Polish the readme and the deployment script.

README.md

@@ -1,8 +1,16 @@
 This is a Tornado project reading from MCP3008 ADC using raspberry pi.
+There is a MQ135 sensor on channel 0, a MQ138 on channel 1, and a Sharp dust sensor on channel 2.
+More information/documents can be found on the [blog post](https://grapeot.me/smart-air-purifier.html).
 
 ## SPI
 
 * Need to first enable by running `sudo raspi-config`.
-* Python requires package spidev
+* Python requires package `spidev`.
 * Example: [link](http://jeremyblythe.blogspot.ca/2012/09/raspberry-pi-hardware-spi-analog-inputs.html)
-* We also have code [here](https://bitbucket.org/grapeot/gassensorapi).
+
+## Usage
+
+* Tested on Raspbian
+* Use `deploy.sh` to install dependencies.
+* Use `launch.sh` to launch.
+* Visit `http://<YOUR PI IP>:5000/` to check the visualization.

deploy.sh

@@ -1,9 +1,16 @@
 # install python dependencies
 sudo apt-get update
-sudo apt-get install python3-dev python3-pip
+sudo apt-get install python3-dev python3-pip swig2.0
 pip3 install spidev rpi.gpio
+# Compile and install the wiringpi library, detailed instructions available at https://github.com/WiringPi/WiringPi-Python
+git clone https://github.com/WiringPi/WiringPi-Python
+cd WiringPi
+swig2.0 -python -threads wiringpi.i
+sudo python3 setup.py build install
+cd ..
 
 # install nodejs + pm2 to launch
 curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.0/install.sh | bash
 nvm install node
 npm install -g pm2
+