Tech Evangelist

Yes, selling boards (none commercially) is ok.

@mfalkvidd
Sorry, can't find any way of setting default options this this for the Solr forum plugin.

Sure!

henrik.ekblad@mysensors.org

.. and any updates you want to see in the text as well.

@zachflem sorry for your frustrations my friend. It's something we all experience every once in a while. Could you give us more details? Like serial logging and photo's of your wiring. Because people don't have X-ray eyes and they can't peek at your project table. So it's very hard to help when you have no eyes

@quby Looks to me as if the radio is not correctly connected. Because I'd expect more lines in the serial log. You could check:

• Whether wiring is correct.
• Whether the radio can get the power it needs

In most cases it's either one of these. But no expert on the MQTT gateway. Also share a photo of how you've connected everything. Because people can't help if they can't see what you're ding.

@dzjr If removed all unused variables and stuff. And the use of the bracelets was actually smart of you. Because you combined the different functions between them. The problem with it, is that is makes hard to read the code. So what I've done is I've made new functions of them outside the loop() and give them meaningful names. That way you have the lines of code, need for a specific function together in a method.
Especially when you start learning how to program, using functions is a good practice. It will help you understand the code better.

This code should work if it was only because the wait was removed. You need it in this case. It compiles, but I can't test it for you.

Thanks for the oliebol If you have any questions just ask. I'm glad that I could escape from the oudjaar-ellende so my thanx for that.

/******************************************************************
  Created with PROGRAMINO IDE for Arduino - 28.12.2018 12:45:52
  Project     :MySensors Watermeter Node RS485
  Libraries   :MySensors, Dallas temp etc
  Author      :MySensors community & dzjr
  Description :Mysensors Watermeter node & leiding temperatuur
              met lekkage detectie en optie voor waterdruk
******************************************************************/

#define MY_DEBUG

//RS 485 transport zaken
#define MY_RS485                  //RS-485 transport
#define MY_RS485_DE_PIN 11        //De DE pin benoemen, normaal is dit PIN-3
#define MY_RS485_BAUD_RATE 9600
//#define MY_RS485_MAX_MESSAGE_LENGTH 40
//#define MY_RS485_SOH_COUNT 3 // gebruiken bij Collision op de bus

//eerst wat administratie en dergelijk
#define SN "PWN_Node" //Software Naam
#define SV "1.01"      //Software versie
#define MY_NODE_ID 20 //Node nummer
#define MY_TRANSPORT_WAIT_READY_MS 3000    //wachten tot de gateway is opgestart


//libaries activeren
#include <MySensors.h>
#include <DallasTemperature.h>
#include <OneWire.h>
#include <Bounce2.h>

//Dallas settings
#define ONE_WIRE_BUS 7

#define TEMPERATURE_PRECISION 10 // 10 = 0,25°C 
#define MAX_ATTACHED_DS18B20 4

OneWire oneWire(ONE_WIRE_BUS); //Een oneWire-exemplaar instellen om te communiceren met alle OneWire-apparaten
DallasTemperature sensors(&oneWire); //OneWire naar Dallas

float lastTemperature[MAX_ATTACHED_DS18B20];

int numSensors = 0;
bool receivedConfig = false;
//bool metric = true;

DeviceAddress Probe03 = { 0x28, 0x80, 0x43, 0x77, 0x91, 0x0F, 0x02, 0x5A  }; // leiding temp
DeviceAddress Probe02 = { 0x28, 0xFF, 0x64, 0x1D, 0xF9, 0x9D, 0xDC, 0x5E  }; // op print1
DeviceAddress Probe01 = { 0x28, 0xFF, 0x64, 0x1D, 0xF8, 0x4F, 0x3A, 0x08  }; // op print2


MyMessage msgTemp(0, V_TEMP);

#define CHILD_ID_PWN 11                 //Child ID Sensor watermeter
#define CHILD_ID_LEKKAGE 21             //Child ID Lekkage sensor
#define CHILD_ID_DRUK 22                //Child ID Water druk sensor
#define PWN_SENSOR 2                    //Pin waar sensor watermeter op is aangesloten
#define LEKKAGE_PIN A0                  //Pin waarop de lekkage sensor op is aangesloten
#define WATERDRUK_PIN A1                //Pin waarom de druksensor is aangesloten
#define SENSOR_INTERRUPT PWN_SENSOR-2   //Usually the interrupt = pin -2 
#define PULSE_FACTOR 1000               //Pulsen per m³ water 1000=één rotatie per 10 liter
#define MAX_FLOW 60ul                     //flitert meetfouten eruit (40 van @RBisschops en 100 van @Rejoe) <-- Theo: ul toegevoegd hoef je niet te casten
#define wachtTime 5000ul              // Theo: added ul which makes it an unsigned long also mixing dutch and english in names is very confusing. At least to me.

