gistfile1.c

// Activate WM+
    Serial.println("Intitializing MP");
    Wire.beginTransmission(0x52);
    Serial.println("1");
    Wire.send(0xf0);
    Serial.println("2");    
    Wire.send(0x55);
    Serial.println("3");    
    Wire.endTransmission();
    Serial.println("4");    
    delay(250);
    // Activate WM+ in NC passthrough mode    
    Serial.println("Setting mode: passthrough");
    Wire.begin();
    Wire.beginTransmission(0x53);  // Why 0x53 here and 0x52 later?
    Wire.send(0xfe);
    Wire.send(0x05);
    Wire.endTransmission(); // WM+ jumps to address 0x52 and is now active
    delay(250);
    // Set reading address
    Serial.print ("Setting reading address at 0xFA");
    Wire.beginTransmission(0x52); //0xA4
    Wire.send(0xfa);
    Wire.endTransmission();
    delay(250);
    // Read ID of WMP
    Serial.println("Reading MP ID");
    Wire.requestFrom(0x52, 6);
    int xID = 0;
    for(int i = 0; i < 6; i++) {
      data[i] = Wire.receive(); 
      xID += data[i];
    }