Add missing build packages to snapcraft.yaml; Update README.md

README.md

 DeviceOps Hello World
 ====
-Example of snapped Node.js application for communications with Nordic Thingy:52.
\ No newline at end of file
+Example of snapped Node.js application for communications with [Nordic Thingy:52](https://www.nordicsemi.com/eng/Products/Nordic-Thingy-52).
+The application is daemon which discovers Nordic Thingy:52 and resends data to MQTT Broker according to the [config file](./config.json).
+
+## Configuration
+
+Configuration file: [./config.json](./config.json)
+ 
+ * `ble` - section store configuration related with Bluetooth
+ * `ble.deviceMac` - string can be `"*"` and connects to any available Nordic Thingy:52 or `"CF:AA:13:A1:5C:A5"` and connects to particular device
+ * `mqtt` - configuration of connection to MQTT Broker
+ * `mqtt.topic` - can contain placeholder `{hostname}` which will be replaced by gateway hostname on application startup
+
+## Prerequisites
+
+Make sure you have [Node.js](http://nodejs.org/) (>=6.11.4) installed.
+This application is using [Nordic-Thingy52-Nodejs](https://github.com/NordicPlayground/Nordic-Thingy52-Nodejs) to handle the Bluetooth connection.
+
+#### Linux
+
+ * Kernel version 3.6 or above
+ * ```libbluetooth-dev```
+
+#### Ubuntu/Debian/Raspbian (locally)
+
+```sh
+    sudo apt-get install bluetooth bluez libbluetooth-dev libudev-dev
+```
+
+## Running locally
+```sh
+    git clone git@git.rigado.com:cascade/deviceops-hello-world.git
+    cd deviceops-hello-world
+    git checkout develop
+    npm install
+    npm run start
+```
+
+## Building snap
+
+#### RPI3 Ubuntu Core 16.04 (armhf)
+
+ * Setup [development tools](https://developer.ubuntu.com/core/get-started/developer-setup) (snap classic)
+ * ```sh
+   snap install classic --edge --devmode
+   sudo classic
+   sudo apt update
+   sudo apt install snapcraft build-essential git```
+ * Install [BlueZ](http://www.bluez.org/)
+ * ```sh
+   snap install bluez
+   snap connect bluez:bluetooth-control```
+ * Go to the project directory run: ```snapcraft```
+ * Result file is `./deviceops-hello-world_0.0.1_armhf.snap`
+
+## Installing snap
+
+#### Rigado VESTA200B Ubuntu Core 16.04 (armhf)
+ 
+ * Setup edge packages:
+```sh
+    snap install rigado-edge-connect --edge --devmode
+    snap connect rigado-edge-connect:bluetooth-control
+    snap connect rigado-edge-connect:physical-memory-control
+```
+ * Install [BlueZ](http://www.bluez.org/)
+```sh
+    snap install bluez
+```
+ * Copy `./deviceops-hello-world_0.0.1_armhf.snap` in to the gateway home directory.
+ * Run install command: `sudo snap install ~/deviceops-hello-world_0.0.1_armhf.snap --devmode --dangerous`
+
+## Troubleshoot
+
+#### HCI Devices list is empty
+
+ * `sudo bluez.hcitool dev` show empty list of devices. 
+ * `dmesg | grep blue` show: 
+```
+    [ 1447.938933] audit: type=1400 audit(1522961095.899:76): apparmor="DENIED" operation="create" profile="snap.bluez.hcicofig" pid=4254 family="bluetooth" sock_type="raw" protocol=1 requested_mask="create" denied_mask="create"
+```
+ * Reinstall [BlueZ](http://www.bluez.org/) with `--devmode` flag:
+```sh
+    snap install bluez --devmode
+    snap connect bluez:bluetooth-control
+```
+ * Enable HCI devices:
+```sh
+    sudo bluez.bluetoothctl
+    power on
+    scan on
+```
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snapcraft.yaml

@@ -13,6 +13,8 @@ parts:
       - libudev-dev
       - libbluetooth-dev
       - python
+      - g++
+      - make
       - bluez
 
 apps:
@@ -23,6 +25,4 @@ apps:
     plugs:
       - home
       - network
-      - bluez
       - bluetooth-control
-