Merge pull request #24 from cribbstechnologies/master

Add Heat Index to JSON payload

bruh_mqtt_multisensor_github/bruh_mqtt_multisensor_github.ino

@@ -351,6 +351,7 @@ void sendState() {
   root["motion"] = (String)motionStatus;
   root["ldr"] = (String)LDR;
   root["temperature"] = (String)tempValue;
+  root["heatIndex"] = (String)calculateHeatIndex(humValue, tempValue);
 
 
   char buffer[root.measureLength() + 1];
@@ -361,6 +362,31 @@ void sendState() {
 }
 
 
+/*
+ * Calculate Heat Index value AKA "Real Feel"
+ * NOAA heat index calculations taken from
+ * http://www.wpc.ncep.noaa.gov/html/heatindex_equation.shtml
+ */
+float calculateHeatIndex(float humidity, float temp) {
+  float heatIndex= 0;
+  if (temp >= 80) {
+    heatIndex = -42.379 + 2.04901523*temp + 10.14333127*humidity;
+    heatIndex = heatIndex - .22475541*temp*humidity - .00683783*temp*temp;
+    heatIndex = heatIndex - .05481717*humidity*humidity + .00122874*temp*temp*humidity;
+    heatIndex = heatIndex + .00085282*temp*humidity*humidity - .00000199*temp*temp*humidity*humidity;
+  } else {
+     heatIndex = 0.5 * (temp + 61.0 + ((temp - 68.0)*1.2) + (humidity * 0.094));
+  }
+
+  if (humidity < 13 && 80 <= temp <= 112) {
+     float adjustment = ((13-humidity)/4) * sqrt((17-abs(temp-95.))/17);
+     heatIndex = heatIndex - adjustment;
+  }
+
+  return heatIndex;
+}
+
+
 /********************************** START SET COLOR *****************************************/
 void setColor(int inR, int inG, int inB) {
   analogWrite(redPin, inR);

example_home_assistant_configuration.yaml

@@ -42,6 +42,12 @@ sensor:
     name: "SN1 Temperature"  
     unit_of_measurement: "°F"  
     value_template: '{{ value_json.temperature | round(1) }}'  
+
+ - platform: mqtt
+    state_topic: "bruh/sensornode1"
+    name: "SN1 Real Feel"
+    unit_of_measurement: "°F"
+    value_template: '{{ value_json.heatIndex | round(1) }}'
 
 
 group: