Original post:

Raspberry pi, install: sudo apt-get install python-scapy tcpdump

Nice theres a scapy python in the apt repository Also had to install tcpdump.

Here's my update, apparently more recent Amazon software configures the Dash button with a dhcp address, so the psrc='0.0.0.0' fails.

My hacky solution:

Update 2018: Apparently somebody deprecated something and the above no longer works. An exceptionally crude hack is to just ping the various buttons, when they go on-line the ping will succeed and you can trigger something. Yucky but works?