@Yveaux I am so terribly embarrassed! In order to rule out something wrong with the WS5100 I rebuilt the GW using an old Arduino UNO with an Ethernet shield. Still same problem. Then to really make sure I pasted/copied username and password from the cloudmqtt into the sketch. Immediate success! It turned out that I had misread an uppercase I (indigo) for a lower case l (lima). Still the suggestions from the community were good since I could iron out one possible cause after another. Thanks for the support!

Hi!
I had exactly the same problem until I realised I had compiled for the 8 MHz version of the Arduino Pro Mini instead of the 16 MHz version.
Also, recently building an humidity sensor I realised there are no pull-up resistors on the SDA SDL lines, but that should be built-in if you use a break-out module.

@pierrot10
Since I am using almost the same tipping bucket rain gauge, let me try to explain how it works:

The top of my funnel measures 109 x 49 mm = 5341 mm2 (square millimeters). For now, let us not worry about the rounded corners of the funnel.
If it rains 1 mm the funnel will collect 5341 mm3 (cubic millimeters) which is 5,341 cubic centimeters equal to 5,34 milliliters. This is difficult to use for calibration so let's try with 10 mm of rain which then equals 53,4 milliliters or 0,53 deciliters of water.

So, you pour 53,4 milliliters of water into the funnel, not spilling any and you count the number of bucket tips. In my example, when I do this, the bucket tips 30 times. So if the bucket tips 30 times during a time period, it has rained 10 mm during that time. Or, the other way around: One tip of the bucket = 10/30 = 0,33 mm of rain.

Do not worry about the size of the bucket inside. What matters is how many times the bucket tips for a given amount of water. It is the area of the funnel which is important.
When it rains 1 mm an area of one square meter will receive 1 liter of water but the little funnel will only receive 5,34 milliliters as explained above.

Now, if you really want to be accurate, you should take away the area of the rounded corners. But that will be less than 0,5% and there are other sources of inaccuracy.

I think the reason is that you have not set a node ID. At least this is not visible in the sketch.
OpenHab does not hand out node IDs. I have good experience.
You should try setting
#define MY_NODE_ID 1
In the beginning of your sketch where you define Child ID.

Hi!
Sorry to say, but the Arduino Nano may not be the best choice for battery operation and maybe the Motion Detector also is not the most power economic application. I guess, to start with you have not done any modification to the Nano like removing the power LED? There goes a few milliamps the whole time.

The PIR need rather high voltage to be stable and not generate random detects. I run mine on 8V. But the Nano needs only 5V so you burn off a bit of power in the voltage regulator chip, even if the sleep current of the Nano is very low. Of course, the more detections there are, the more power is used during the day.

The Arduino ProMini is a better choice for battery operation. Please see Battery Powering in the left-hand column on the MySensors site. There are a few tricks there to really bring down power consumption. Then again the PIR needs more than 5V so you will have to use a power booster if you use the ProMini 8 MHz version that runs on 3.3 V.

I think sleeping for 600000 mS will only marginally improve battery economy. I went through the same ordeal as you and I run my Motion Detector on a 9 V wall-wart.

For sensors that really work well on battery I would suggest Light, Temperature and Humidity. I have a few of these built around ProMini 8 MHz and they typically run for 9 months or more on 2 x AA reporting every 2 minutes, but if you look at the link above, people achieve much better results. But I'm happy with 9 months.

Best of luck and keep experimenting!

Oops! I may have misled you.
The #define MY_NODE_ID 1 has to go into the sketch before you call #include <MySensors.h>

as pointed out in the description of the Library API definitions:
"Remember to set configuration defines before including the MySensors.h."
In my sketches I always do all the #define (s) first like below:

// Enable debug prints to serial monitor
#define MY_DEBUG
#define MY_NODE_ID 23
#define BATTERY_SENSE_PIN A0  // Input pin for battery sense
#define VMIN 1.0  // (Min input voltage to regulator according to datasheet or guessing. (?) )
#define VMAX 3.22 // (Known or desired voltage of full batteries. If not, set to Vlim.)
#define CHILD_ID_HUM 0
#define CHILD_ID_TEMP 1
 

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

#include <SPI.h>
#include <AM2320.h>
#include <Wire.h>
#include <MySensors.h>
// Rest of code goes here...  

