Arduino ethernet sheild with onewire thermometers

Projects Programming
1

My code works and sends to Exosite but it dosn't read all three sensors it mashes them all and give's me a 32 F. I had some code from another project that addressed each sensor but when i mixed it in here it just became a mess looking for the easyst way to coded it. Thanks in advance for the help

/*
Exosite Arduino Basic Temp Monitor 2 (updated to use Exosite library)

This sketch shows an example of sending data from a connected
sensor to Exosite. (http://exosite.com) Code was used from various
public examples including the Arduino Ethernet examples and the OneWire
Library examples found on the Arduino playground.
(OneWire Lib credits to Jim Studt, Tom Pollard, Robin James, and Paul Stoffregen)

This code keeps track of how many milliseconds have passed
and after the user defined REPORT_TIMEOUT (default 60 seconds)
reports the temperature from a Dallas Semi DS18B20 1-wire temp sensor.
The code sets up the Ethernet client connection and connects / disconnects
to the Exosite server when sending data.

Assumptions:

Hardware:

  • Arduino Duemilanove or similiar
  • Arduino Ethernet Shield
  • Dallas Semiconductor DS18B20 1-Wire Temp sensor used in parasite power mode (on data pin 7, with 4.7k pull-up)

Version History:

  • 1.0 - November 8, 2010 - by M. Aanenson
  • 2.0 - July 6, 2012 - by M. Aanenson
  • 3.0 - October 25, 2013 - by M. Aanenson - Note: Updated to use latest Exosite Arduino Library

*/

#include <SPI.h>
#include <Ethernet.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <Exosite.h>

// Pin use
#define ONEWIRE 7 //pin to use for One Wire interface

// Set up which Arduino pin will be used for the 1-wire interface to the sensor
OneWire oneWire(ONEWIRE);
DallasTemperature sensors(&oneWire);

/*==============================================================================

  • Configuration Variables
  • Change these variables to your own settings.
    =============================================================================/
    String cikData = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; // <-- FILL IN YOUR CIK HERE! (https://portals.exosite.com -> Add Device)
    byte macData[] = {0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx}; // <-- FILL IN YOUR Ethernet shield's MAC address here.

// User defined variables for Exosite reporting period and averaging samples
#define REPORT_TIMEOUT 30000 //milliseconds period for reporting to Exosite.com
#define SENSOR_READ_TIMEOUT 5000 //milliseconds period for reading sensors in loop

/*==============================================================================

  • End of Configuration Variables
    =============================================================================/

class EthernetClient client;
Exosite exosite(cikData, &client);

//
// The 'setup()' function is the first function that runs on the Arduino.
// It runs completely and when complete jumps to 'loop()'
//
void setup() {
Serial.begin(9600);
Serial.println("Boot");
// Start up the OneWire Sensors library
sensors.begin();
delay(1000);
Serial.println("Starting Exosite Temp Monitor");
Ethernet.begin(macData);
// wait 3 seconds for connection
delay(3000);

}

//
// The 'loop()' function is the 'main' function for Arduino
// and is essentially a constant while loop.
//
void loop() {
static unsigned long sendPrevTime = 0;
static unsigned long sensorPrevTime = 0;
static float tempF;
char buffer[7];
String readParam = "";
String writeParam = "";
String returnString = "";

Serial.print("."); // print to show running

// Read sensor every defined timeout period
if (millis() - sensorPrevTime > SENSOR_READ_TIMEOUT) {
Serial.println();
Serial.println("Requesting temperature...");
sensors.requestTemperatures(); // Send the command to get temperatures
float tempC = sensors.getTempCByIndex(0);
Serial.print("Celsius: ");
Serial.print(tempC);
Serial.println(" C ..........DONE");
tempF = DallasTemperature::toFahrenheit(tempC);
Serial.print("Fahrenheit: ");
Serial.print(tempF);
Serial.println(" F ..........DONE");

sensorPrevTime = millis();
}

// Send to Exosite every defined timeout period
if (millis() - sendPrevTime > REPORT_TIMEOUT) {
Serial.println(); //start fresh debug line
Serial.println("Sending data to Exosite...");

readParam = ""; //nothing to read back at this time e.g. 'control&status' if you wanted to read those data sources
writeParam = "temp="; //parameters to write e.g. 'temp=65.54' or 'temp=65.54&status=on'

String tempValue = dtostrf(tempF, 1, 2, buffer); // convert float to String, minimum size = 1, decimal places = 2

writeParam += tempValue; //add converted temperature String value

//writeParam += "&message=hello"; //add another piece of data to send

if ( exosite.writeRead(writeParam, readParam, returnString)) {
Serial.println("Exosite OK");
if (returnString != "") {
Serial.println("Response:");
Serial.println(returnString);
}
}
else {
Serial.println("Exosite Error");
}

sendPrevTime = millis(); //reset report period timer
Serial.println("done sending.");
}
delay(1000); //slow down loop
}

2

It looks to me like you're only reading on sensor with with that code. I'm not as familiar with that example as the others, but I'm pretty sure you'll need to make multiple calls to sensors.getTempCByIndex(0); with three different indices. Also, I'm pretty sure that call returns 0 (so 32 in F) when it can't read anything, so you might not actually be reading any sensors.