In the end it displays the watt value and then just hangs. I haven't modified the example at all. I am @ work now but will be able to check again later

/**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * REVISION HISTORY
 * Version 1.0 - Henrik EKblad
 * 
 * DESCRIPTION
 * This sketch provides an example how to implement a distance sensor using HC-SR04 
 * Use this sensor to measure KWH and Watt of your house meeter
 * You need to set the correct pulsefactor of your meeter (blinks per KWH).
 * The sensor starts by fetching current KWH value from gateway.
 * Reports both KWH and Watt back to gateway.
 *
 * Unfortunately millis() won't increment when the Arduino is in 
 * sleepmode. So we cannot make this sensor sleep if we also want 
 * to calculate/report watt-number.
 * http://www.mysensors.org/build/pulse_power
 */

// Enable debug prints
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RF24_CHANNEL 74
//#define MY_RADIO_RFM69

#include <MySensors.h>  

#define DIGITAL_INPUT_SENSOR 3  // The digital input you attached your light sensor.  (Only 2 and 3 generates interrupt!)
#define PULSE_FACTOR 1000       // Nummber of blinks per KWH of your meeter
#define SLEEP_MODE false        // Watt-value can only be reported when sleep mode is false.
#define MAX_WATT 10000          // Max watt value to report. This filetrs outliers.
#define CHILD_ID 1              // Id of the sensor child

unsigned long SEND_FREQUENCY = 5000; // Minimum time between send (in milliseconds). We don't wnat to spam the gateway.
double ppwh = ((double)PULSE_FACTOR)/1000; // Pulses per watt hour
bool pcReceived = false;
volatile unsigned long pulseCount = 0;   
volatile unsigned long lastBlink = 0;
volatile unsigned long watt = 0;
unsigned long oldPulseCount = 0;   
unsigned long oldWatt = 0;
double oldKwh;
unsigned long lastSend;
MyMessage wattMsg(CHILD_ID,V_WATT);
MyMessage kwhMsg(CHILD_ID,V_KWH);
MyMessage pcMsg(CHILD_ID,V_VAR1);


void setup()  
{  
  // Fetch last known pulse count value from gw
  request(CHILD_ID, V_VAR1);

  // Use the internal pullup to be able to hook up this sketch directly to an energy meter with S0 output
  // If no pullup is used, the reported usage will be too high because of the floating pin
  pinMode(DIGITAL_INPUT_SENSOR,INPUT_PULLUP);

  attachInterrupt(digitalPinToInterrupt(DIGITAL_INPUT_SENSOR), onPulse, RISING);
  lastSend=millis();
  Serial.println("7");
}

void presentation() {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("Energy Meter", "1.0");

  // Register this device as power sensor
  present(CHILD_ID, S_POWER);
  Serial.println("7");
}
//Serial.println("6");
void loop()     
{ 
  unsigned long now = millis();
  // Only send values at a maximum frequency or woken up from sleep
  bool sendTime = now - lastSend > SEND_FREQUENCY;
  if (pcReceived && (SLEEP_MODE || sendTime)) {
    // New watt value has been calculated  
    if (!SLEEP_MODE && watt != oldWatt) {
      // Check that we dont get unresonable large watt value. 
      // could hapen when long wraps or false interrupt triggered
      if (watt<((unsigned long)MAX_WATT)) {
        send(wattMsg.set(watt));  // Send watt value to gw 
      }  
      Serial.print("Watt:");
      Serial.println(watt);
      oldWatt = watt;
    }
Serial.println("5");
    // Pulse cout has changed
    if (pulseCount != oldPulseCount) {
      send(pcMsg.set(pulseCount));  // Send pulse count value to gw 
      double kwh = ((double)pulseCount/((double)PULSE_FACTOR));     
      oldPulseCount = pulseCount;
      if (kwh != oldKwh) {
        send(kwhMsg.set(kwh, 4));  // Send kwh value to gw 
        oldKwh = kwh;
      }
      Serial.println("4");
    }    
    lastSend = now;
  } else if (sendTime && !pcReceived) {
    // No count received. Try requesting it again
    request(CHILD_ID, V_VAR1);
    lastSend=now;
  }
Serial.println("3");
  if (SLEEP_MODE) {
    sleep(SEND_FREQUENCY);
  }
  Serial.println("2");
}

void receive(const MyMessage &message) {
if (message.type==V_VAR1) {
Serial.println("rece");
pulseCount = oldPulseCount = message.getLong();
Serial.print("Received last pulse count from gw:");
Serial.println(pulseCount);
pcReceived = true;
}
Serial.println("not_rece");
}

void onPulse()     
{ 
  if (!SLEEP_MODE) {
    unsigned long newBlink = micros();  
    unsigned long interval = newBlink-lastBlink;
    if (interval<10000L) { // Sometimes we get interrupt on RISING
      return;
    }
    watt = (3600000000.0 /interval) / ppwh;
    lastBlink = newBlink;
    