@Patrik Söderström I think this is normal. Please check the Serial Protocol spec. under Download & API above to understand what the different elements describe. You should get this message once every two minutes if SLEEP_TIME = 120000 and you do not trigger the PIR. If triggered you should get 0;1;1;0;16;1 followed by 0;1;1;0;16;0 when the PIR resets. I built the Motion detector using the MiniPIR module above but I found that it needs at least +5V to operate reliably. Below 5V I think I remember that I got a lot of false trigs.

I have built an intrusion detector that also measures barometer pressure and indoor and outdoor temperatures.

The pressure and indoor temperature is measured by a BMP280 and a number of DS18B20 sensors can be connected to measure the temperature in remote locations.

When movement is detected two red LEDs flash during 20 sec.

Everything is built into a frightening wooden mask, bought in Indonesia. The LEDs poke out through the nostrils.

Here is the sketch:

/**
 * File name: MotionSensor_LED_2_temp_baro_280
 * 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
 * Version 2.1 - Gunnar Blockmar includes PMB280 temp/baro sensor and DS18B20 temp sensor
 * 
 * DESCRIPTION
 * Motion Sensor example using HC-SR501 
 * http://www.mysensors.org/build/motion
 *
 * Now with 1 fading LEDs when sensor is triggered
 * Measuring temp and pressure with BMP 280. Local pressure
 * Measuring remote temp via DS18B20
 */

#include <Adafruit_BMP280.h>
#include <Adafruit_Sensor.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <SPI.h>

unsigned long SLEEP_TIME = 60000; // Sleep time between reports (in milliseconds)

#define MY_DEBUG
#define DIGITAL_INPUT_SENSOR 3   // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
#define INTERRUPT DIGITAL_INPUT_SENSOR-2 // Usually the interrupt = pin -2 (on uno/nano anyway)
#define CHILD_ID_MOT 0   // Id of the motion sensor child
#define CHILD_ID_ITEMP 1  // Id of indoor temperature sensor
#define CHILD_ID_BARO 2  // Id of pressure sensor
#define CHILD_ID_OTEMP 3  // Id of outdoor temperature sensor 
#define RED_LED 5    // Pin for LED
#define RED_LED2 6  // Pin for LED2
#define DELAY 40     // Wait for brightness change
int fadeAmount = 5;   // brightness change per step
#define ONE_WIRE_BUS 2 // Pin where dallas sensor is connected 
#define MAX_ATTACHED_DS18B20 16
OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
DallasTemperature sensors(&oneWire); // Pass the oneWire reference to Dallas Temperature. 
int numSensors=0;
bool receivedConfig = false;


const char *weather[] = { "Stabilt", "Bättre", "Sämre", "Ostadigt", "Åska!", "Okänt" };
enum FORECAST
{
  STABLE = 0,     // "Stable Weather Pattern"
  SUNNY = 1,      // "Slowly rising Good Weather", "Clear/Sunny "
  CLOUDY = 2,     // "Slowly falling L-Pressure ", "Cloudy/Rain "
  UNSTABLE = 3,   // "Quickly rising H-Press",     "Not Stable"
  THUNDERSTORM = 4, // "Quickly falling L-Press",    "Thunderstorm"
  UNKNOWN = 5     // "Unknown (More Time needed)
};

Adafruit_BMP280 bmp;      // Digital Pressure Sensor

float lastPressure = -1;
float lastTemp = -1;
int lastForecast = -1;

const int LAST_SAMPLES_COUNT = 5;
float lastPressureSamples[LAST_SAMPLES_COUNT];

// this CONVERSION_FACTOR is used to convert from Pa to kPa in forecast algorithm
// get kPa/h by dividing hPa by 10 
#define CONVERSION_FACTOR (1.0/10.0)

int minuteCount = 0;
bool firstRound = true;
// average value is used in forecast algorithm.
float pressureAvg;
// average after 2 hours is used as reference value for the next iteration.
float pressureAvg2;
float dP_dt;



