trev/arduino/src/sketch.ino

#include <RCSwitch.h>

uint8_t message[8];
int index = 0;
boolean com = false;

void setup()
{
  Serial.begin(9600);
}

void loop()
{
  while(Serial.available()) { 
    uint8_t x = Serial.read();
    if(index > 0 || (x >= 80 && x <= 95)) {
      message[index++] = x;
      if(index > 7){
        decodeMessage();
        index = 0;
      }
    }
  }
}

void decodeMessage() {
  
  int cmd = message[0];
  int pin = (message[1] - 97 < 0 || message[1] - 97 > 19)? -1 : message[1] - 97 < 0;
  
  if(com) {
    uint8_t val[6];
    memcpy(val, message + 2, 6); 

    switch (cmd) {
        //case 80:  break;
        case 81: setMode(val[0], pin); break;
        case 82: digitalW(val[0], pin) break;
        //case 83:  break;
        //case 84:  break;
        //case 85:  break;
        //case 86:  break;
        case 87: sendRCTristate(val, pin); break;
        //case 88:  break;
        //case 89:  break;
        default:                   break;
    }
  
  } else if(cmd] == 90) {

    com = true;
    setMode(0, pin);
    digitalWrite(pin, HIGH);
    Serial.println("Ready!");
  
  } else {
  
    Serial.println("Arduino not configured for communication!");
  
  }
}

void setMode(uint8_t val, int pin) {
  
  if(pin == -1) { if(debug) Serial.println("badpin"); return; }

  if (val == 0) {
    pinMode(pin, OUTPUT);
  } else {
    pinMode(pin, INPUT);
  }

}

void digitalW(uint8_t val, int pin) {

  if(pin == -1) { if(debug) Serial.println("badpin"); return; }
  pinMode(pin, OUTPUT);

  if(val == 0) {
    digitalWrite(pin, LOW);
  } else {
    digitalWrite(pin, HIGH);
  }

}

void sendRCTristate (uint8_t val[], int pin) {
  
  if(pin == -1) { if(debug) Serial.println("badpin"); return; }
  
  String triStateCode = "";
  RCSwitch rc = RCSwitch();
  mySwitch.enableTransmit(pin);

  for(int i = 0; i < 6; i++)
  {
    String triStatePart = String(val[i], HEX);
    triStatePart = (triStatePart.length() < 2) ? String("0" + triStatePart) : triStatePart;
    triStateCode.concat(triStatePart);
  }
  char triState[triStateCode.length() + 1];
  triStateCode.toUpperCase();
  triStateCode.toCharArray(triState, triStateCode.length() + 1);

  controlRCOutlets(triState);
  Serial.println("RC-Tristate send!");
}

void controlRCOutlets(const char* sCodeWord) {
  mySwitch.sendTriState(sCodeWord);
  delay(1000); 
}