From 0643e42b76ede60e99837ced18de0d0dc813f655 Mon Sep 17 00:00:00 2001
From: Prashant <prashant@prithvitech.com>
Date: Sun, 19 Oct 2014 22:36:33 +0530
Subject: [PATCH 1/2] Modifications by Prashant : An extra no arguments
 constructor to simplify multiple OneWire buse use, allowing for easier
 construction of arrays of OneWire buses, in the limited environment provided
 by Arduino. See the Multibus_simple example illustrating a use-case of the
 extension.

---
 OneWire.cpp                                  | 13 +++++-
 OneWire.h                                    |  2 +
 README.md                                    |  5 ++
 examples/Multibus_simple/Multibus_simple.ino | 48 ++++++++++++++++++++
 4 files changed, 67 insertions(+), 1 deletion(-)
 create mode 100644 examples/Multibus_simple/Multibus_simple.ino

diff --git a/OneWire.cpp b/OneWire.cpp
index 81d1a92..e570ec2 100644
--- a/OneWire.cpp
+++ b/OneWire.cpp
@@ -1,6 +1,11 @@
 /*
 Copyright (c) 2007, Jim Studt  (original old version - many contributors since)
 
+Modifications by Prashant : An extra no arguments constructor to simplify 
+multiple OneWire buse use, allowing for easier construction of arrays of OneWire buses,
+in the limited environment provided by Arduino.
+See the Multibus_simple example illustrating a use-case of the extension.
+
 Version 2.3: Modifications by Norbert Truchsess, January 2013
   add search_alarms() to find only devices in alarmed state.
 
@@ -122,7 +127,8 @@ sample code bearing this copyright.
 #include "OneWire.h"
 
 
-OneWire::OneWire(uint8_t pin)
+OneWire::OneWire() {}
+void OneWire::setPin(uint8_t pin)
 {
 	pinMode(pin, INPUT);
 	bitmask = PIN_TO_BITMASK(pin);
@@ -132,6 +138,11 @@ OneWire::OneWire(uint8_t pin)
 #endif
 }
 
+OneWire::OneWire(uint8_t pin)
+{
+	setPin(pin);
+}
+
 
 // Perform the onewire reset function.  We will wait up to 250uS for
 // the bus to come high, if it doesn't then it is broken or shorted
diff --git a/OneWire.h b/OneWire.h
index 7acd488..ace3255 100644
--- a/OneWire.h
+++ b/OneWire.h
@@ -126,6 +126,8 @@ class OneWire
 #endif
 
   public:
+    OneWire();
+    void setPin(uint8_t pin);
     OneWire( uint8_t pin);
 
     // Perform a 1-Wire reset cycle. Returns 1 if a device responds
diff --git a/README.md b/README.md
index a0f9c8c..aedd7a2 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,10 @@
 Copyright (c) 2007, Jim Studt  (original old version - many contributors since)
 
+Modifications by Prashant : An extra no arguments constructor to simplify 
+multiple OneWire buse use, allowing for easier construction of arrays of OneWire buses,
+in the limited environment provided by Arduino.
+See the Multibus_simple example illustrating a use-case of the extension.
+
 Version 2.3: Modifications by Norbert Truchsess, January 2013
   add search_alarms() to find only devices in alarmed state.
 
diff --git a/examples/Multibus_simple/Multibus_simple.ino b/examples/Multibus_simple/Multibus_simple.ino
new file mode 100644
index 0000000..a818e07
--- /dev/null
+++ b/examples/Multibus_simple/Multibus_simple.ino
@@ -0,0 +1,48 @@
+#include <OneWire.h>
+#include <DallasTemperature.h>
+
+int oneWirePins[]={3,7};//OneWire DS18x20 temperature sensors on these wires
+const int oneWirePinsCount=sizeof(oneWirePins)/sizeof(int);
+
+OneWire ds18x20[oneWirePinsCount];
+DallasTemperature sensor[oneWirePinsCount];
+
+
+void setup(void) {
+  // start serial port
+  Serial.begin(9600);
+  Serial.println("Dallas Temperature Multiple Bus Control Library Simple Demo");
+  Serial.print("============Ready with ");
+  Serial.print(oneWirePinsCount);
+  Serial.println(" Sensors================");
+  
+  // Start up the library on all defined bus-wires
+  DeviceAddress deviceAddress;
+  for (int i=0; i<oneWirePinsCount; i++) {;
+    ds18x20[i].setPin(oneWirePins[i]);
+    sensor[i].setOneWire(&ds18x20[i]);
+    sensor[i].begin();
+    if (sensor[i].getAddress(deviceAddress, 0)) sensor[i].setResolution(deviceAddress, 12);
+  }
+  
+}
+
+void loop(void) {
+  // call sensors.requestTemperatures() to issue a global temperature 
+  // request to all devices on the bus
+  Serial.print("Requesting temperatures...");
+  for (int i=0; i<oneWirePinsCount; i++) {
+    sensor[i].requestTemperatures();
+  }
+  Serial.println("DONE");
+  
+  delay(1000);
+  for (int i=0; i<oneWirePinsCount; i++) {
+    float temperature=sensor[i].getTempCByIndex(0);
+    Serial.print("Temperature for the sensor ");
+    Serial.print(i);
+    Serial.print(" is ");
+    Serial.println(temperature);
+  }
+  Serial.println();
+}

From 752f02cb856105a6d30239eff1e8e088a7e0fd3f Mon Sep 17 00:00:00 2001
From: Prashant <prashant@prithvitech.com>
Date: Sun, 19 Oct 2014 22:38:34 +0530
Subject: [PATCH 2/2] Added a comment

---
 OneWire.cpp | 1 +
 README.md   | 1 +
 2 files changed, 2 insertions(+)

diff --git a/OneWire.cpp b/OneWire.cpp
index e570ec2..ca330fc 100644
--- a/OneWire.cpp
+++ b/OneWire.cpp
@@ -5,6 +5,7 @@ Modifications by Prashant : An extra no arguments constructor to simplify
 multiple OneWire buse use, allowing for easier construction of arrays of OneWire buses,
 in the limited environment provided by Arduino.
 See the Multibus_simple example illustrating a use-case of the extension.
+Use in conjunction with my modification of the DallasTemperature library.
 
 Version 2.3: Modifications by Norbert Truchsess, January 2013
   add search_alarms() to find only devices in alarmed state.
diff --git a/README.md b/README.md
index aedd7a2..c9e877a 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@ Modifications by Prashant : An extra no arguments constructor to simplify
 multiple OneWire buse use, allowing for easier construction of arrays of OneWire buses,
 in the limited environment provided by Arduino.
 See the Multibus_simple example illustrating a use-case of the extension.
+Use in conjunction with my modification of the DallasTemperature library.
 
 Version 2.3: Modifications by Norbert Truchsess, January 2013
   add search_alarms() to find only devices in alarmed state.