// Enable debug prints to serial monitor
// #define MY_DEBUG 

// Enables and select radio type (if attached)
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69

#define MY_NODE_ID 41

#include <MySensors.h>

// Initialize motion message
MyMessage msgm(CHILD_ID_MOT, V_TRIPPED);
// Initialize temp baro and forecast messages
MyMessage msgit(CHILD_ID_ITEMP, V_TEMP);
MyMessage msgp(CHILD_ID_BARO, V_PRESSURE);
MyMessage forecastMsg(CHILD_ID_BARO, V_FORECAST);
MyMessage msgot(0, V_TEMP);

bool metric = true;
void before()
{
  // Startup up the OneWire library
  sensors.begin();
}


void setup()  
{  
  pinMode(DIGITAL_INPUT_SENSOR, INPUT);      // sets the motion sensor digital pin as input
  pinMode(RED_LED, OUTPUT);   // sets the pin for the LEDs as output
  pinMode(RED_LED2, OUTPUT);
  analogWrite(RED_LED, 0);    // make sure LEDs are OFF
  analogWrite(RED_LED2, 0);
  bmp.begin();
  if (!bmp.begin()) 
  {
    Serial.println("Could not find a valid BMP280 sensor, check wiring!");
    while (1) {}
  }
  // requestTemperatures() will not block current thread
  sensors.setWaitForConversion(false);
}

void presentation()
{
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("M. Sens_LED_2t/b/f 280", "2.2");

  // Fetch the number of attached temperature sensors  
  numSensors = sensors.getDeviceCount();
  
  // Register all sensors to gw (they will be created as child devices)
  present(CHILD_ID_MOT, S_MOTION);
  present(CHILD_ID_ITEMP, S_TEMP);
  present(CHILD_ID_BARO, S_BARO);
  for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {   
     present(i+CHILD_ID_OTEMP, S_TEMP);
  }   
}

void loop()     
{     
  
  // Read digital motion value
  boolean tripped = digitalRead(DIGITAL_INPUT_SENSOR) == HIGH; 
        
    
  Serial.println(tripped);
  send(msgm.set(tripped?"1":"0"));  // Send tripped value to gw
   

  if (tripped) {
   int brightness = 0;   // brightness of LED
   int count = 0;  // number of half cycles to fade LED
   while (count < 12) {    // run 6 full fade cycles
      analogWrite(RED_LED, brightness);
      analogWrite(RED_LED2, brightness);
      brightness = brightness + fadeAmount;
      if (brightness == 0 || brightness == 255) {
        fadeAmount = -fadeAmount;  // change direction of fade
        count ++;
      }
      wait (DELAY);  //wait to see brightness change
    }
    analogWrite(RED_LED, 0);  // turn off LEDs
    analogWrite(RED_LED2, 0);
  }

  int long pressure = bmp.readPressure() / 100;
  float temperature = bmp.readTemperature();
  int forecast = sample(pressure);

  send(msgit.set(temperature, 1));
  send(msgp.set(pressure, 0));
  send(forecastMsg.set(weather[forecast]));

  // Fetch temperatures from Dallas sensors
  sensors.requestTemperatures();

  sleep (750);

  // Read temperatures and send them to controller 
  for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {
  // Fetch and round temperature to one decimal
  float otemperature = static_cast<float>(static_cast<int>((sensors.getTempCByIndex(i)) * 10.)) / 10.;

  // Only send data if no error
    
  if (otemperature != -127.00 && otemperature != 85.00) {
  // Send in the new temperature
      send(msgot.setSensor(i+CHILD_ID_OTEMP).set(otemperature,1));
  }  
}

  
 