  } 
 
  pulseCount++;
  Serial.println("1");
  
}

this

@flopp
i have done that and calibrated the lm393 , i have a blinking light that triggers the sensor. thats how i am testing...but after initializing sends the value first time and thats it
sorry to reply so late but have to wait 120seconds between posts lol

@flopp
lm393

@flopp

i have connected the digital out from the sensor

this is the code now

/**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * REVISION HISTORY
 * Version 1.0 - Henrik EKblad
 * 
 * DESCRIPTION
 * This sketch provides an example how to implement a distance sensor using HC-SR04 
 * Use this sensor to measure KWH and Watt of your house meeter
 * You need to set the correct pulsefactor of your meeter (blinks per KWH).
 * The sensor starts by fetching current KWH value from gateway.
 * Reports both KWH and Watt back to gateway.
 *
 * Unfortunately millis() won't increment when the Arduino is in 
 * sleepmode. So we cannot make this sensor sleep if we also want 
 * to calculate/report watt-number.
 * http://www.mysensors.org/build/pulse_power
 */

// Enable debug prints
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_NRF24

//#define MY_RADIO_RFM69

#include <MySensors.h>  

#define DIGITAL_INPUT_SENSOR 3  // The digital input you attached your light sensor.  (Only 2 and 3 generates interrupt!)
#define PULSE_FACTOR 1000       // Nummber of blinks per KWH of your meeter
#define SLEEP_MODE false        // Watt-value can only be reported when sleep mode is false.
#define MAX_WATT 10000          // Max watt value to report. This filetrs outliers.
#define CHILD_ID 1              // Id of the sensor child

unsigned long SEND_FREQUENCY = 5000; // Minimum time between send (in milliseconds). We don't wnat to spam the gateway.
double ppwh = ((double)PULSE_FACTOR)/1000; // Pulses per watt hour
bool pcReceived = false;
volatile unsigned long pulseCount = 0;   
volatile unsigned long lastBlink = 0;
volatile unsigned long watt = 0;
unsigned long oldPulseCount = 0;   
unsigned long oldWatt = 0;
double oldKwh;
unsigned long lastSend;
MyMessage wattMsg(CHILD_ID,V_WATT);
MyMessage kwhMsg(CHILD_ID,V_KWH);
MyMessage pcMsg(CHILD_ID,V_VAR1);


void setup()  
{  
  // Fetch last known pulse count value from gw
  request(CHILD_ID, V_VAR1);

  // Use the internal pullup to be able to hook up this sketch directly to an energy meter with S0 output
  // If no pullup is used, the reported usage will be too high because of the floating pin
  pinMode(DIGITAL_INPUT_SENSOR,INPUT_PULLUP);

  attachInterrupt(digitalPinToInterrupt(DIGITAL_INPUT_SENSOR), onPulse, RISING);
  lastSend=millis();
}

void presentation() {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("Energy Meter", "1.0");

  // Register this device as power sensor
  present(CHILD_ID, S_POWER);
}

void loop()     
{ 
  unsigned long now = millis();
  // Only send values at a maximum frequency or woken up from sleep
  bool sendTime = now - lastSend > SEND_FREQUENCY;
  if (pcReceived && (SLEEP_MODE || sendTime)) {
    // New watt value has been calculated  
    if (!SLEEP_MODE && watt != oldWatt) {
      // Check that we dont get unresonable large watt value. 
      // could hapen when long wraps or false interrupt triggered
      if (watt<((unsigned long)MAX_WATT)) {
        send(wattMsg.set(watt));  // Send watt value to gw 
      }  
      Serial.print("Watt:");
      Serial.println(watt);
      oldWatt = watt;
    }

    // Pulse cout has changed
    if (pulseCount != oldPulseCount) {
      send(pcMsg.set(pulseCount));  // Send pulse count value to gw 
      double kwh = ((double)pulseCount/((double)PULSE_FACTOR));     
      oldPulseCount = pulseCount;
      if (kwh != oldKwh) {
        send(kwhMsg.set(kwh, 4));  // Send kwh value to gw 
        oldKwh = kwh;
      }
    }    
    lastSend = now;
  } else if (sendTime && !pcReceived) {
    // No count received. Try requesting it again
    request(CHILD_ID, V_VAR1);
    lastSend=now;
  }

  if (SLEEP_MODE) {
    sleep(SEND_FREQUENCY);
  }
}

void receive(const MyMessage &message) {
  if (message.type==V_VAR1) {  
    pulseCount = oldPulseCount = message.getLong();
    Serial.print("Received last pulse count from gw:");
    Serial.println(pulseCount);
    pcReceived = true;
  }
}

