@sundberg84 Thanks very much for this post. I was struggling to get the sensor appear in Home-Assistant. Your note on the fact that HA never returns V_VAR1 on first use was very useful and pointed me in the right direction.

My modifications looked like this:

} else if (sendTime && !pcReceived) {
		// No pulse count value received from controller. Try requesting it again.
		request(CHILD_ID, V_VAR1);
    retryCount++;
		lastSend = now;
	} else if (retryCount >= 5 && !pcReceived) {
      //For some controllers, if you dont have any V_VAR1 stored node will not get an answer.
      //Try 5 times, then set V_VAR1 to 0 and update controller
    pcReceived = true;
    retryCount = 0;
    send(pcMsg.set(pulseCount));  // Send pulse count 0 value to gw
    double kWh = ((double)pulseCount / ((double)PULSE_FACTOR));
    send(kWhMsg.set(kWh, 4));  // Send kWh value 0 to gw
    lastSend = now;
  }

The whole sketch is here:

/*
   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) 2013-2019 Sensnology AB
   Full contributor list: https://github.com/mysensors/MySensors/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
   Version 1.1 - Peter Andersson added millis watt calculation if time between pulses > 1h

   DESCRIPTION
   This sketch provides an example how to implement a LM393 PCB
   Use this sensor to measure kWh and Watt of your house meter
   You need to set the correct pulsefactor of your meter (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 value.
   http://www.mysensors.org/build/pulse_power
*/

// Enable debug prints
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_RF24
//#define MY_RADIO_NRF5_ESB
//#define MY_RADIO_RFM69
//#define MY_RADIO_RFM95

#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       // Number of blinks per kWh of your meter. Normally 1000.
#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 filters outliers.
#define CHILD_ID 1              // Id of the sensor child

uint32_t SEND_FREQUENCY =
    20000; // Minimum time between send (in milliseconds). We don't want to spam the gateway.
double ppwh = ((double)PULSE_FACTOR) / 1000; // Pulses per watt hour
bool pcReceived = false;
volatile uint32_t pulseCount = 0;
volatile uint32_t lastBlinkmicros = 0;
volatile uint32_t lastBlinkmillis = 0;
volatile uint32_t watt = 0;
uint32_t retryCount = 0;  //If value not being returned from controller, increment this counter
uint32_t oldPulseCount = 0;
uint32_t oldWatt = 0;
double oldkWh;
uint32_t lastSend;
MyMessage wattMsg(CHILD_ID, V_WATT);
MyMessage kWhMsg(CHILD_ID, V_KWH);
MyMessage pcMsg(CHILD_ID, V_VAR1);

#if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32)
#define IRQ_HANDLER_ATTR ICACHE_RAM_ATTR
#else
#define IRQ_HANDLER_ATTR
#endif

void IRQ_HANDLER_ATTR onPulse()
{
	if (!SLEEP_MODE) {
		uint32_t newBlinkmicros = micros();
		uint32_t newBlinkmillis = millis();
		uint32_t intervalmicros = newBlinkmicros - lastBlinkmicros;
		uint32_t intervalmillis = newBlinkmillis - lastBlinkmillis;
		if (intervalmicros < 10000L && intervalmillis < 10L) { // Sometimes we get interrupt on RISING
			return;
		}
		if (intervalmillis < 360000) { // Less than an hour since last pulse, use microseconds
			watt = (3600000000.0 / intervalmicros) / ppwh;
		} else {
			watt = (3600000.0 / intervalmillis) /
			       ppwh; // more thAn an hour since last pulse, use milliseconds as micros will overflow after 70min
		}
		lastBlinkmicros = newBlinkmicros;
		lastBlinkmillis = newBlinkmillis;
	}
	pulseCount++;
}

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(F("Energy Meter"), F("1.1"));

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

void loop()
{
	uint32_t 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 don't get unreasonable large watt value, which
			// could happen when long wraps or false interrupt triggered
			if (watt < ((uint32_t)MAX_WATT)) {
				send(wattMsg.set(watt));  // Send watt value to gw
			}
			Serial.print("Watt:");
			Serial.println(watt);
			oldWatt = watt;
		}

		// Pulse count value 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 pulse count value received from controller. Try requesting it again.
		request(CHILD_ID, V_VAR1);
    retryCount++;
		lastSend = now;
	} else if (retryCount >= 5 && !pcReceived) {
      //For some controllers, if you dont have any V_VAR1 stored node will not get an answer.
      //Try 5 times, then set V_VAR1 to 0 and update controller
    pcReceived = true;
    retryCount = 0;
    send(pcMsg.set(pulseCount));  // Send pulse count 0 value to gw
    double kWh = ((double)pulseCount / ((double)PULSE_FACTOR));
    send(kWhMsg.set(kWh, 4));  // Send kWh value 0 to gw
    lastSend = now;
  }


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

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

@tbowmo Thats great, thank you. The URL seems to have changed.

