ZählerJs is in alpha state and not ready for production.

Install on raspberryPI

Install NodeJs

• sudo aptitude install nodejs npm
• wget http://nodejs.org/dist/v0.10.22/node-v0.10.22-linux-arm-pi.tar.gz
• tar xvzf node-v0.10.22-linux-arm-pi.tar.gz
• sudo cp -r node-v0.10.22-linux-arm-pi/* /opt/node
• sudo nano /etc/profile

NODE_JS_HOME="/opt/node"
PATH="$PATH:$NODE_JS_HOME/bin"
export PATH

http://blog.rueedlinger.ch/2013/03/raspberry-pi-and-nodejs-basic-setup/ for more infos

Install MongoDB

see http://c-mobberley.com/wordpress/index.php/2013/10/14/raspberry-pi-mongodb-installation-the-working-guide/ for more infos how to install MongoDB on the RaspberryPI.

Install ZählerJS

• cd /opt/
• git clone https://github.com/mvoehringer/zaehlerjs
• cd zaehlerjs
• npm config set registry http://registry.npmjs.org/
• npm install

On Raspberry PI /Debian

• sudo cp -a debian/zaehlerjs.init.sh /etc/init.d/zaehlerjs

• sudo chmod +x /etc/init.d/zaehlerjs

• sudo mkdir /usr/local/var

• sudo mkdir /usr/local/var/run

• sudo update-rc.d zaehlerjs defaults

• sudo chmod +x bin/run.sh

• sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3000 OR authbind node myscript (see http://www.debian-administration.org/articles/386)

Running unit test

http://www.heise.de/developer/artikel/Unit-Tests-mit-Node-js-1823265.html

npm test 

or

mocha 

TODOs

• add unit test for all
• styling: show results as meter and counter
• Zoom-In/Zoom-Out