Added contrib files

contrib/samples/samples/arduino/esp8266/dht11/dht.c

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+// Datalogging ESP8266 -12 sketch 
+
+#include "DHT.h"
+#include <ESP8266WiFi.h>
+
+#define DHTPIN1 13    // Sensor 1
+#define DHTPIN2 12    // Sensor 2
+#define DHTPIN3 2     // Sensor 3
+#define DHTPIN4 16    // Sensor 4
+
+// Type of DHT sensor
+//#define DHTTYPE DHT11   // DHT 11
+#define DHTTYPE DHT22   // DHT 22  (AM2302)
+//#define DHTTYPE DHT21   // DHT 21 (AM2301)
+
+// Connect pin 1 (on the left) of the sensor to +5V
+// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
+// to 3.3V instead of 5V!
+// Connect pin 2 of the sensor to whatever your DHTPIN is
+// Connect pin 4 (on the right) of the sensor to GROUND
+// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
+
+// Initialize DHT sensor.
+// Note that older versions of this library took an optional third parameter to
+// tweak the timings for faster processors.  This parameter is no longer needed
+// as the current DHT reading algorithm adjusts itself to work on faster procs.
+//
+// DAT: 15 needed as were running on ESP8266 and 3.3v auto seems to screw up
+DHT dht1(DHTPIN1, DHTTYPE, 15);
+DHT dht2(DHTPIN2, DHTTYPE, 15);
+DHT dht3(DHTPIN3, DHTTYPE, 15);
+DHT dht4(DHTPIN4, DHTTYPE, 15);
+
+const char* ssid     = "Attic";
+const char* password = "wanderonintotexel";
+
+const char* host = "10.0.0.30";
+const char* port = "1010";
+
+
+void setup() {
+  // Init Serial for when we are bench testing.
+  Serial.begin(115200);
+  Serial.println("Hay temperatures!");
+
+  // Set all required pins to input just in case
+  pinMode(DHTPIN1, INPUT_PULLUP);
+  pinMode(DHTPIN2, INPUT_PULLUP);
+  pinMode(DHTPIN3, INPUT_PULLUP);
+  pinMode(DHTPIN4, INPUT_PULLUP);
+
+  connectToWifi();
+
+  // Initialise all dht sensors
+  dht1.begin();
+  dht2.begin();
+  dht3.begin();
+  dht4.begin();
+}
+
+void loop() {
+  // Reading temperature or humidity takes about 250 milliseconds!
+  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
+
+  // Read temperature as Celsius (the default)
+  float h1 = dht1.readHumidity();
+  float t1 = dht1.readTemperature();
+  delay(200);
+  float h2 = dht2.readHumidity();
+  float t2 = dht2.readTemperature();
+  delay(200);
+  float h3 = dht3.readHumidity();
+  float t3 = dht3.readTemperature();
+  delay(200);
+  float h4 = dht4.readHumidity();
+  float t4 = dht4.readTemperature();
+
+  // Check if any reads failed and exit early (to try again).
+  // DAT: Removed as we want to transmit "nan" if we have a problem, 
+  // let the webserver sort it out
+  //  if (isnan(h1) || isnan(t1) ) {
+  //    Serial.println("Failed to read from DHT sensor!");
+  //    return;
+  //  }
+
+  // Debug temps to serial
+  printTemp(h1, t1);
+  printTemp(h2, t2);
+  printTemp(h3, t3);
+  printTemp(h4, t4);
+
+  Serial.println(WiFi.localIP());
+  Serial.println("------");
+
+  sendToServer(t1, h1, t2, h2, t3, h3, t4, h4);
+
+  // Wait ten minutes between measurements.
+  delay(600000);
+}
+
+void printTemp(float h, float t) {
+  Serial.print("Humidity: ");
+  Serial.print(h);
+  Serial.print(" %\t");
+  Serial.print("Temperature: ");
+  Serial.print(t);
+  Serial.print(" *C ");
+  Serial.println("");
+}
+
+void connectToWifi() {
+  Serial.println();
+  Serial.println();
+  Serial.print("Connecting to ");
+  Serial.println(ssid);
+
+  WiFi.begin(ssid, password);
+
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  Serial.println("");
+  Serial.println("WiFi connected");  
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
+void sendToServer(
+  float t1, float h1, 
+  float t2, float h2, 
+  float t3, float h3, 
+  float t4, float h4) {
+    Serial.print("connecting to ");
+    Serial.println(host);
+
+    // Use WiFiClient class to create TCP connections
+    WiFiClient client;
+    const int httpPort = 1010;
+    if (!client.connect(host, httpPort)) {
+      Serial.println("connection failed");
+      return;
+    }
+
+    // We now create a URI for the request
+    String url = "/gpio/hay";
+    url += "?t1=";
+    url += t1;
+    url += "&h1=";
+    url += h1;
+
+    url += "&t2=";
+    url += t2;
+    url += "&h2=";
+    url += h2;
+
+    url += "&t3=";
+    url += t3;
+    url += "&h3=";
+    url += h3;
+
+    url += "&t4=";
+    url += t4;
+    url += "&h4=";
+    url += h4;
+
+
+    Serial.print("Requesting URL: ");
+    Serial.println(url);
+
+    // This will send the request to the server
+    client.print(String("GET ") + url + " HTTP/1.1\r\n" +
+                 "Host: " + host + "\r\n" + 
+                 "Connection: close\r\n\r\n");
+    delay(10);
+
+    // Read all the lines of the reply from server and print them to Serial
+    while(client.available()){
+      String line = client.readStringUntil('\r');
+      Serial.print(line);
+    }
+
+    Serial.println();
+    Serial.println("closing connection");
+}