MyMessage flowmsg (CHILD_ID_PWN, V_FLOW);
MyMessage volumemsg (CHILD_ID_PWN, V_VOLUME);
MyMessage lastcountermsg (CHILD_ID_PWN, V_VAR1);
MyMessage lekmsg (CHILD_ID_LEKKAGE, V_TEXT);
MyMessage drukmsg (CHILD_ID_DRUK, V_PRESSURE);

#define SEND_FREQUENCY 30000ul // Theo it's a constant 

double ppl = ((double)PULSE_FACTOR) / 1000;      // Pulses per liter
volatile unsigned long pulseCount = 0;
volatile unsigned long lastBlink = 0;
volatile double flow = 0;
boolean pcReceived = false; // Theo: This value never changes...???
unsigned long oldPulseCount = 0;

double oldflow = 0;
double volume = 0;
double oldvolume = 0;
unsigned long lastSend = 0;
unsigned long lastPulse = 0;
#define SLEEP_MODE false        // Watt-value can only be reported when sleep mode is false.

volatile unsigned long dryPulseCount = 0;
int lastdrukValue = 0;

// lowest and highest sensor readings:
const int sensorMin = 0;     // sensor minimum
const int sensorMax = 600;  // sensor maximum


void before() {
  wait(wachtTime); // Theo: Since this is only used one, a constant is not really needed. You can keep it for better readability
  sensors.begin(); // Theo: I always use meaningfull names. To me sensors is to vague, I'd use dallasSensors or temperatureSensors.
}

void setup() {
  sensors.setWaitForConversion(false);
  pinMode(PWN_SENSOR, INPUT_PULLUP);
  sensors.setResolution(TEMPERATURE_PRECISION);
  //  pulseCount = oldPulseCount = 0; // Theo not needed they're initialized with 0 in their declaration
  attachInterrupt(SENSOR_INTERRUPT, onPulse , FALLING );

  // Theo: initialize the array with 0.0 as a value.
  for (int i = 0; i < numSensors && i < MAX_ATTACHED_DS18B20; i++) {
    lastTemperature[MAX_ATTACHED_DS18B20] = 0.0;
  };
}

void presentation() {
  sendSketchInfo(SN, SV);

  numSensors = sensors.getDeviceCount();

  for (int i = 0; i < numSensors && i < MAX_ATTACHED_DS18B20; i++) {
    //  metric = getControllerConfig().isMetric;
    // Registreer alle sensors naar de Gateway
    present(i + 0, S_TEMP, "temp sensors");
    //present(i+1, S_TEMP, "MK Node temp");
    //present(i+2, S_TEMP, "PWN Leiding temp");
    present(CHILD_ID_PWN, S_WATER, "PWN_Meter");
    request(CHILD_ID_PWN, V_VAR1, "Req PWN data" );
    present(CHILD_ID_LEKKAGE, S_INFO, "Lekkage MK");
    present(CHILD_ID_DRUK, S_BARO, "PWN Waterdruk");
  }
}

unsigned long currentTime;

void sendPulseValue() {
  if (flow != oldflow) {
    oldflow = flow;

    // Check that we dont get unresonable large flow value.
    // could hapen when long wraps or false interrupt triggered
    if (flow < MAX_FLOW ) { // Theo: <-- cast (unsigned long) removed. No longer needed constant defined is ul (unsigned long) saves a bit of cpu time.
      send(flowmsg.set(flow, 2 ) ); // Send flow value to gw
    }
  }

  // No Pulse count received in 2min
  if (currentTime - lastPulse > 120000) {
    flow = 0;
  }

