Sensornode with dht sensor and rest service support

ESP8266/README.md

@@ -0,0 +1 @@
+# Description Sensornode 

ESP8266/sensornode/sensornode.ino

@@ -1,8 +1,8 @@
-// Example testing sketch for various DHT humidity/temperature sensors
-// Written by ladyada, public domain
-
 #include "DHT.h"
+#include <ESP8266WiFi.h>
+#include "aREST.h"
 
+//DHT settings:
 #define DHTPIN 14     // what digital pin we're connected to
 
 // Uncomment whatever type you're using!
@@ -23,11 +23,53 @@
 // as the current DHT reading algorithm adjusts itself to work on faster procs.
 DHT dht(DHTPIN, DHTTYPE);
 
+// Create aREST instance
+aREST rest = aREST();
+
+// WiFi settings:
+const char* ssid = "Signal im Regal";
+const char* password = "42003489";
+
+#define LISTEN_PORT 80
+
+// Create an instance of the server
+WiFiServer server(LISTEN_PORT);
+
+// Variables to be exposed to the API
+float temperature;
+float humidity;
+
 void setup() {
   Serial.begin(115200);
-  Serial.println("DHTxx test!");
+  Serial.println("Sensornode start");
 
+  //dht driver initialization
   dht.begin();
+
+  //Expose variables to the rest api
+  rest.variable("temperature", &temperature);
+  rest.variable("humidity", &humidity);
+
+  // Give name & ID to the device (ID should be 6 characters long)
+  rest.set_id("1");
+  rest.set_name("sensornode");
+
+
+  // Connect to WiFi
+  Serial.println("Connecting to wlan");
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println("\nWiFi connected");
+
+  // Start the server
+  server.begin();
+  Serial.println("Server started");
+
+  // Print the IP address
+  Serial.println(WiFi.localIP());
 }
 
 void loop() {
@@ -39,31 +81,25 @@ void loop() {
   float h = dht.readHumidity();
   // Read temperature as Celsius (the default)
   float t = dht.readTemperature();
-  // Read temperature as Fahrenheit (isFahrenheit = true)
-  float f = dht.readTemperature(true);
   
   // Check if any reads failed and exit early (to try again).
-  if (isnan(h) || isnan(t) || isnan(f)) {
+  if (isnan(h) || isnan(t)) {
     Serial.println("Failed to read from DHT sensor!");
     return;
+  } else {
+    //set the new values
+    humidity = h;
+    temperature = t;
+    
   }
 
-  // Compute heat index in Fahrenheit (the default)
+  // Handle REST calls
-  float hif = dht.computeHeatIndex(f, h);
+  WiFiClient client = server.available();
-  // Compute heat index in Celsius (isFahreheit = false)
+  if (!client) {
-  float hic = dht.computeHeatIndex(t, h, false);
+    return;
-
+  }
-  Serial.print("Humidity: ");
+  while(!client.available()){
-  Serial.print(h);
+    delay(1);
-  Serial.print(" %\t");
+  }
-  Serial.print("Temperature: ");
+  rest.handle(client);
-  Serial.print(t);
-  Serial.print(" *C ");
-  Serial.print(f);
-  Serial.print(" *F\t");
-  Serial.print("Heat index: ");
-  Serial.print(hic);
-  Serial.print(" *C ");
-  Serial.print(hif);
-  Serial.println(" *F");
 }