--- a/README.md	Fri Jan 19 11:54:24 2018 -0600
+++ b/README.md	Fri Jan 19 12:01:14 2018 -0600
@@ -1,5 +1,18 @@
 # Raspberry Pi Homekit Door Accessory
 
+Using
+a
+[Raspberry Pi Zero W](https://www.raspberrypi.org/products/raspberry-pi-zero-w/) and
+[Pimoroni Automation pHAT](https://shop.pimoroni.com/products/automation-phat),
+make a simple circuit-based door lock and door bell intercom into a
+Siri controlled smart accessory. Siri integration is provided
+by [HAP-NodeJS](https://github.com/KhaosT/HAP-NodeJS).
+
+## Installation
+
+Installation is complex and handled by
+an [Ansible](https://ansible.com/) playbook.
+
 ## Ansible Inventory
 
 `inventory/host_vars/raspberrypi.local.yaml`
@@ -10,3 +23,7 @@
     wpa_networks:
       - ssid: "<your ssid>"
         psk: "<your wifi password>"
+
+## Run Ansible
+
+`ansible-playbook hap.yaml`