  // Pulse count has changed
  if (pulseCount != oldPulseCount) {
    oldPulseCount = pulseCount;
#ifdef MY_DEBUG
    Serial.print(F("pulsecnt:"));
    Serial.println(pulseCount);
#endif
    if (!pcReceived) { // Because this value never changes you're requesting the value from the gateway every other 30 seconds....??
      request(CHILD_ID_PWN, V_VAR1);
    }
    send(flowmsg.set(pulseCount));                  // Send  pulsecount value to gw in VAR1

    double volume = ((double)pulseCount / ((double)PULSE_FACTOR));
    if (volume != oldvolume) {
      oldvolume = volume;
#ifdef MY_DEBUG
      Serial.print(F("vol:"));
      Serial.println(volume, 3);
#endif
      send(volumemsg.set(volume, 3));               // Send volume value to gw
    }
  }
}

void sendWaterPressure() {
  //Waterdruk meten
  int Waterdruk = (analogRead(WATERDRUK_PIN)) * 10;
  if (Waterdruk != lastdrukValue) {
    send (drukmsg.set(Waterdruk));
    lastdrukValue = Waterdruk;
  }
}

void sendWaterLeakageText() {
  //waterlekkage sensor
  int lekLevel = map(analogRead(LEKKAGE_PIN), sensorMin, sensorMax, 0, 3);

  switch (lekLevel) {
    case 0:    // Sensor is droog
      send(lekmsg.set("Geen lekkage"));
      break;
    case 1:    // Sensor raakt nat
      send(lekmsg.set("Vochtig"));
      break;
    case 2:   // Sensor is volledig bedekt met water
      send(lekmsg.set("Lekkage"));
      break;
  }
}

void sendTemperatureValues() {
  //Dallas temperature sensoren
  // Fetch temperatures from Dallas sensors
  sensors.requestTemperatures();

  // query conversion time and sleep until conversion completed
  wait( sensors.millisToWaitForConversion( sensors.getResolution() ) );

  // 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 temperature = static_cast<float>(static_cast<int>((getControllerConfig().isMetric?sensors.getTempCByIndex(i):sensors.getTempFByIndex(i)) * 10.)) / 10.;
    float temperature;
    // voor geadreseerde sensoren
    switch (i)  {
      case 0:
        temperature = sensors.getTempC(Probe01);
        break;
      case 1:
        temperature = sensors.getTempC(Probe02);
        break;
      case 2:
        temperature = sensors.getTempC(Probe03);
        break;
      default:
        temperature = sensors.getTempCByIndex(Probe03);
        break;
    }

    // Only send data if temperature has changed and no error
    if ( lastTemperature[i] != temperature && temperature != -127.00 && temperature != 85.00) {

      // Send in the new temperature
      send( msgTemp.setSensor( i ).set( temperature, 1 ) );
      // Save new temperatures for next compare
      lastTemperature[i] = temperature;
    }
  }
}

void loop() {
  currentTime = millis();

  //Watermeter sensor
  //WaterPulse counter
  // Only send values at a maximum frequency or woken up from sleep
  if (currentTime - lastSend > SEND_FREQUENCY) {
    lastSend = currentTime;

    sendPulseValue();
    sendWaterPressure();
    sendWaterLeakageText();
    sendTemperatureValues();
  }
}

// unsigned long newBlink = 0; Theo: <-- removed from top because it's never used since it's a local in your interrupt handler
void onPulse() {
  if ( !SLEEP_MODE )  { // Theo: since you've declared it as a constant with value false the check is not needed. The evaluation of the if statement will always be true
    unsigned long newBlink = micros();
    unsigned long interval = newBlink - lastBlink;

    if (interval != 0) {
      lastPulse = millis();
      if (interval < 1000000L) {
        // Sometimes we get interrupt on RISING,  1000000 = 1sek debounce ( max 60 l/min)
        return;
      }
      flow = (60000000.0 / interval) / ppl;
    }
    lastBlink = newBlink;
  }
  pulseCount++;
  dryPulseCount++;
}

@dzjr here is the code with my comments. It compiles but I can't test it I use NRF24L01 and don't have any dallas temp sensors. I'll be cleaning up the code more like removing unused variables. Let's use that one for debugging purposes. Don't add anything else, because there's already a lot in it and it'll be harder to find the bug.

