Requesting value from Domoticz

gohan

The child ID is something you define when you present the sensors of the node

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@gohan Yes, I understand, but when I create a dummy text sensor I can't define its child ID. Can I find it somewhere?

gohan

You have to create a sensor in the sensor node sketch, assign a child ID to it and present it like the others sensors during setup, then it should show on the controller. I can't be more specific because I haven't worked on text sensors yet

? Offline

@gohan Dummy sensors are created in Domoticz, they don't use the MySensors library, so one doesn't upload any sketches to Arduino :)

What I want to achieve specifically is to send outside temperature received from WeatherUnderground to one of my MySensors nodes.

gohan

I know, but if you don't create a sensor able to receive the value, you can't send anything to it through the mysensors network

? Offline

@gohan hey, now I get it!

got it working the way I wanted, thank you so much :D

gohan

Just for my curiosity, why are you using the temperature from weather underground? Is it just displayed on a screen?

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@gohan I'm doing a project for my master's thesis.

There's a mathematical thermal model of a building running on MySensors node. I wanted to supply it with an information about actual outside temperature to have accurate results.

gohan

A real mysensors project would require an external node with temperature and humidity sensor 😁

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@gohan This model is just a small part of my project. But I get your concept.

There's already a DHT11 node running inside my house, measuring quantities that you've mentioned.

mar.conte

@tomek_olo
Sorry what is the way for send from domoticz child -node to other node through lua script for example Tanks

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@mar.conte I don't understand your question. Can you clarify, please?

mar.conte

@tomek_olo
Sorry what is the way for send from domoticz child -node to other node through lua script for example Tanks

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@mar.conte

OK, I'll try to describe everything I've done to get it working:

I'm presenting MySensors node to Domoticz as S_INFO: "present(CHILD_ID, S_INFO);"
Next step is to add this node in your Domoticz. It should be visible at first in "Devices" as a "Text" device. After you add it it will be present in the "Utility" tab.
Now you have to edit a text value of this device in Domoticz. (I think that's what interests you but in reverse) I'm using a "Device" script that updates this text value with outside temperature every time the weather is updated:

commandArray = {}
local tempOut = devicechanged["Outside_Temperature"]
local tempOutIdx = 25

if ( devicechanged["Outside"]) then
commandArray['UpdateDevice'] = otherdevices_idx['TextNode']..'|1|'..tempOut
end

Now when I want to download this new value to my node I use "request( CHILD_ID, V_TEXT );" and inside "receive()" function:

if (message.type == V_TEXT) {
if (message.sensor == CHILD_ID) {
outTemp = message.getFloat();
}
}

That's all, it's complicated. If you have any questions feel free to ask. I'll do my best to help.

gohan

If the temperature sensor is also running on a mysensors node, you can send the value from the node to the one with lcd screen directly without using the controller.

mar.conte

For send message to child node wich isnt present in device list? In other words i have a node wich is in device list and the child 's node called S_custom with id 200 .... the node id is 101...

ricorico94

Hi,
I've been trying to modify the sketch of Solar Powered Plant moisture sensor so that I can remotely control the sleep time from Domoticz.. But so far I failed.. ;-(
Sorry for the long post below, but I try to provide all details, as I don't understand what I did wrong..

I tried to understand several contributions including the ones above from dbemowsk (thank you also for your chat messages!) and tomek_olo, as well as the Water Pulse meter sensor , but I still don't succeed having the sensor receiving data from Domoticz.

Here's what I tried to do.
In Sensor, I reused the code from solar powered moisture sensor from other post (and that code is working on another sensor) then I modified it to:

present an additional child to Domoticz (CHILD_ID_SLEEP 2 with S_INFO) in setup
send a value (here 11) of V_VAR1 in setup as per the advise from dbemowsk so that domotic recognize that data field
then in Loop(), I have (apart the code for moisture sensor) a loop for requesting V_VAR1 (copied that from the water pulse meter sensor code)
outside Loop() (at bottom of script), I created the receive(const MyMessage &message) procedure (in code below, I tried to print to serial several debugging messages...)

