Turning on/off the lamp from a smartphone

Our home automation project is nearly finished, but one important thing remains: we need to ensure that it's possible to control the light using a remote device, such as a smartphone. First of all, we need to check on the board whether the web server is present:

$ ps | grep server
295 root 2732 server.init

If the server for some reason hasn't auto-started, we can try to manually start it using this command:

$ /etc/init.d/server-packt-init start
starting Nodejs app: server.init... done.
root@raspberrypi2:~#    info  - socket.io started
listening on *:3344

If we manually perform some changes to the web server directly on the Raspberry Pi, we can restart the web server by using this command:

$ /etc/init.d/packt-server restart
stopping Nodejs app: server.init... stopped node (pid 295)
done.
starting Nodejs app: server.init... done.

Now, we can start the web browser on our smartphone and go to http://my_rpi_ipaddress:3344. You will see the same...