void onPulse()     
{ 
  if (!SLEEP_MODE) {
    unsigned long newBlink = micros();  
    unsigned long interval = newBlink-lastBlink;
    if (interval<10000L) { // Sometimes we get interrupt on RISING
      return;
    }
    watt = (3600000000.0 /interval) / ppwh;
    lastBlink = newBlink;
  } 
  pulseCount++;
}

sorry for the next noob question but what do you mean by trigginh the pin 3? simulating the sensor? if yes i done that.. i have a led blinking

changed it to false.
put it true before to try to force the sensor sending independent of the count.. if i am correct
still the same outcome... will try tomorrow diffrent hardware
anyway, thanks a lot for the help

ooops sorry about that... just found the function lol
the sensor inits itself once and then doesn't do anything/ i don't know through what miracle i got the pulse count.
will try another arduino... i do not think it is a radio problem..
thanks for your help

Done that... reset everything..still the same

here is my code

#define DIGITAL_INPUT_SENSOR 3 // The digital input you attached your light sensor. (Only 2 and 3 generates interrupt!)
#define PULSE_FACTOR 1000 // Nummber of blinks per KWH of your meeter
#define SLEEP_MODE false // Watt-value can only be reported when sleep mode is false.
#define MAX_WATT 10000 // Max watt value to report. This filetrs outliers.
#define CHILD_ID 1 // Id of the sensor child

unsigned long SEND_FREQUENCY = 5000; // Minimum time between send (in milliseconds). We don't wnat to spam the gateway.
double ppwh = ((double)PULSE_FACTOR)/1000; // Pulses per watt hour
bool pcReceived = true;
volatile unsigned long pulseCount = 0;
volatile unsigned long lastBlink = 0;
volatile unsigned long watt = 0;
unsigned long oldPulseCount = 0;
unsigned long oldWatt = 0;
double oldKwh;
unsigned long lastSend;
MyMessage wattMsg(CHILD_ID,V_WATT);
MyMessage kwhMsg(CHILD_ID,V_KWH);
MyMessage pcMsg(CHILD_ID,V_VAR1);

void setup()
{
// Fetch last known pulse count value from gw
request(CHILD_ID, V_VAR1);

// Use the internal pullup to be able to hook up this sketch directly to an energy meter with S0 output
// If no pullup is used, the reported usage will be too high because of the floating pin
pinMode(DIGITAL_INPUT_SENSOR,INPUT_PULLUP);

attachInterrupt(digitalPinToInterrupt(DIGITAL_INPUT_SENSOR), onPulse, RISING);
lastSend=millis();
}

void presentation() {
// Send the sketch version information to the gateway and Controller
sendSketchInfo("Energy Meter", "1.0");

// Register this device as power sensor
present(CHILD_ID, S_POWER);
}

void loop()
{
unsigned long now = millis();
// Only send values at a maximum frequency or woken up from sleep
bool sendTime = now - lastSend > SEND_FREQUENCY;
if (pcReceived && (SLEEP_MODE || sendTime)) {
// New watt value has been calculated
if (!SLEEP_MODE && watt != oldWatt) {
// Check that we dont get unresonable large watt value.
// could hapen when long wraps or false interrupt triggered
if (watt<((unsigned long)MAX_WATT)) {
send(wattMsg.set(watt)); // Send watt value to gw
}
Serial.print("Watt:");
Serial.println(watt);
oldWatt = watt;
}

// Pulse cout has changed
if (pulseCount != oldPulseCount) {
  send(pcMsg.set(pulseCount));  // Send pulse count value to gw 
  double kwh = ((double)pulseCount/((double)PULSE_FACTOR));     
  oldPulseCount = pulseCount;
  if (kwh != oldKwh) {
    send(kwhMsg.set(kwh, 4));  // Send kwh value to gw 
    oldKwh = kwh;
  }
}    
lastSend = now;

} else if (sendTime && !pcReceived) {
// No count received. Try requesting it again
request(CHILD_ID, V_VAR1);
lastSend=now;
}

if (SLEEP_MODE) {
sleep(SEND_FREQUENCY);
}
}

void receive(const MyMessage &message) {
if (message.type==V_VAR1) {
pulseCount = oldPulseCount = message.getLong();
Serial.print("Received last pulse count from gw:");
Serial.println(pulseCount);
pcReceived = true;
}
}

void onPulse()
{
if (!SLEEP_MODE) {
unsigned long newBlink = micros();
unsigned long interval = newBlink-lastBlink;
if (interval<10000L) { // Sometimes we get interrupt on RISING
return;
}
watt = (3600000000.0 /interval) / ppwh;
lastBlink = newBlink;
}
pulseCount++;
}

Ah the gateway works fine with other sensors
The code for the pulse power meter is the one in the example