Here's below the whole code:

#include <SPI.h>
#define MY_RADIO_NRF24
#define MY_DEBUG
#include <MySensors.h>

#define round(x) ((x)>=0?(long)((x)+0.5):(long)((x)-0.5))
#define N_ELEMENTS(array) (sizeof(array)/sizeof((array)[0]))

#define CHILD_ID_MOISTURE 0
#define CHILD_ID_BATTERY 1
#define CHILD_ID_SLEEP_S 2
// #define SLEEP_TIME_S 100 // Sleep time between reads (in seconds)
#define THRESHOLD 1.1 // Only make a new reading with reverse polarity if the change is larger than 10%.
#define STABILIZATION_TIME 1000 // Let the sensor stabilize before reading default BOD settings.
const int SENSOR_ANALOG_PINS[] = {A4, A5}; // Sensor is connected to these two pins. Avoid A3 if using ATSHA204. A6 and A7 cannot be used because they don't have pullups.

// MySensor gw;
MyMessage msg(CHILD_ID_MOISTURE, V_HUM);
MyMessage voltage_msg(CHILD_ID_BATTERY, V_VOLTAGE);
MyMessage sleep_msg(CHILD_ID_SLEEP_S, V_VAR1);
unsigned long SLEEP_TIME_S = 10;
unsigned long SLEEP_TIME = 10000;
long oldvoltage = 0;
byte direction = 0;
int oldMoistureLevel = -1;
float batteryPcnt;
float batteryVolt;
int LED = 5;
bool pcReceived = false;

void setup()
{
  pinMode(LED, OUTPUT);
  digitalWrite(LED, HIGH);
  delay(200);
  digitalWrite(LED, LOW);
  delay(200);
  digitalWrite(LED, HIGH);
  delay(200);
  digitalWrite(LED, LOW);
  SLEEP_TIME=SLEEP_TIME_S*1000;


sendSketchInfo("Plant moisture solar proto", "1.0");
// request(CHILD_ID_SLEEP_S, V_VAR1);
present(CHILD_ID_MOISTURE, S_HUM);
  delay(250);
present(CHILD_ID_BATTERY, S_MULTIMETER);
  for (int i = 0; i < N_ELEMENTS(SENSOR_ANALOG_PINS); i++) {
    pinMode(SENSOR_ANALOG_PINS[i], OUTPUT);
    digitalWrite(SENSOR_ANALOG_PINS[i], LOW);
  }
present(CHILD_ID_SLEEP_S, S_INFO);
send(sleep_msg.set(11));
}

void loop()
{
  pcReceived = false;
  int moistureLevel = readMoisture();

  // Send rolling average of 2 samples to get rid of the "ripple" produced by different resistance in the internal pull-up resistors
  // See http://forum.mysensors.org/topic/2147/office-plant-monitoring/55 for more information
  if (oldMoistureLevel == -1) { // First reading, save current value as old
    oldMoistureLevel = moistureLevel;
  }
  if (moistureLevel > (oldMoistureLevel * THRESHOLD) || moistureLevel < (oldMoistureLevel / THRESHOLD)) {
    // The change was large, so it was probably not caused by the difference in internal pull-ups.
    // Measure again, this time with reversed polarity.
    moistureLevel = readMoisture();
  }
send(msg.set((moistureLevel + oldMoistureLevel) / 2.0 / 10.23, 1));
  oldMoistureLevel = moistureLevel;
  
  int sensorValue = analogRead(A0);
  Serial.println(sensorValue);
  float voltage=sensorValue*(3.3/1023);
  Serial.println(voltage);
  batteryPcnt = (sensorValue - 248) * 0.72;
  batteryVolt = voltage;
sendBatteryLevel(batteryPcnt);
  resend((voltage_msg.set(batteryVolt, 3)), 10);

if (!pcReceived) {
      //Last sleept time not yet received from controller, request it again
      request(CHILD_ID_SLEEP_S, V_VAR1);
      Serial.print("Requested time sleep from gw VAR1");
      return;
    }


  digitalWrite(LED, HIGH);
  delay(200);
  digitalWrite(LED, LOW);
SLEEP_TIME=SLEEP_TIME_S*1000;  
sleep(SLEEP_TIME);
}

void resend(MyMessage &msg, int repeats)
{
  int repeat = 1;
  int repeatdelay = 0;
  boolean sendOK = false;

  while ((sendOK == false) and (repeat < repeats)) {
    if (send(msg)) {
      sendOK = true;
    } else {
      sendOK = false;
      Serial.print("Error ");
      Serial.println(repeat);
      repeatdelay += 500;
    } repeat++; delay(repeatdelay);
  }
}


int readMoisture() {
  pinMode(SENSOR_ANALOG_PINS[direction], INPUT_PULLUP); // Power on the sensor
  analogRead(SENSOR_ANALOG_PINS[direction]);// Read once to let the ADC capacitor start charging
  sleep(STABILIZATION_TIME);
  int moistureLevel = (1023 - analogRead(SENSOR_ANALOG_PINS[direction]));