I've been building one of these pulse meters up, it seems to be working on the bench very nice. Just got to build a case and get a power supply of the Arduino. But I have designed a case to hold the LM393 sensor onto the meter. I removed the light sensor and re-soldered it flush to the board making it easier to mount on the meter. Its a simple box but works quite well.

The files are on thingiverse here

Hope this is useful.

@mfalkvidd Thanks for the response. I was not trying to compile the SecurityPersonalizer sketch, I was trying to compile the Sensebender Micro example sketch, this apparently also needs the sha204xxx files. I copied these files over from the SecurityPersonalizer sketch and it works now. thank you.

I think sha204xxx files should also be put in the Sensebender Micro folder. Or some directions on the Sensebender Micro page on where to get these files.

Got this sensor up and running now. Comparing it to my old clamp meter the kWh reading was reading 2-3 times higher, the Watts was about right. I added a 0.1uF capacity across the ground and data pins of the sensor and it is working well now.
The graph below shows the comparison of my two sensors. the old clamp meter is Energy previous hour, the new pulse sensor is Temp energy previous hour
You can see they are not aligned, until about 20:00 when I added the capacitor and they drop in line.

Got this sensor up and running now. Comparing it to my old clamp meter the kWh reading was reading 2-3 times higher, the Watts was about right. I added a 0.1uF capacity across the ground and data pins of the sensor and it is working well now.
The graph below shows the comparison of my two sensors. the old clamp meter is Energy previous hour, the new pulse sensor is Temp energy previous hour
You can see they are not aligned, until about 20:00 when I added the capacitor and they drop in line.

@sundberg84 Thanks very much for this post. I was struggling to get the sensor appear in Home-Assistant. Your note on the fact that HA never returns V_VAR1 on first use was very useful and pointed me in the right direction.

My modifications looked like this:

} else if (sendTime && !pcReceived) {
		// No pulse count value received from controller. Try requesting it again.
		request(CHILD_ID, V_VAR1);
    retryCount++;
		lastSend = now;
	} else if (retryCount >= 5 && !pcReceived) {
      //For some controllers, if you dont have any V_VAR1 stored node will not get an answer.
      //Try 5 times, then set V_VAR1 to 0 and update controller
    pcReceived = true;
    retryCount = 0;
    send(pcMsg.set(pulseCount));  // Send pulse count 0 value to gw
    double kWh = ((double)pulseCount / ((double)PULSE_FACTOR));
    send(kWhMsg.set(kWh, 4));  // Send kWh value 0 to gw
    lastSend = now;
  }

The whole sketch is here:

/*
   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) 2013-2019 Sensnology AB
   Full contributor list: https://github.com/mysensors/MySensors/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
   Version 1.1 - Peter Andersson added millis watt calculation if time between pulses > 1h

   DESCRIPTION
   This sketch provides an example how to implement a LM393 PCB
   Use this sensor to measure kWh and Watt of your house meter
   You need to set the correct pulsefactor of your meter (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 value.
   http://www.mysensors.org/build/pulse_power
*/

// Enable debug prints
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_RF24
//#define MY_RADIO_NRF5_ESB
//#define MY_RADIO_RFM69
//#define MY_RADIO_RFM95

#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       // Number of blinks per kWh of your meter. Normally 1000.
#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 filters outliers.
#define CHILD_ID 1              // Id of the sensor child

uint32_t SEND_FREQUENCY =
    20000; // Minimum time between send (in milliseconds). We don't want to spam the gateway.
double ppwh = ((double)PULSE_FACTOR) / 1000; // Pulses per watt hour
bool pcReceived = false;
volatile uint32_t pulseCount = 0;
volatile uint32_t lastBlinkmicros = 0;
volatile uint32_t lastBlinkmillis = 0;
volatile uint32_t watt = 0;
uint32_t retryCount = 0;  //If value not being returned from controller, increment this counter
uint32_t oldPulseCount = 0;
uint32_t oldWatt = 0;
double oldkWh;
uint32_t lastSend;
MyMessage wattMsg(CHILD_ID, V_WATT);
MyMessage kWhMsg(CHILD_ID, V_KWH);
MyMessage pcMsg(CHILD_ID, V_VAR1);

