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Arduino Forum Arduino - The Temperature part is not working
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Forum Thread Details
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  • Replies 9 replies
  • Subscribers 392 subscribers
  • Views 1229 views
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  • help
  • sensors
  • temperature
  • arduino
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Related

Arduino - The Temperature part is not working

Former Member
Former Member over 10 years ago

Hi guys,

The program works perfectly fine though i am not getting the right temperature value. it keeps giving me 127. which is not correct.

i can't seem to understand the problem with the program. Any Help is highly appreciated !!!

Thanks in advance !!!

 

#include <DallasTemperature.h>

#define ONE_WIRE_BUS 24 

// Setup a oneWire instance to communicate with any OneWire devices 
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);

int temp;
int temp2;
void setup(){
Serial.begin(9600);
}
void loop(){
  sensors.begin();
  cValve.write(90); 
  delay(10000);
  //getting the average value
  temp = averageTemperature (); 
  cValve.write(0); 
  delay(3000); //3 seconds 
  
  hValve.write(90);
  delay(10000); //giving 10 second, in order to get a precise temperature
  temp2 = averageTemperature (); 
  hValve.write(0); 
  delay(3000); //3 seconds
  }

  int TemperatureRead(){
  sensors.begin();
  temp = sensors.getTempCByIndex(0); //reads the temperature and stores it in temp
  return temp;
  }

//Function for getting average Temperature Values
int averageTemperature()
{
  TemperatureRead(); // discard first sample (never hurts to be safe)

  int averageTemperature; //For holding the running average
  for (int i = 1; i < 10; i++) 
 averageTemperature += ((TemperatureRead() - averageTemperature)/(int)i); .

  return averageTemperature; // return the Average Temperature

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Top Replies

  • mcb1
    mcb1 over 10 years ago +2
    jerrymz Terry You have some unanswered questions in this post http://www.element14.com/community/message/148721/l/re-arduino--two-inputs-using-the-keypad#148721 Perhaps you could return and answer the…
  • neilk
    neilk over 10 years ago +1
    jerrymz Hi Terry assuming that you are actually reading the temperature and getting a sensible result (have you checked?), then your formula for calculating average temperature looks a bit odd to me -…
  • gadget.iom
    gadget.iom over 10 years ago in reply to neilk +1
    Neil Kenyon wrote: A simple debugging technique is to print out intermediate results of your calculations to the serial monitor: Couldn't agree more...
Parents
  • fvan
    0 fvan over 10 years ago

    Hi,

     

    do you have more information on the setup ? Which sensor are you using and how is it connected to the Arduino ?

     

    Using a 1-Wire temperature sensor on the Pi, I had to use a 10k pull-up on the data line. Is this the case in your setup ? See [CaTS] ForgetMeNot - Week 8: Water dispenser and temperature in the "water temperature" paragraph.

     

    Frederick

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  • fvan
    0 fvan over 10 years ago

    Hi,

     

    do you have more information on the setup ? Which sensor are you using and how is it connected to the Arduino ?

     

    Using a 1-Wire temperature sensor on the Pi, I had to use a 10k pull-up on the data line. Is this the case in your setup ? See [CaTS] ForgetMeNot - Week 8: Water dispenser and temperature in the "water temperature" paragraph.

     

    Frederick

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  • Former Member
    0 Former Member over 10 years ago in reply to fvan

    Yes, i am using a 4.7K resistor.

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