diff --git a/apps/arduino/arduino-process.c b/apps/arduino/arduino-process.c
index d5d83482a..ff26d6abd 100644
--- a/apps/arduino/arduino-process.c
+++ b/apps/arduino/arduino-process.c
@@ -56,17 +56,26 @@
 
 PROCESS(arduino_sketch, "Arduino Sketch Wrapper");
 
+#ifndef LOOP_INTERVAL
+#define LOOP_INTERVAL		(1 * CLOCK_SECOND)
+#endif
+
 PROCESS_THREAD(arduino_sketch, ev, data)
 {
+  static struct etimer loop_periodic_timer;
+  
   PROCESS_BEGIN();
 
-  arduino_pwm_timer_init ();
   adc_init ();
   setup ();
+  /* Define application-specific events here. */
+  etimer_set(&loop_periodic_timer, LOOP_INTERVAL);
   while (1) {
-    loop ();
-    /* Give other processes a chance to run */
-    PROCESS_PAUSE();
+	PROCESS_WAIT_EVENT();
+	if(etimer_expired(&loop_periodic_timer)) {
+        loop ();		
+        etimer_reset(&loop_periodic_timer);
+    }
   }
   PROCESS_END();
 }
diff --git a/examples/osd/arduino-plantobserving/resources/res-moisture.c b/examples/osd/arduino-plantobserving/resources/res-moisture.c
index b57f96514..9b1d0a553 100644
--- a/examples/osd/arduino-plantobserving/resources/res-moisture.c
+++ b/examples/osd/arduino-plantobserving/resources/res-moisture.c
@@ -53,13 +53,15 @@ RESOURCE(res_moisture,
          NULL);
 
 extern  uint8_t moisture_pin;
+extern  uint8_t moisture_vcc;
 extern  uint16_t moisture_voltage;
 
 static void
 res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
 {
-  
+  digitalWrite(moisture_vcc, HIGH);  
   moisture_voltage = analogRead(moisture_pin);
+  digitalWrite(moisture_vcc, LOW);
   
   unsigned int accept = -1;
   REST.get_header_accept(request, &accept);
diff --git a/examples/osd/arduino-plantobserving/sketch.pde b/examples/osd/arduino-plantobserving/sketch.pde
index be1c339a4..3db9a2ad1 100644
--- a/examples/osd/arduino-plantobserving/sketch.pde
+++ b/examples/osd/arduino-plantobserving/sketch.pde
@@ -15,6 +15,7 @@ extern "C" {
 
 extern resource_t res_moisture, res_battery;
 uint8_t moisture_pin = A5;
+uint8_t moisture_vcc = 19;
 uint16_t moisture_voltage = 0;
 
 #define LED_PIN 4
@@ -25,6 +26,9 @@ void setup (void)
     // switch off the led
     pinMode(LED_PIN, OUTPUT);
     digitalWrite(LED_PIN, HIGH);
+    // init moisture sensor
+    pinMode(moisture_vcc, OUTPUT);
+    digitalWrite(moisture_vcc, LOW);
     // init coap resourcen
     rest_init_engine ();
     rest_activate_resource (&res_moisture, "s/moisture");