  // Sleep until interrupt comes in on motion sensor but send update every minute. 
  tripped = false;  //reset tripped
  sleep(INTERRUPT,CHANGE, SLEEP_TIME);
}

float getLastPressureSamplesAverage()
{
  float lastPressureSamplesAverage = 0;
  for (int i = 0; i < LAST_SAMPLES_COUNT; i++)
  {
    lastPressureSamplesAverage += lastPressureSamples[i];
  }
  lastPressureSamplesAverage /= LAST_SAMPLES_COUNT;

  return lastPressureSamplesAverage;
}

// Algorithm found here
// http://www.freescale.com/files/sensors/doc/app_note/AN3914.pdf
// Pressure in hPa -->  forecast done by calculating kPa/h
int sample(float pressure)
{
  // Calculate the average of the last n minutes.
  int index = minuteCount % LAST_SAMPLES_COUNT;
  lastPressureSamples[index] = pressure;

  minuteCount++;
  if (minuteCount > 185)
  {
    minuteCount = 6;
  }

  if (minuteCount == 5)
  {
    pressureAvg = getLastPressureSamplesAverage();
  }
  else if (minuteCount == 35)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) // first time initial 3 hour
    {
      dP_dt = change * 2; // note this is for t = 0.5hour
    }
    else
    {
      dP_dt = change / 1.5; // divide by 1.5 as this is the difference in time from 0 value.
    }
  }
  else if (minuteCount == 65)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) //first time initial 3 hour
    {
      dP_dt = change; //note this is for t = 1 hour
    }
    else
    {
      dP_dt = change / 2; //divide by 2 as this is the difference in time from 0 value
    }
  }
  else if (minuteCount == 95)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) // first time initial 3 hour
    {
      dP_dt = change / 1.5; // note this is for t = 1.5 hour
    }
    else
    {
      dP_dt = change / 2.5; // divide by 2.5 as this is the difference in time from 0 value
    }
  }
  else if (minuteCount == 125)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    pressureAvg2 = lastPressureAvg; // store for later use.
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) // first time initial 3 hour
    {
      dP_dt = change / 2; // note this is for t = 2 hour
    }
    else
    {
      dP_dt = change / 3; // divide by 3 as this is the difference in time from 0 value
    }
  }
  else if (minuteCount == 155)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) // first time initial 3 hour
    {
      dP_dt = change / 2.5; // note this is for t = 2.5 hour
    }
    else
    {
      dP_dt = change / 3.5; // divide by 3.5 as this is the difference in time from 0 value
    }
  }
  else if (minuteCount == 185)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) // first time initial 3 hour
    {
      dP_dt = change / 3; // note this is for t = 3 hour
    }
    else
    {
      dP_dt = change / 4; // divide by 4 as this is the difference in time from 0 value
    }
    pressureAvg = pressureAvg2; // Equating the pressure at 0 to the pressure at 2 hour after 3 hours have past.
    firstRound = false; // flag to let you know that this is on the past 3 hour mark. Initialized to 0 outside main loop.
  }

  int forecast = UNKNOWN;
  if (minuteCount < 35 && firstRound) //if time is less than 35 min on the first 3 hour interval.
  {
    forecast = UNKNOWN;
  }
  else if (dP_dt < (-0.25))
  {
    forecast = THUNDERSTORM;
  }
  else if (dP_dt > 0.25)
  {
    forecast = UNSTABLE;
  }
  else if ((dP_dt > (-0.25)) && (dP_dt < (-0.05)))
  {
    forecast = CLOUDY;
  }
  else if ((dP_dt > 0.05) && (dP_dt < 0.25))
  {
    forecast = SUNNY;
  }
  else if ((dP_dt >(-0.05)) && (dP_dt < 0.05))
  {
    forecast = STABLE;
  }
  else
  {
    forecast = UNKNOWN;
  }

  // uncomment when debugging
  //Serial.print(F("Forecast at minute "));
  //Serial.print(minuteCount);
  //Serial.print(F(" dP/dt = "));
  //Serial.print(dP_dt);
  //Serial.print(F("kPa/h --> "));
  //Serial.println(weather[forecast]);

  return forecast;
}

and here are a couple of photos, front and back:
DSC_0669 (1).jpg
DSC_0668 (1).jpg

@ileneken3 and @sundberg84
Hi!
I agree with @sundberg84 , the only time I have had problems, and that is only once, is when I had a very noisy DC/DC booster connected. It took an extra 22uF capacitor at the output of the booster to get the radio to connect to the GW. The booster generated spikes of more than 150 mV peak. I connected the capacitor in the experimental area where Vcc and GND are available. I also switched the capacitor close to the radio to 22uF instead of 4.7 uF. For my next design, I will make sure to connect the radio directly to 2xAA as suggested many times

Ah! Sorry, misprint. Now using 2.2.0, not 2.0.0!

