Controlling Bye Bye Standby devices using an Arduino

Note: Since the receivers are learning and the old Bye Bye units had a switch to select the channel and a 'house code' I don't know if all the transmitters are the same. It would make sense if they were not otherwise two neighbours could interfere with each others devices. Therefore the codes below probably wont work straight away but you could teach your devices to use these codes. If you wish to still use your existing remote then take a look at my next blog which gives instructions on how to decode the RF signal yourself.

First you will need a 433Mhz RF transmitter which can be bought cheaply off ebay. You will also need to download the RCSwitch library.
The Bye Bye Standby units use a quad state code which the RCSwitch library does not support. However on Tinkerman's blog he details the few changes that need to be added to get this supported. Its a very good blog so well worth reading any way.
The RF transmitter can work with a supply voltage up to 12V and with a good antenna can have a range of many hundreds of meters. A good option when interfacing with an Arduino is to run it off the built in 5V supply and solder a 17cm long wire to the antenna pad. I found that I was able to reliably control a device behind the TV in the front downstairs room from the back bedroom.
Next all you need are the codes for the Bye Bye Standby which I have included in the following sketch.

#include <RCSwitch.h>
#define MAX_STRING_LEN 25

RCSwitch mySwitch = RCSwitch();
String lineinput = "";

void setup() {
  Serial.begin(9600);
  mySwitch.enableTransmit(10);
  mySwitch.setProtocol(1);
  mySwitch.setRepeatTransmit(10);
  mySwitch.setPulseLength(300); // Bye Bye Standby
}

void loop() {
  while (Serial.available() > 0)
  {
    char c = Serial.read();
    if (c != '\n')
    {
      lineinput += c;
    }
    else {
      // handle entered data or request
      Serial.println("Entry='" + lineinput + "'");
      lineinput.trim();
      if (lineinput == "1on")
      {
          mySwitch.sendTriState("X0X1F00XXX11");
      }
      if (lineinput == "1off")
      {
          mySwitch.sendTriState("X0X1F00XXXF1");
      }
      if (lineinput == "2on")
      {
          mySwitch.sendTriState("X0X1F00XXX1F");
      }
      if (lineinput == "2off")
      {
          mySwitch.sendTriState("X0X1F00XXXFF");
      }
      if (lineinput == "3on")
      {
          mySwitch.sendTriState("X0X1F00XXXX1");
      }
      if (lineinput == "3off")
      {
          mySwitch.sendTriState("X0X1F00XXX01");
      }
      if (lineinput == "4on")
      {
          mySwitch.sendTriState("X0X1F00XXX1X");
      }
      if (lineinput == "4off")
      {
          mySwitch.sendTriState("X0X1F00XXXFX");
      }
      if (lineinput == "5on")
      {
          mySwitch.sendTriState("X0X1F00XXX10");
      }
      if (lineinput == "5off")
      {
          mySwitch.sendTriState("X0X1F00XXXF0");
      }
      if (lineinput == "6on")
      {
          mySwitch.sendTriState("X0X1F00XXXXX");
      }
      if (lineinput == "6off")
      {
          mySwitch.sendTriState("X0X1F00XXX0X");
      }
      if (lineinput == "allon")
      {
          mySwitch.sendTriState("X0X1F00XXXXF");
      }
      if (lineinput == "alloff")
      {
          mySwitch.sendTriState("X0X1F00XXX0F");
      }
      lineinput = "";
    }
  }
}