Domotiocz + Rain gauge

[sundberg84]

Hi!

Has anyone a sketch with a tipping bucket posting to domoticz?
I have tried MySensors tippingbucket and also Water pulse meter sketch but cant figure it out...

Thanx
Andreas

[sundberg84]

This is my rainsensor/tipping bucket for MySensors that works with Domoticz.

It uses 2xAA as power source, a Pro Mini 3.3v with a 0.9 to 3.3 booster.
The bucket has a magnet which triggeras a reed switch which triggers an interrupt pin.
I also use battery sensing with voltage divider.

// Enable debug prints to serial monitor
#define MY_DEBUG 
#define MY_RADIO_NRF24
#define MY_NODE_ID 7

#include <SPI.h>
#include <MySensor.h>  

// Running this in Domoticz stable version 2.5 will not work - upgrade to beta.

#define DIGITAL_INPUT_SENSOR 3                  // The reed switch you attached.  (Only 2 and 3 generates interrupt!)
#define INTERRUPT DIGITAL_INPUT_SENSOR-2        // Usually the interrupt = pin -2 (on uno/nano anyway)

#define CHILD_ID 1                              // Id of the sensor child
#define SKETCH_NAME "Rain Gauge"                // Change to a fancy name you like
#define SKETCH_VERSION "1.1"                    // Your version

unsigned long SLEEP_TIME = 18*60000;            // Sleep time (in milliseconds).
//unsigned long SLEEP_TIME = 20000;             // use this instead for debug

float hwRainVolume = 0;                         // Current rainvolume calculated in hardware.
int hwPulseCounter = 0;                         // Pulsecount recieved from GW
float fullCounter = 0;                           // Counts when to send counter
float bucketSize = 0.5;                           // Bucketsize mm, needs to be 1, 0.5, 0.25, 0.2 or 0.1
boolean pcReceived = false;                     // If we have recieved the pulscount from GW or not 
boolean reedState;                              // Current state the reedswitch is in
boolean oldReedState;                           // Old state (last state) of the reedswitch
unsigned long lastSend =0;                      // Time we last tried to fetch counter.

MyMessage volumeMsg(CHILD_ID,V_RAIN);
MyMessage lastCounterMsg(CHILD_ID,V_VAR1);

//=========================
// BATTERY VOLTAGE DIVIDER SETUP
// 1M, 470K divider across battery and using internal ADC ref of 1.1V
// Sense point is bypassed with 0.1 uF cap to reduce noise at that point
// ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
// 3.44/1023 = Volts per bit = 0.003363075
#define VBAT_PER_BITS 0.003363075  
#define VMIN 1.9                                  //  Vmin (radio Min Volt)=1.9V (564v)
#define VMAX 3.0                                  //  Vmax = (2xAA bat)=3.0V (892v)
int batteryPcnt = 0;                              // Calc value for battery %
int batLoop = 0;                                  // Loop to help calc average
int batArray[3];                                  // Array to store value for average calc.
int BATTERY_SENSE_PIN = A0;                       // select the input pin for the battery sense point
//=========================

void presentation() {

  // Send the Sketch Version Information to the Gateway
  sendSketchInfo(SKETCH_NAME, SKETCH_VERSION);

  // Register this device as Rain sensor (will not show in Domoticz until first value arrives)
  present(CHILD_ID, S_RAIN);       
}


void setup()  
{  
  // use the 1.1 V internal reference
  analogReference(INTERNAL);             // For battery sensing
  
  pinMode(DIGITAL_INPUT_SENSOR, INPUT_PULLUP);  // sets the reed sensor digital pin as input

  reedState = digitalRead(DIGITAL_INPUT_SENSOR); // Read what state the reedswitch is in
  oldReedState = reedState; // Set startup position for reedswitch 
  
  Serial.println("Startup completed");
}

void loop()     
{ 
unsigned long currentTime = millis();

    //See if we have the counter/pulse from Domoticz - and ask for it if we dont.
    if (!pcReceived && (currentTime - lastSend > 5000)) {      
      request(CHILD_ID, V_VAR1);
      lastSend=currentTime;
      return;
    }
    if (!pcReceived) {
      return;
    }
    
//Read if the bucket tipped over
reedState = digitalRead(DIGITAL_INPUT_SENSOR);
boolean tipped = oldReedState != reedState; 

    //BUCKET TIPS!
    if (tipped==true) {
    Serial.println("The bucket has tipped over...");
    oldReedState = reedState;
    hwRainVolume = hwRainVolume + bucketSize;
    send(volumeMsg.set((float)hwRainVolume,1));
    wait(1000);
    fullCounter = fullCounter + bucketSize;

      //Count so we send the counter for every 1mm
      if(fullCounter >= 1){
      hwPulseCounter++;
      send(lastCounterMsg.set(hwPulseCounter));
      wait(1000);
      fullCounter = 0;
      }
      
    }
    
    if (tipped==false) {

     //No bucket tipped over last sleep-period, check battery then...
     batM(); 
    }

lastSend=currentTime;
sleep(INTERRUPT, CHANGE, SLEEP_TIME); 
//The interupt can be CHANGE or FALLING depending on how you wired the hardware.
}

