initial commit

homie-ds18b20.ino

@@ -0,0 +1,61 @@
+#include <Homie.h>
+#include <OneWire.h>
+#include <DallasTemperature.h>
+
+#define ONE_WIRE_BUS 2
+
+const int READ_INTERVAL = 10000;
+unsigned long lastReadingSent = 0;
+
+OneWire oneWire(ONE_WIRE_BUS);
+DallasTemperature sensors(&oneWire);
+
+int millisToWait = sensors.millisToWaitForConversion(12);
+bool waitingForConversion = false;
+unsigned long millisAtStartConversion = 0;
+
+HomieNode temperatureNode("temperature", "Temperature", "temperature");
+
+
+void loopHandler() {
+  
+  if (millis() - lastReadingSent >= READ_INTERVAL) {
+    if (waitingForConversion == false) {
+      sensors.requestTemperatures();
+      waitingForConversion = true;
+      millisAtStartConversion = millis();
+    }
+
+    if ((waitingForConversion == true) && (millis() - millisAtStartConversion >= millisToWait)) {
+
+      float temperature = sensors.getTempCByIndex(0);
+      
+      Homie.getLogger() << "Temperature: " << temperature << " °C" << endl;
+      temperatureNode.setProperty("temperature").send(String(temperature));
+
+      waitingForConversion = false;
+      lastReadingSent = millis();
+    }
+  }
+}
+
+void setup() {
+  Serial.begin(115200);
+  Serial << endl << endl;
+  Homie_setFirmware("awesome-ds18b20", "1.0.0");
+  Homie.setLoopFunction(loopHandler);
+
+  temperatureNode.advertise("temperature").setName("Temperature")
+                                      .setDatatype("float")
+                                      .setUnit("ºC");
+  
+  sensors.begin();
+  sensors.setResolution(12);  
+  sensors.setWaitForConversion(false);                 
+  Homie.setup();
+ 
+}
+
+void loop() {
+  Homie.loop();
+}