/******************************************************************
  Created with PROGRAMINO IDE for Arduino - 28.12.2018 12:45:52
  Project     :MySensors Watermeter Node RS485
  Libraries   :MySensors, Dallas temp etc
  Author      :MySensors community & dzjr
  Description :Mysensors Watermeter node & leiding temperatuur
              met lekkage detectie en optie voor waterdruk
******************************************************************/

#define MY_DEBUG

//RS 485 transport zaken
#define MY_RS485                  //RS-485 transport
#define MY_RS485_DE_PIN 11        //De DE pin benoemen, normaal is dit PIN-3
#define MY_RS485_BAUD_RATE 9600
//#define MY_RS485_MAX_MESSAGE_LENGTH 40
//#define MY_RS485_SOH_COUNT 3 // gebruiken bij Collision op de bus

//eerst wat administratie en dergelijk
#define SN "PWN_Node" //Software Naam
#define SV "1.01"      //Software versie
#define MY_NODE_ID 20 //Node nummer
#define MY_TRANSPORT_WAIT_READY_MS 3000    //wachten tot de gateway is opgestart


//libaries activeren
#include <MySensors.h>
#include <DallasTemperature.h>
#include <OneWire.h>
#include <Bounce2.h>

//Dallas settings
#define COMPARE_TEMP 0 // 1= zenden alleen bij verandering 0= direct zenden
#define ONE_WIRE_BUS 7
#define TEMPERATURE_PRECISION 10 // 10 = 0,25°C 
#define MAX_ATTACHED_DS18B20 4
unsigned long SLEEP_TIME = 3000; //slaaptijd tussen twee metingen in ms
OneWire oneWire(ONE_WIRE_BUS); //Een oneWire-exemplaar instellen om te communiceren met alle OneWire-apparaten
DallasTemperature sensors(&oneWire); //OneWire naar Dallas
float lastTemperature[MAX_ATTACHED_DS18B20];
int numSensors = 0;
bool receivedConfig = false;
//bool metric = true;

DeviceAddress Probe03 = { 0x28, 0x80, 0x43, 0x77, 0x91, 0x0F, 0x02, 0x5A  }; // leiding temp
DeviceAddress Probe02 = { 0x28, 0xFF, 0x64, 0x1D, 0xF9, 0x9D, 0xDC, 0x5E  }; // op print1
DeviceAddress Probe01 = { 0x28, 0xFF, 0x64, 0x1D, 0xF8, 0x4F, 0x3A, 0x08  }; // op print2


MyMessage msgTemp(0, V_TEMP);

#define CHILD_ID_PWN 11                 //Child ID Sensor watermeter
#define CHILD_ID_LEKKAGE 21             //Child ID Lekkage sensor
#define CHILD_ID_DRUK 22                //Child ID Water druk sensor
#define PWN_SENSOR 2                    //Pin waar sensor watermeter op is aangesloten
#define LEKKAGE_PIN A0                  //Pin waarop de lekkage sensor op is aangesloten
#define WATERDRUK_PIN A1                //Pin waarom de druksensor is aangesloten
#define SENSOR_INTERRUPT PWN_SENSOR-2   //Usually the interrupt = pin -2 
#define PULSE_FACTOR 1000               //Pulsen per m³ water 1000=één rotatie per 10 liter
#define MAX_FLOW 60ul                     //flitert meetfouten eruit (40 van @RBisschops en 100 van @Rejoe) <-- Theo: ul toegevoegd hoef je niet te casten
#define wachtTime 5000ul              // Theo: added ul which makes it an unsigned long also mixing dutch and english in names is very confusing. At least to me.

MyMessage flowmsg (CHILD_ID_PWN, V_FLOW);
MyMessage volumemsg (CHILD_ID_PWN, V_VOLUME);
MyMessage lastcountermsg (CHILD_ID_PWN, V_VAR1);
MyMessage lekmsg (CHILD_ID_LEKKAGE, V_TEXT);
MyMessage drukmsg (CHILD_ID_DRUK, V_PRESSURE);


//unsigned long SEND_FREQUENCY = 30000; // Minimum time between send (in milliseconds). We don't want to spam the gateway.
#define SEND_FREQUENCY 30000ul // Theo it's a constant 

double ppl = ((double)PULSE_FACTOR) / 1000;      // Pulses per liter
volatile unsigned long pulseCount = 0;
volatile unsigned long lastBlink = 0;
volatile double flow = 0;
boolean pcReceived = false;
unsigned long oldPulseCount = 0;
unsigned long newBlink = 0;
double oldflow = 0;
double volume = 0;
double oldvolume = 0;
unsigned long lastSend = 0;
unsigned long lastPulse = 0;
#define SLEEP_MODE false        // Watt-value can only be reported when sleep mode is false.
unsigned long maxTimeDryRun = 30000;
unsigned long startTimeDryRun = 0;
volatile unsigned long dryPulseCount = 0;

int lastlekValue = 0;
int lastdrukValue = 0;

