Use pointers inernally instead of passing objects to save space.

libraries/MySensors/examples/DallasTemperatureSensor/DallasTemperatureSensor.ino

@@ -61,7 +61,7 @@ void loop()
     if (lastTemperature[i] != temperature && temperature != -127.00) {
  
       // Send in the new temperature
-      gw.send(out.setSensor(i).set(temperature,1));
+      gw.send(out.setSensor(i)->set(temperature,1));
       lastTemperature[i]=temperature;
     }
   }

libraries/MySensors/examples/RelayActuator/RelayActuator.ino

@@ -21,7 +21,7 @@ void setup()
   gw.sendSketchInfo("Relay", "1.0");
 
   // Fetch relay status
-  for (int sensor=0, pin=RELAY_1; sensor<=NUMBER_OF_RELAYS;sensor++, pin++) {
+  for (int sensor=1, pin=RELAY_1; sensor<=NUMBER_OF_RELAYS;sensor++, pin++) {
     // Register all sensors to gw (they will be created as child devices)
     gw.present(sensor, S_LIGHT);
     // Then set relay pins in output mode