first working prototype.

main/adresses.txt

@@ -0,0 +1,6 @@
+Found 2 devices.
+
+Printing addresses...
+black : 0x28, 0xFF, 0x64, 0x1F, 0x79, 0xD1, 0xB1, 0x75
+red : 0x28, 0xFF, 0x64, 0x1F, 0x79, 0xD7, 0xDA, 0x9A
+

main/main.ino

@@ -1,4 +1,6 @@
-
+/* References:
+ * https://lastminuteengineers.com/multiple-ds18b20-arduino-tutorial/
+*/
 #include "ArduinoJson.h"
 
 #include <OneWire.h>
@@ -6,25 +8,34 @@
 
 // Data wire is conntec to the Arduino digital pin 4
 #define ONE_WIRE_BUS 2
-#define MOSFET 3
+#define MOSFET1 3
+#define MOSFET2 4
 // Setup a oneWire instance to communicate with any OneWire devices
 OneWire oneWire(ONE_WIRE_BUS);
 
 // Pass our oneWire reference to Dallas Temperature sensor 
 DallasTemperature sensors(&oneWire);
-
-
+DeviceAddress Thermometer;
+int deviceCount = 0;
 
 int analogPin = 2;
 int data = 0;
 char userInput;
 char* commandVer;
+// temperature values in °C 
 float tempSensor1;
 float tempSensor2;
+// HighTemp - when to turn on the power
 float HTemp1 = 12.0;
-float HTemp2;
+float HTemp2 = 16.0;
+// LowTemp - when to turn of the power
 float LTemp1 = 10.0;
-float LTemp2;
+float LTemp2 = 14.0;
+
+uint8_t addrSensor1[8] = { 0x28, 0xFF, 0x64, 0x1F, 0x79, 0xD1, 0xB1, 0x75 };
+uint8_t addrSensor2[8] = { 0x28, 0xFF, 0x64, 0x1F, 0x79, 0xD7, 0xDA, 0x9A };
+/*
+
 // countLowTemp
 int cLTemp1 = 0;
 int cLTemp2 = 0;
@@ -34,12 +45,34 @@ int cHTemp2 = 0;
 // loops to count temp before switching state
 int cTemp = 5;
 
+*/
+
 void setup() {
   // put your setup code here, to run once:
-  pinMode(MOSFET, OUTPUT);
+  pinMode(MOSFET1, OUTPUT);
  
   Serial.begin(9600);
   sensors.begin();
+
+
+
+   // locate devices on the bus
+  Serial.println("Locating devices...");
+  Serial.print("Found ");
+  deviceCount = sensors.getDeviceCount();
+  Serial.print(deviceCount, DEC);
+  Serial.println(" devices.");
+  Serial.println("");
+  
+  Serial.println("Printing addresses...");
+  for (int i = 0;  i < deviceCount;  i++)
+  {
+    Serial.print("Sensor ");
+    Serial.print(i+1);
+    Serial.print(" : ");
+    sensors.getAddress(Thermometer, i);
+    printAddress(Thermometer);
+  }
 }
 
 void loop() {
@@ -51,18 +84,31 @@ void loop() {
   Serial.print("Sens 1 ");  
   Serial.print("Celsius temperature: ");
   // Why "byIndex"? You can have more than one IC on the same bus. 0 refers to the first IC on the wire
-  Serial.print(sensors.getTempCByIndex(0)); 
+  Serial.print(sensors.getTempC(addrSensor1)); 
   Serial.print(" - Fahrenheit temperature: ");
-  Serial.println(sensors.getTempFByIndex(0));
+  Serial.println(sensors.getTempF(addrSensor1));
+
+  Serial.print("Sens 2 ");  
+  Serial.print("Celsius temperature: ");
+  // Why "byIndex"? You can have more than one IC on the same bus. 0 refers to the first IC on the wire
+  Serial.print(sensors.getTempC(addrSensor2)); 
+  Serial.print(" - Fahrenheit temperature: ");
+  Serial.println(sensors.getTempF(addrSensor2));
   
-  tempSensor1 = sensors.getTempCByIndex(0);
+  tempSensor1 = sensors.getTempC(addrSensor1);
   if(tempSensor1 > HTemp1) {
-    digitalWrite(MOSFET, HIGH);
+    digitalWrite(MOSFET1, HIGH);
   } else if(tempSensor1 < LTemp1) {
-    digitalWrite(MOSFET, LOW);
+    digitalWrite(MOSFET1, LOW);
+  }
+  
+  tempSensor2 = sensors.getTempC(addrSensor2);
+  if(tempSensor2 > HTemp2) {
+    digitalWrite(MOSFET2, HIGH);
+  } else if(tempSensor1 < LTemp1) {
+    digitalWrite(MOSFET2, LOW);
   }
   
-
   /*
   digitalWrite(MOSFET, HIGH);
   delay(2000);
@@ -73,3 +119,15 @@ void loop() {
 //  }
   
 }
+
+void printAddress(DeviceAddress deviceAddress)
+{ 
+  for (uint8_t i = 0; i < 8; i++)
+  {
+    Serial.print("0x");
+    if (deviceAddress[i] < 0x10) Serial.print("0");
+    Serial.print(deviceAddress[i], HEX);
+    if (i < 7) Serial.print(", ");
+  }
+  Serial.println("");
+}