#if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32)
#define IRQ_HANDLER_ATTR ICACHE_RAM_ATTR
#else
#define IRQ_HANDLER_ATTR
#endif

void IRQ_HANDLER_ATTR onPulse()
{
	if (!SLEEP_MODE) {
		uint32_t newBlinkmicros = micros();
		uint32_t newBlinkmillis = millis();
		uint32_t intervalmicros = newBlinkmicros - lastBlinkmicros;
		uint32_t intervalmillis = newBlinkmillis - lastBlinkmillis;
		if (intervalmicros < 10000L && intervalmillis < 10L) { // Sometimes we get interrupt on RISING
			return;
		}
		if (intervalmillis < 360000) { // Less than an hour since last pulse, use microseconds
			watt = (3600000000.0 / intervalmicros) / ppwh;
		} else {
			watt = (3600000.0 / intervalmillis) /
			       ppwh; // more thAn an hour since last pulse, use milliseconds as micros will overflow after 70min
		}
		lastBlinkmicros = newBlinkmicros;
		lastBlinkmillis = newBlinkmillis;
	}
	pulseCount++;
}

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(F("Energy Meter"), F("1.1"));

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

void loop()
{
	uint32_t 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 don't get unreasonable large watt value, which
			// could happen when long wraps or false interrupt triggered
			if (watt < ((uint32_t)MAX_WATT)) {
				send(wattMsg.set(watt));  // Send watt value to gw
			}
			Serial.print("Watt:");
			Serial.println(watt);
			oldWatt = watt;
		}

		// Pulse count value 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 pulse count value received from controller. Try requesting it again.
		request(CHILD_ID, V_VAR1);
    retryCount++;
		lastSend = now;
	} else if (retryCount >= 5 && !pcReceived) {
      //For some controllers, if you dont have any V_VAR1 stored node will not get an answer.
      //Try 5 times, then set V_VAR1 to 0 and update controller
    pcReceived = true;
    retryCount = 0;
    send(pcMsg.set(pulseCount));  // Send pulse count 0 value to gw
    double kWh = ((double)pulseCount / ((double)PULSE_FACTOR));
    send(kWhMsg.set(kWh, 4));  // Send kWh value 0 to gw
    lastSend = now;
  }


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

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

I've been building one of these pulse meters up, it seems to be working on the bench very nice. Just got to build a case and get a power supply of the Arduino. But I have designed a case to hold the LM393 sensor onto the meter. I removed the light sensor and re-soldered it flush to the board making it easier to mount on the meter. Its a simple box but works quite well.

The files are on thingiverse here

Hope this is useful.

@mfalkvidd Yes, that’s the one.

@mfalkvidd Thanks for the response. I was not trying to compile the SecurityPersonalizer sketch, I was trying to compile the Sensebender Micro example sketch, this apparently also needs the sha204xxx files. I copied these files over from the SecurityPersonalizer sketch and it works now. thank you.

I think sha204xxx files should also be put in the Sensebender Micro folder. Or some directions on the Sensebender Micro page on where to get these files.

Hi there,
Just received a couple of Sensebender Micro's, really excited to get them up and running. I'm trying to compile the sample code, but I can't find a library for the sha204, I'm getting the following error:

sha204_lib_return_codes.h: No such file or directory

Any idea how I can solve this please.
thank you.

@tbowmo Thats great, thank you. The URL seems to have changed.

Hello, really interesting in getting a few of these Sensebender Micros, but it does not seem to be available any more. Will they be coming back into stock?

@Matt-McAllister Hi there, I know this is an old topic, but I've been experiencing the same issue. the way I got around it is by putting a:

delay(500);

between the two presentation statements.

Hello all.

I'm just getting started with MySensors.org. I'm trying to flash my ProMini 3v3 with the Serial Gateway sketch with Arduino 1.6.4. on a Mac running OSX10.11.1

I have copied the MySensors library folder into user/documents/arduino/library

I have opened the SerialGateway sketch from File/Sketchbook/libraries/MySensors/SerialGateway

Upon verifying the sketch I get the following error in the Arduino IDE

SerialGateway.ino:52:26: fatal error: PinChangeInt.h: No such file or directory
compilation terminated.
Error compiling.

I cannot find the PinChangeInt.h file in the library. Can someone give me a clue on how I move forward. thank you.
Keith Ellis