// lowest and highest sensor readings:
const int sensorMin = 0;     // sensor minimum
const int sensorMax = 600;  // sensor maximum


void before() {
  wait(wachtTime); // Theo: Since this is only used one, a constant is not really needed. You can keep it for better readability
  sensors.begin(); // Theo: I always use meaningfull names. To me sensors is to vague, I'd use dallasSensors or temperatureSensors.
}

void setup() {
  sensors.setWaitForConversion(false);
  pinMode(PWN_SENSOR, INPUT_PULLUP);
  sensors.setResolution(TEMPERATURE_PRECISION);
  pulseCount = oldPulseCount = 0;
  attachInterrupt(SENSOR_INTERRUPT, onPulse , FALLING );
}

void presentation() {
  sendSketchInfo(SN, SV);

  numSensors = sensors.getDeviceCount();

  for (int i = 0; i < numSensors && i < MAX_ATTACHED_DS18B20; i++) {
    //  metric = getControllerConfig().isMetric;
    // Registreer alle sensors naar de Gateway
    present(i + 0, S_TEMP, "temp sensors");
    //present(i+1, S_TEMP, "MK Node temp");
    //present(i+2, S_TEMP, "PWN Leiding temp");
    present(CHILD_ID_PWN, S_WATER, "PWN_Meter");
    request(CHILD_ID_PWN, V_VAR1, "Req PWN data" );
    present(CHILD_ID_LEKKAGE, S_INFO, "Lekkage MK");
    present(CHILD_ID_DRUK, S_BARO, "PWN Waterdruk");
  }
}

unsigned long currentTime; // Theo: <--- removed declaration from loop. Not necessary but a good practice to make large variables global. That way heap gets less fragmented

void loop() {
  currentTime = millis();

  //Watermeter sensor
  //WaterPulse counter
  // Only send values at a maximum frequency or woken up from sleep
  if (currentTime - lastSend > SEND_FREQUENCY) {
    lastSend = currentTime;

    if (flow != oldflow) { // Theo <--- Removed the bracelet at the start of the line?
      oldflow = flow;
#ifdef MY_DEBUG_LOCAL
      Serial.print("l/min:");
      Serial.println(flow);
#endif
      // Check that we dont get unresonable large flow value.
      // could hapen when long wraps or false interrupt triggered
      if (flow < MAX_FLOW ) { // Theo: <-- cast (unsigned long) removed. No longer needed constant defined is ul (unsigned long) saves a bit of cpu time.
        send(flowmsg.set(flow, 2 ) ); // Send flow value to gw
      }
    }

    // No Pulse count received in 2min
    if (currentTime - lastPulse > 120000) {
      flow = 0;
    }

    // Pulse count has changed
    if (pulseCount != oldPulseCount) {
      oldPulseCount = pulseCount;
#ifdef MY_DEBUG
      Serial.print(F("pulsecnt:"));
      Serial.println(pulseCount);
#endif
      if (!pcReceived) {
        request(CHILD_ID_PWN, V_VAR1);
      }
      send(flowmsg.set(pulseCount));                  // Send  pulsecount value to gw in VAR1

      double volume = ((double)pulseCount / ((double)PULSE_FACTOR));
      if (volume != oldvolume) {
        oldvolume = volume;
#ifdef MY_DEBUG
        Serial.print(F("vol:"));
        Serial.println(volume, 3);
#endif
        send(volumemsg.set(volume, 3));               // Send volume value to gw
      }
    }


    //    { Theo
    //Waterdruk meten
    int Waterdruk = (analogRead(WATERDRUK_PIN)) * 10;
    if (Waterdruk != lastdrukValue) {
      send (drukmsg.set(Waterdruk));
      lastdrukValue = Waterdruk;
    }


