e8:ec:60) button='solidgold1';break;;
>
> (44:65:0d:21:d8:45) button='playdoh1';break;;
>
> (74:c2:46:9a:13:bc) button='solidgold2';break;;
>
> esac
>
> date >>/tmp/log
>
> echo $button >>/tmp/log
>
>
> -Pete
>
>
> On 07/23/2016 04:53 PM, Pete Soper via TriEmbed wrote:
>> In the past couple days I've looked at a lot of different
>> implementations. I'm not willing to spend the time to determine
>> whether that one suffers the same issue that keeps the other
>> scapy-dependent implementation from working here. IMO arpalert
>> <http://www.arpalert.org/arpalert.html> is an excellent tool for
>> this application.
>>
>> -Pete
>>
>> On 07/23/2016 04:42 PM, Rodney Radford wrote:
>>> Pete,
>>>
>>> Have you seen this method that simply relies on the ARP requests
>>> by MAC address? Similar to where you are heading, but this is
>>> already complete and appears ready to us..
>>>
>>> https://familab.org/2016/02/hacking-the-amazon-dash-button-to-make-a-simple-cheap-iot-place-anywhere-networked-button-3/
>>>
>>>
>>> On Sat, Jul 23, 2016 at 4:02 PM, Pete Soper via TriEmbed
>>> <triembed at triembed.org <mailto:triembed at triembed.org>> wrote:
>>>
>>> OK, after wading through some cosmically complex
>>> implementations of "detect the button push" and finding the
>>> trivial Python program of the seminal how-to involving baby
>>> diaper use only works in my house for the very first button
>>> press, I wondered if these things would respond to pings
>>> while they're winking and blinking. They do. Then I wondered
>>> if they remember to request the same IP address over and
>>> over. They do. So, in my house, where the DHCP environment
>>> is very stable for the main LAN, I can arrange for a
>>> completely reliable mapping of button to IP address. So I
>>> can just use the shell script below for a trivial means of
>>> detecting a button. The script puts no measurable load on
>>> the computer I tried it on. I'm arranging a proper scheme
>>> that keys off MAC addresses to be immune to DHCP behavior
>>> using arpalert, but in the meantime I thought the group
>>> might find this script amusing. (I'll publish the
>>> arpalert-based scheme when I've worked out some patches to
>>> that code to get a few issues out of my face and some
>>> utilities to automate the process a bit).
>>>
>>> To use this little script I I set up a button as usual and
>>> either use the diaper-logger's Python script or simply look
>>> at the router's admin interface to see the IP address
>>> dispensed. I then put that in my /etc/hosts file with a name
>>> and use that in the script below. Making this script general
>>> (e.g. taking the IP and text/action as parameters) would of
>>> course be the next step with this approach. Anyway, this
>>> script might be of interest to folks that just want to play
>>> vs installing scapy or a hundred Javascript modules. I'
>>> about 99 3/4% sure this would work on Windows using Cygwin.
>>>
>>> One interesting side effect of setting up a bunch of buttons
>>> is that my phone is simply filled with reminders about the
>>> fact that I never selected a product for each button. So I
>>> would add to the usual instructions out on the net "after
>>> setting up the last button, uninstall the Amazon app!"
>>>
>>> #!/bin/sh
>>>
>>> while [ /bin/true ] ; do
>>>
>>> ping -w 1 -c 1 gatorade1 >/dev/null 2>&1
>>>
>>> if [ $? -eq 0 ] ; then
>>>
>>> echo "You can get your own Gatorade" | espeak --stdin
>>>
>>> # make sure we don't double trigger
>>>
>>> sleep 10
>>>
>>> fi
>>>
>>> done
>>>
>>>
>>> -Pete
>>>
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>>>
>>>
>>
>>
>>
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