MAX6875 Temp Sensor example

libraries/MySensors/examples/MAX6875TemperatureSensor/MAX6875TemperatureSensor.ino

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+// MAX6875 Hight temperature sensor with range: -200 degC - +1300 degC 
+// Contribution by MrLynx
+// http://forum.mysensors.org/topic/641/max6675
+//
+// Connect:
+// MAX6675 - Arduino
+//     CS0 - 4
+//      SO - 3 
+//    SCLK - 5
+//     VCC - 5V
+//     GND - GND
+
+#include <MySensor.h>
+#include <MAX6675.h>
+#include <SPI.h>
+uint8_t CS0 = 4; // CS pin on MAX6675
+uint8_t SO = 3; // SO pin of MAX6675
+uint8_t SCLK = 5; // SCK pin of MAX6675
+uint8_t units = 1; // Units to readout temp (0 = ˚F, 1 = ˚C)
+float temperature = 0.0; // Temperature output variable
+float lastTemperature;
+unsigned long SLEEP_TIME = 30000;
+boolean metric = true;
+MySensor gw;
+
+MyMessage msg(0, V_TEMP);
+
+// Initialize the MAX6675 Library for our chip
+
+MAX6675 temp0(CS0, SO, SCLK, units);
+
+void setup()
+{
+  // Startup and initialize MySensors library. Set callback for incoming messages.
+  gw.begin();
+
+  // Send the sketch version information to the gateway and Controller
+  gw.sendSketchInfo("Max6675 Temp Sensor", "1.0");
+
+  // Present all sensors to controller
+  gw.present(0, S_TEMP);
+}
+
+void loop()
+{
+  // Process incoming messages (like config from server)
+  gw.process();
+
+  temperature = temp0.read_temp(); // Read the temp
+
+  if (temperature < 0) { // If there is an error with the TC, temperature will be < 0
+    Serial.println("Thermocouple Error!!"); // There is a thermocouple error
+  } else {
+    Serial.print("Current Temperature: ");
+    Serial.println( temperature ); // Print the temperature to Serial
+    if (temperature != lastTemperature)
+      gw.send(msg.setSensor(0).set(temperature, 1));
+    lastTemperature = temperature;
+  }
+
+  gw.sleep(SLEEP_TIME);
+}