Dash button to MQTT bridge

Simple dash button interceptor. Take IP address of the dash button and send a configured message to a MQTT server. Beware that the dash button has a delay of 2~3 seconds on each press. This because the dash button is connecting every time to the WiFi. Tested on VIM2 Khadas (Arm64) with CentOS 7.4.

Dash button

A way to keep the WiFi settings. Let the assistant run through the Amazon App and then simply cancel the selection of the product you want to order.

Setup

Copy files

dashbutton to /usr/local/bin/
doc/dashbutton.xml to /usr/local/etc/dashbutton/
etc/dashbutton.service to /etc/systemd/system/

Modify dashbutton.xml

Adjust IP addresses (should be fixed/static addresses), topic and messages according your needs.

Redirect dash button request

Redirect host names the dash button is connecting to, to the host the dashbutton interceptor is running.

Currently following host names are used

parker-gw-eu.amazon.com
dash-button-na.amazon.com
dash-button-eu-aws-opf.amazon.com

Additionaly NTP server of amazon can be blocked. Dash button is asking for current time first before sending a request to amazon.

0.amazon.pool.ntp.org
1.amazon.pool.ntp.org
2.amazon.pool.ntp.org
3.amazon.pool.ntp.org

Start dash button interceptor

systemctl start dashbutton
systemctl enable dashbutton keep dash button running after restarting
systemctl status dashbutton check that dashbutton is running and listen for messages

Build

Using ASIO in STANDALONE mode because CentOS 7 on arm64 providing an older version of boost::asio.

$ git clone --recursive https://github.com/THKDev/dashbutton.git
$ cd dashbutton
$ mkdir release
$ cd release
$ cmake -DCMAKE_BUILD_TYPE=Release ../ 
$ make
$ bin/dashbutton --help