[TriEmbed] Amazon Dash button simple detection

[Pete Soper]

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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