I recently developed an electronic project to control power outlets with my smartphone, from anywhere in the world. It was a great challenge for me, as this is my largest project with an Arduino so far.
Basically I used a cheap 3-pack remote controlled power outlets (around $12), then I connected the remote to my Arduino and with an Ethernet module I connected all that to the Internet.
PasiO:
Not sure why you used the relay module to interface with the remote control?
He is basically replacing the buttons on the remote. I guess that's one way to do it, as if he wanted to connect directly using the pins on his board he would need to have the same voltage as the remote uses.
It's a cool solution, even though you've made a remote for a remote If I were you I'd remove the enclosure for the remote and mount the boards somehow, but it works well as it is.
OscarLimaEcho:
he would need to have the same voltage as the remote uses.
Ah, I overlooked the chance of having different voltages, I was lucky enough to have 5V on the remote I hacked into. Though if the remote was working with logic below 5V (which would be likely?), you could still possibly work without extra components (if the pin on the remote was to be driven low) or with a resistor divider (if pin to be driven high).
Anyway, glad he did it that way... gave me an idea for a future project:)
If I were you I'd remove the enclosure for the remote and mount the boards somehow, but it works well as it is.