//Read if we have a incoming message.
void receive(const MyMessage &msg) {
    if (msg.type==V_VAR1) {
    hwPulseCounter = msg.getULong();
    hwRainVolume = hwPulseCounter;
    pcReceived = true;
    Serial.print("Received last pulse count from gw: ");
    Serial.println(hwPulseCounter);   
    }
}

void batM(){  //The battery calculations
  
   delay(500);
   // Battery monitoring reading
   int sensorValue = analogRead(BATTERY_SENSE_PIN);    
   delay(500);
   
   // Calculate the battery in %
   float Vbat  = sensorValue * VBAT_PER_BITS;
   int batteryPcnt = static_cast<int>(((Vbat-VMIN)/(VMAX-VMIN))*100.);
   Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %");  
   
   // Add it to array so we get an average of 3 (3x20min)
   batArray[batLoop] = batteryPcnt;
  
   if (batLoop > 1) {  
     batteryPcnt = (batArray[0] + batArray[1] + batArray[2]);
     batteryPcnt = batteryPcnt / 3;
 
   if (batteryPcnt > 100) {
     batteryPcnt=100;
 }
 
     Serial.print("Battery Average (Send): "); Serial.print(batteryPcnt); Serial.println(" %");
       sendBatteryLevel(batteryPcnt);
       batLoop = 0;
       
     //Sends 1 per hour as a heartbeat.
     send(volumeMsg.set((float)hwRainVolume,1));   
     send(lastCounterMsg.set(hwPulseCounter));
     }
     else 
     {
     batLoop++;
     }
}

[sundberg84]

This is great!
1 year - times fly by, but my rainsensor is going strong!

I just wanted to celebrate 1 year for my Rainsensor on batteries, reporting every hour (or less when it rains). Still going strong and 81% battery left! Except for some range issues in the beginning you can see its working as it should:

Also It will be my (almost) 1000th post so thank you all for making MySensors such a great community. I just love every minute here!

[mrwomble]

@sundberg84 Wow, that is impressive! What type of batteries are you using?

I'm waiting for parts to come in to start building some battery powered and external sensors.

[sundberg84]

@mrwomble - 2xAA

[Qu3Uk]

Thats impressive, out of interest are you doing anything with this data in domotiocz?

[sundberg84]

@Qu3Uk nope, just monitoring. I could probably use it for watering if I made some actuators... but not that garden interested.

[sincze]

@sundberg84 , very nice. I would say.. I want that as well ;-)
any suggestions for a shopping and modification list?
As I don't have a 3D printer to print the thing myself.

[sundberg84]

@sincze - its not a 3d printed box, its an old 433mhz tip sensor.
There is something similar on mysensors shop :http://www.ebay.com/itm/misol-Spare-part-for-weather-station-to-measure-the-rain-volume-for-rain-meter-/271862662076?hash=item3f4c4703bc:g:IGsAAOSwq7JT8vJY&rmvSB=true

[TheoL]

@sundberg84 Just playing with your sketch, because it's easier for my to understand than the one one the build page. I'm curious about how domoticz handles these values. I don't see you reset the hwRainVolume variable. So does this mean that this is an ever increasing value that must be send to Domoticz?

[sundberg84]

@TheoL - Correct.
There is a countervalue and Domoticz calculates the value from midnight each night.

[TheoL]

@sundberg84 Thanx for your fast reply. So what happens when the float resets to 0?

[TheoL]

@sincze Hello my friend, just curious how many sensors you've got hooked up at the moment?

[sundberg84]

@TheoL - Just to add what we discussed in chat for future questions - If float would hit the maximum value (which is hugh so lets hope its not a problem) im not sure what will happen...

[TheoL]

@sundberg84 It's also not a concern of the MySensors node. This should be handled by Domoticz. I really like your sketch, it works like a charm. I modified it to my needs so that I can run the node without the sleep. Still need to think of an hourly heart beat. But almost there.

[sundberg84]

@TheoL - If you modify the sketch with a heartbeat() please post it :) Im interested as well!

[TheoL]

@AWI do you happen to know if the pulse counter in Domoticz is a 1mm pulse counter? Or is it a real tip pulse counter? Right know where checking whenever the rain fall exceeds 1mm and send a pulse ++ in that case. Meaning we miss some pulse counts when we reset the node.

[AWI]

@TheoL My rain meter counts in 1 mm resolution but I am sending actual total (in mm) from the start of sensor and keep totals in EEPROM.

[TheoL]

@AWI (Glad that your back, hope you're doing allright) So, if I understand your setup correctly you don't send the pulse count to Domoticz? I kind of like it, because that way I can reset the rain sensor many times and still keep the rain fall log in sync, without using the EPROM.

And my rain sensor did reset a couple of times. I had to put a diode (Dutch name is blus diode) between the two wires coming out from the rain gauge to prevent this.

[AWI]

@TheoL (i'm fine, thank you) That is what i'm doing. The only thing what I need to do after a reset is delete the miscalculation in Domoticz (easy). My sensor (oregon) uses a 'reed' switch (no induction). I MySensoriz'ed it without losing the original circuitry and function. (so in parallel).