    //waterlekkage sensor
    int lekLevel = map(analogRead(LEKKAGE_PIN), sensorMin, sensorMax, 0, 3);

    switch (lekLevel) {
      case 0:    // Sensor is droog
        send(lekmsg.set("Geen lekkage"));
        break;
      case 1:    // Sensor raakt nat
        send(lekmsg.set("Vochtig"));
        break;
      case 2:   // Sensor is volledig bedekt met water
        send(lekmsg.set("Lekkage"));
        break;
    }
    //    } Theo

    //    } Theo







    //    { Theo
    //Dallas temperature sensoren
    // Fetch temperatures from Dallas sensors
    sensors.requestTemperatures();
    // query conversion time and sleep until conversion completed
//    int16_t conversionTime = sensors.millisToWaitForConversion(sensors.getResolution());


//    wait(500);

    wait( sensors.millisToWaitForConversion( sensors.getResolution() ) );

    // 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 temperature = static_cast<float>(static_cast<int>((getControllerConfig().isMetric?sensors.getTempCByIndex(i):sensors.getTempFByIndex(i)) * 10.)) / 10.;
      float temperature;
      // voor geadreseerde sensoren
      switch (i)  {
        case 0:
          temperature = sensors.getTempC(Probe01);
          break;
        case 1:
          temperature = sensors.getTempC(Probe02);
          break;
        case 2:
          temperature = sensors.getTempC(Probe03);
          break;
        default:
          temperature = sensors.getTempCByIndex(Probe03);
          break;
      }


      // Only send data if temperature has changed and no error
      //#if COMPARE_TEMP == 1
      //      if (lastTemperature[i] != temperature && temperature != -127.00 && temperature != 85.00) {
      //#else
      if (temperature != -127.00 && temperature != 85.00) { // Theo: COMPARE_TEMP looks like a constant with value 0 so the #if looks unneeded to me.??
        //#endif

        // Send in the new temperature
        send( msgTemp.setSensor( i ).set( temperature, 1 ) );
        // Save new temperatures for next compare
        lastTemperature[i] = temperature;
      }
      //      } Theo
    }
  }
}

void onPulse() {
  if ( !SLEEP_MODE )  {
    unsigned long newBlink = micros();
    unsigned long interval = newBlink - lastBlink;

    if (interval != 0) {
      lastPulse = millis();
      if (interval < 1000000L) {
        // Sometimes we get interrupt on RISING,  1000000 = 1sek debounce ( max 60 l/min)
        return;
      }
      flow = (60000000.0 / interval) / ppl;
    }
    lastBlink = newBlink;
  }
  pulseCount++;
  dryPulseCount++;
}

Another MAX_ATTACHED_DS18B20 is 4. You only have 3 probes. This means that the 3rd and 4th will always report the same values.

@dzjr Would be so much easier to discuss it in Dutch

What is the problem you encounter at the moment?

I'm looking at the code, and just asking why you use so many unneeded blocks. e.g.

{ if (flow != oldflow) { // Theo <--- Removed the bracelet at the start of the line?
...

That first starting bracelet ({) is not needed because the part that is being executed if the if statement evaluates to true is after the last bracelet. I'll see if I can clean up the code a bit for you. I'll add comments with what I've changed.

@rejoe2 changing
wait(500);

to

wait( millisToWaitForConversion );

Should do the trick.
But wait has an unsigned long as parameter and your conversionTime is a signed int16_t, you might need to cast it. Best to update the millisWaitForConversion to unsigned long as well.

// This function helps to avoid a problem with the latest Dallas temperature library.
unsigned long millisToWaitForConversion(uint8_t bitResolution)
{
  switch (bitResolution) {
    case 9:
      return 94;
    case 10:
      return 188;
    case 11:
      return 375;
    default:
      return 750;
  }
}

But it's hard to help with only a fragment of the code. I'm guessing that the resolution doesn't change when your sketch is running. In that case I'd declare a global unsigned long conversionWaitDuration and initialize it in the setup. I honestly would never ever use a wait in a sketchs main loop though. I always use a none blocking wait which uses millis().

But again hard to help with coding when you can only see a fragment of the code.

You calculate the conversion time, but you don't use it. So it makes sense that you won't get any readings without a wait, because the sensors don't get anytime to read. You should wait for the conversionTime before you read the sensors. Which is I'm guessing shorter than 500 ms, but I don't use Dallas temp sensors. So no expert on that.