Update readme

README.md

 Dash Button SHM Controller
 ==========================
 
-A node.js module to control [Samsungs SmartThings' Smart Home Monitor](https://support.smartthings.com/hc/en-us/articles/205380154-Smart-Home-Monitor) using an [Amazon Dash button](https://www.amazon.com/Dash-Buttons/b?ie=UTF8&node=10667898011).
+A node.js module to control [Samsungs SmartThings' Smart Home Monitor](https://support.smartthings.com/hc/en-us/articles/205380154-Smart-Home-Monitor) using an [Amazon Dash button](https://www.amazon.com/Dash-Buttons/b?ie=UTF8&node=10667898011) and [Home Assistant](https://home-assistant.io/).
 
-**This library requires that SHM is accessible over MQTT, as discussed [here](https://ethitter.com/2016/08/smartthings-smart-home-monitor-shm-mqtt-home-assistant/).** In turn, it requires the [SmartThings MQTT Bridge](https://github.com/stjohnjohnson/smartthings-mqtt-bridge).
+**This library requires that SHM is accessible to Home Assistant via MQTT, as discussed [here](https://ethitter.com/2016/08/smartthings-smart-home-monitor-shm-mqtt-home-assistant/).**
 
 ## Prerequisties
 
-
+* [Home Assistant](https://home-assistant.io/)
+* [SmartThings MQTT Bridge](https://github.com/stjohnjohnson/smartthings-mqtt-bridge)
+* [SmartThings SHM MQTT Bridge](https://ethitter.com/2016/08/smartthings-smart-home-monitor-shm-mqtt-home-assistant/)
 
 ## Install
 
@@ -20,4 +22,5 @@ Follow Amazon's instructions to configure your button to send messages when you
 ## Configuration
 
 1. Discover the Dash Buttons using `node node_modules/node-dash-button/bin/findbutton`.
-1. Rename `config-sample.json` to `config.json`.
+1. Rename `config-sample.json` to `config.json`. Update its values to match your configuration, including the buttons discovered in the last step.
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+3. Start the listener with `npm start`.
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