Hello, i'm not english speaking so please understand my mistakes.
Mine was just an idea, i was curious, i googled some hours but there were a problem: i didn't found a pre-made script :)
I started from a script found on a website, but it was made for one relay, so i remade it.
This instructable is made for 4 relays but you can add how many you want.
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Step 1: Materials Needed
Step 2: Wire the Relays to the Arduino
Now you have to wire the Arduino and the relay module.
Arduion VCC <-----> Relay module VCC
Arduino GND <-----> Relay module GND
Arduino pin 11 <-----> Relay IN1 Pin
Arduino pin 10 <-----> Relay IN2 Pin
Arduino pin 9 <-----> Relay IN3 Pin
Arduino pin 8 <-----> Relay IN4 Pin
Step 3: Program the Arduino
Download the script and transfer it to your Arduino
Step 4: Setup Processing
Run processing, download and open the script.
Edit the COM port if necessary.
Step 5: Setup TouchOSC
Now we need to setup touchOSC, you can find your host by typing ipconfig on cmd if you are under Windows
Step 6: Upload the TouchOSC Interface
Now with touchOSCeditor open the 4relaycontol.touchosc file and press the Sync button, once pressed on the phone app go to Layout and press Add
Step 7: Test
Run the script on Processing by pressing the "Play" button and connect with your phone.
Press the buttons, if everythig is working the relays will change their status.