  // Turn off the sensor to conserve battery and minimize corrosion
  pinMode(SENSOR_ANALOG_PINS[direction], OUTPUT);
  digitalWrite(SENSOR_ANALOG_PINS[direction], LOW);

  direction = (direction + 1) % 2; // Make direction alternate between 0 and 1 to reverse polarity which reduces corrosion
  return moistureLevel;
}

void receive(const MyMessage &message)
{
  if (message.type==V_TEXT) {
    // unsigned long infosleep=message.getULong();
    String infosleepstr=message.getString();
    unsigned long infosleep=infosleepstr.toInt();
    Serial.print("Received time sleep as string from gw:");
    Serial.println(infosleepstr);
    Serial.print("fin de msg");
    SLEEP_TIME_S = infosleep;
    pcReceived = true;
  }
  if (message.type==V_VAR1) {
    unsigned long infosleep=message.getULong();
    //unsigned long infosleep=message.getString();
    
    Serial.print("Received time sleep as VAR1 ULOng from gw:");
    Serial.println(infosleep);
    Serial.print("fin de msg");
    SLEEP_TIME_S = infosleep;
    pcReceived = true;
  }  
}

In Domoticz, in hardware I can see this:
0_1509627328360_hardware view.png
The sensor is the "proto" one (ID 1) where I can see the various children (Humidity=0 is normal as I did not attach the soil sensor and voltage is weird as it's not connected either).
In devices view, I have:
0_1509627449535_devices view.png
where I can see the text sensor of S_INFO which is set to "5" thanks to a user variable (see LUA script below).

I created a user variable "SondeSleep" with a LUA script (type "variables") to update the text sensor whenever the suer variable changes:

commandArray = {}
if ( uservariablechanged['SondeSleep']) then
print ("nouvelle valeur Level1 de SondeSleep:" .. uservariables['SondeSleep']);
ttidx=otherdevices_idx['SondeSolProto_Text_Sensor'];
commandArray['UpdateDevice']=ttidx..'|1|' .. uservariables['SondeSleep'] 
end
return commandArray

This script seems working since it replicates properly the vriable value to the text_sensor. I'm just confused by the command

commandArray['UpdateDevice']=ttidx..'|1|' .. uservariables['SondeSleep']

where I couldn't understand the meaning of the value between the || (here |1|).

The Domoticz website refers to LUA and JSON page, but I coudn't find the explanation. In 1 script of this post, I saw a 0, in another a 1.. I tried with both and also wit 2 (just in case it refers to Child ID ..) but no better result.
Could someone clarifies the meaning ?

When I run the sensor, I can only see (in serial monitor) the message "Requested time sleep from gw VAR1" from the "request" loop. and in Domoticz log, I can see that the sensor updates the humidity and voltage values, but that's all.

I'm also surprised I do'nt see any value in S_INFO child, but maybe it's normal.
I had tried to use V_TEXT instead of V_VAR1 everhwhere, but same result. There's definitely something I misunderstood somewehere.

Anyone could help me ?
ricorico94

gohan

Have you tried with a variable that is Integer instead of text or other? I am just guessing, as I haven't tried what you are doing yet.

ricorico94

well, one of my issues is that I don't understand how the V_VAR1 is managed by Domoticz. The website states that V_VARx exist for any kind of sensor, but in such case I don't understand how to define its value in Domoticz as V_VAR1 appears nowhere. So I used an integer user variable, then transtype to text and in my receive(à procedure, I was trying to transtype again to integer (or unsigned long)..
It's also why I had tried to replace all my V_VAR1 by V_TEXT, to be more homogenous.

dbemowsk

@ricorico94 If you are asking about V_VarX, I won't be much help. Back when I used Domoticz, V_VarX was not supported yet. I would be curious to see what the answer is though.

Requesting value from Domoticz

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