Wireless outlet control for Arduino

WirelessOutletControl.ino

/**
 * Wireless Outlet Control
 * 
 * (c) 2016 Aaron Eiche, released under MIT License
 *     Use it, have fun with it.
 * 
 * Built for my existing wireless outlets, written in Arduino
 * Uses a common, inexpensive transmitter. 315Mhz or 433Mhz are typical.
 * You'll need to determine codes for your own outlets.
 * 
 * There's probably a more elegant method for doing this.
 * 
 * Special thanks to Adam Honse, and his instructable that inspired this and
 * gave me the approach for figuring it out. See this instructable: 
 * http://www.instructables.com/id/Cheap-Home-Automation-using-Wireless-Outlet-Module/
 */


// Set these according to the speed your outlets use. In microseconds.
// On, or 1 
#define HIGH_TIME_LONG 1800
#define LOW_TIME_LONG 600

// Off, or 0
#define HIGH_TIME_SHORT 600
#define LOW_TIME_SHORT 1800

#define transmit_pin 4  //Pin we're sending the signal out on.
#define led_pin 13       //Microcontroller LED Pin, for testing.

void setup() {
  // put your setup code here, to run once:
    pinMode(transmit_pin, OUTPUT);
    pinMode(led_pin, OUTPUT);
}

void loop() {
  // This is a simple loop, turns lights on, turns lights off.
  
  digitalWrite(led_pin,HIGH);
  ch3on();
  ch2on();
  delay(2000);

  digitalWrite(led_pin,LOW);
  ch3off();
  ch2off();
  delay(2000);
  
}


//The common beginning 4 bits:  0110
void opening(){
  bit_short();
  bit_long();
  bit_long();
  bit_short();
}

//The common ending 4 bits: 0000
void closing(){
  bit_short();
  bit_short();
  bit_short();
  bit_short();  
}

//We send the signal a few times to make sure it was received.

// Ch1 "on" Code: 1000 1000
void ch1on(){
  for(int i = 0; i < 3; i++){
    delay(10);
    opening();
    bit_long();
    bit_short();
    bit_short();
    bit_short();    
  
    bit_long();
    bit_short();
    bit_short();
    bit_short();
    closing();
  }
}

// Ch1 "off" Code: 1000 0100
void ch1off(){
  for(int i = 0; i < 3; i++){
    delay(10);
    opening();
    bit_long();
    bit_short();
    bit_short();
    bit_short();    
  
    bit_short();
    bit_long();
    bit_short();
    bit_short();
    closing();
  }
}

// Ch2 "on" Code: 1000 0010
void ch2on(){
  for(int i = 0; i < 5; i++){
    delay(10);
    opening();
    
    bit_long();
    bit_short();
    bit_short();
    bit_short();    

    bit_short();
    bit_short();
    bit_long();
    bit_short();
    
    closing();
  }
}

// Ch2 "off" Code: 1000 0001
void ch2off(){
  for(int i = 0; i < 5; i++){
    delay(10);
    opening();
    
    bit_long();
    bit_short();
    bit_short();
    bit_short();    
    
    bit_short();
    bit_short();
    bit_short();
    bit_long();  
    
    closing();
  }
}

// Ch3 "on" Code: 1001 0000
void ch3on(){
  for(int i = 0; i < 5; i++){
    delay(10);
    opening();
    
    bit_long();
    bit_short();
    bit_short();
    bit_long();
  
    
    bit_short();
    bit_short();
    bit_short();
    bit_short();
    
    closing();
  }
}

// Ch3 "on" Code: 1010 0000
void ch3off(){
  for(int i = 0; i < 5; i++){
    delay(10);
    opening();
    
    bit_long();
    bit_short();
    bit_long();
    bit_short();
  
    bit_short();
    bit_short();
    bit_short();
    bit_short();
    
    closing();
  }
}




//Toggle durations for "1"
void bit_long()
{
      digitalWrite(transmit_pin,HIGH);
      delayMicroseconds(HIGH_TIME_LONG);
      digitalWrite(transmit_pin,LOW);
      delayMicroseconds(LOW_TIME_LONG);
}

//Toggle durations for "0"
void bit_short()
{
      digitalWrite(transmit_pin,HIGH);
      delayMicroseconds(HIGH_TIME_SHORT);
      digitalWrite(transmit_pin,LOW);
      delayMicroseconds(LOW_TIME_SHORT);
}

"* There's probably a more elegant method for doing this." I bet there is, but... your codes just unlocked and sorted all the jumbled up research in my head regarding bit streaming RF. I'd spent days (...more like a week) trying to unravel RCSwitch and VirtualWire etc., none of which I could get to transmit correctly. Your code was so clearly written, without all the "elegant" fluff, that it is simply - BRILLIANT!