@UglyKidJoe
I have been using OpenHAB and MQTT for a number of years now.

The reason for using MQTT and not just a serial connection from the MySensors GW is partly the flexibility as many have stated previously here. Easy to test, using e.g. the mqtt.fx tool. If you want to know what is going on you simply connect to the MQTT stream and "snoop" on the messages.

Another reason is that I am running three geographical sites on one OH installation. OH is running on a NUC at my home. There is also an MQTT GW here. Two other My Sensors MQTT-GW are running remotely in two summer houses. The three GW connect over internet to a cloud-based MQTT broker and OH connects to the same broker. In that way I do not have to open any ports into my home network for access should I have had a local MQTT-broker at home.

Did you try commenting out #define MY_DEBUG ?
That might save you a few bytes.

OK!
Sorry but I cannot help you there. I don't know enough about the Serial GW. At least it seems OH is doing the right thing.

@Dawidi
Do you persist the relay states? This will make the previous state of the relays known after a restart of OH.
Check this information: https://www.openhab.org/docs/configuration/persistence.html

Filtering the power lines on input and output is generally not a critical issue when it comes to the value of the capacitors unless you plan to produce a large number of boards when cost of components become the issue.

If you are looking for a trouble-free operation it is better to be safe than sorry and to be conservative in the dimensioning. So 10 uF on the output is better than 2.2 since it provides more filtering of low frequency noise. 0.1 uF is better than 470 pF since it provides more filtering of high frequency noise. 10 uF on the input also filter out spikes in the input power, should there be any, so that they do not pass through the regulator. It is good practice to have both a 10 uF and a 0.1 uF capacitor on the output since they have different electrical capabilities to filter low and high frequency noise.

So in essence, the value of filtering capacitors is not that critical most of times. Too little filtering could give you issues with the radio, which is sensitive to noise on the power lines. This is why there always should be a capacitor of at least 4.7 uF close to the radio power input.

Yes, I take five consecutive readings 100 ms apart and calculate the median value of the readings that fall within allowed limits. Off-scale readings are discarded before calculating the median value.

It has been running for two weeks now and seems to be accurate and stable.

@sundeep-goel
Oh! This sounds a lot like the problems I have had for the past year. Like @zboblamont I have been pulling my hair trying to find a solution.

The tank is a square profile septic tank, cross section 1 x 1 m. Access to the tank is through a manhole some 60 cm diameter.

First i tried mounting the sensor in the lid of the manhole but all the time I ended up with measurements like 20 - 30 cm, no matter what the liquid level was.

I then tried to mount a baffle around the sensor trying to limit the beam spread so that the sensor would not see the corrugated wall of the manhole. No luck!

Next idea was to increase the powerfeed to the sensor. First it was powered from one of the digital pins of the Arduino, giving some 4.x volts. So, thinking this was below specs, I built a circuit that gave the sensor proper 5 V as needed. No luck!

The final solution was to mount the sensor at the bottom end of a plastic tube, 30 mm outer dia and then feed the cable through the tube and out to the electronics. The tube is attached to the wall of the manhole using a plastic clip. Please see attached photos. Success!

So clearly my problem was caused by the sensor getting reflexes from the corrugated wall of the manhole.

I think this question is best answered by a chemist, not an electronics expert. I do not claim to know much about water chemistry other than it is very complex. Probably pool water does not have the buffering capacity as the buffer solutions do so the measurements are affected by all other chemicals, gases and stuff in the water. But again, this is just what i learned from my father who indeed was a chemist.

@Crumpy10 The sendBatteryLevel is a method included in the library.
How do you connect MySensors to OpenHAB? Do you use the serial GW or MQTT? What binding do you use on the OH-side?
I am using MQTT myself so I am not that much at home with serial or with the MySensors binding for OH.

@mfalkvidd
Yep, this is a great way of introducing errors that will be nearly impossible to find!