[TriEmbed] Amazon Dash button simple detection

Mon Jul 25 20:18:59 CDT 2016

Pete,

Indeed there are many ways, each with its own advantages.  I now have a
doorbell that super flexible.

Is anybody interested in a tool to program the version 2 dash buttons?
Seems like the protocol is pretty straight forward, save for one call for a
token.  Version 1 buttons have a web page you can program them on.

Mike

On Sun, Jul 24, 2016 at 2:58 PM, Pete Soper <pete at soper.us> wrote:

> 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>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>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
>>>
>>> _______________________________________________
>>> Triangle, NC Embedded Computing mailing list
>>> TriEmbed at triembed.org
>>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>> TriEmbed web site: http://TriEmbed.org
>>>
>>
>>
>>
>>
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>>
>>
>>
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>
>
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