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---

//PINS
#define REEDSWITCH 13
#define WHEELSIZE 0.91
 
volatile unsigned long rotations = 0;
float meter = 0.0;
volatile unsigned long lastactive = 0;
 
// Debounce Vars
volatile unsigned long last_micros;
unsigned long debouncing_time = 500;              //Debouncing Time in Milliseconds
 
void setup()
{
  // Reed Sensor (Interrupt) 
  attachInterrupt(digitalPinToInterrupt(REEDSWITCH), debounceInterrupt, FALLING);
  //PINS
  pinMode(REEDSWITCH, INPUT);
  lastactive = millis();
}
 
void loop()
{ 
  if ( rotations >= 1 && ((millis() - lastactive) >= 1500) ) {
    meter = rotations * WHEELSIZE; 
    // rotations = 0;                      
    // meter = 0;
  }
}
 
// ----- Helper Functions 
void debounceInterrupt() {
  if ( micros() < last_micros ) {
    last_micros = micros();
  }
  if ((unsigned long)(micros() - last_micros) >= debouncing_time * 1000) {
    rotations++;
    last_micros = micros(); 
    lastactive = millis();
  }
}
  </pre>

</p>

</main>

<main role=“main” class=“container”>

<h2 id="dht22" class="mt-3">DHT22</h2>
<p> <code><pre>

#include “DHTesp.h”

DHTesp dht;

void setup() {

Serial.begin(115200);
Serial.println();
Serial.println("Status\tHumidity (%)\tTemperature (C)\t(F)\tHeatIndex (C)\t(F)");

dht.setup(12); // data pin 2

}

void loop() {

delay(dht.getMinimumSamplingPeriod());

float humidity = dht.getHumidity();
float temperature = dht.getTemperature();

Serial.print(dht.getStatusString());
Serial.print("\t");
Serial.print(humidity, 1);
Serial.print("\t\t");
Serial.print(temperature, 1);
Serial.print("\t\t");
Serial.print(dht.toFahrenheit(temperature), 1);
Serial.print("\t\t");
Serial.print(dht.computeHeatIndex(temperature, humidity, false), 1);
Serial.print("\t\t");
Serial.println(dht.computeHeatIndex(dht.toFahrenheit(temperature), humidity, true), 1);

}

</pre></code></p>

</main>

<main role=“main” class=“container”>

<h2 id="webserver" class="mt-3">Webserver</h2>
<p> <code><pre>

#include < ESP8266WiFi.h> #include < WiFiClient.h> #include < ESP8266WebServer.h>

Replace with your network credentials const char* ssid = “Your WiFI SSID”; const char* password = “Your WiFI Password”; ESP8266WebServer server(80); instantiate server at port 80 (http port)

String page = “”;

void setup(void){

delay(1000);

Serial.begin(115200);
WiFi.begin(ssid, password); //begin WiFi connection
Serial.println("");

// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
  delay(500);
  Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
server.on("/", [](){
  page = "ESP8266 Webserver - hello world!";
  server.send(200, "text/html", page);
});

server.begin();
Serial.println("Web server started!");

}

void loop(void){

server.handleClient();

} </code>