WeMOS: DHT11 - sensor suhu dan humidity

Sumber: http://www.esp8266learning.com/dht11-sensor-data-to-thingspeak-using-a-wemos-d1.php

Code

#include <DHT.h>
#include <ESP8266WiFi.h>
 
// replace with your channel’s thingspeak API key and  your SSID and password
String apiKey = "0C2X0PGNFHOEGYZA1";
const char* ssid = "ssid";
const char* password = "password";
const char* server = "api.thingspeak.com";
 
#define DHTPIN D7
#define DHTTYPE DHT11 
 
DHT dht(DHTPIN, DHTTYPE);
WiFiClient client;
 
void setup() 
{
  Serial.begin(115200);
  delay(10);
  dht.begin();
  
  WiFi.begin(ssid, password);
  
  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");
}
 
void loop() 
{
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  if (isnan(h) || isnan(t)) 
  { 
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
 
  if (client.connect(server,80)) {
    String postStr = apiKey;
    postStr +="&field1=";
    postStr += String(t);
    postStr +="&field2=";
    postStr += String(h);
    postStr += "\r\n\r\n";  

  client.print("POST /update HTTP/1.1\n");
  client.print("Host: api.thingspeak.com\n");
  client.print("Connection: close\n");
  client.print("X-THINGSPEAKAPIKEY: "+apiKey+"\n");
  client.print("Content-Type: application/x-www-form- urlencoded\n");
  client.print("Content-Length: ");
  client.print(postStr.length());
  client.print("\n\n");
  client.print(postStr); 

  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.print(" degrees Celsius Humidity: ");
  Serial.print(h);
  Serial.println("\nSending data to Thingspeak");
  }
  client.stop();

  Serial.println("Waiting 20 secs");
  // thingspeak needs at least a 15 sec delay between updates
  // 20 seconds to be safe
  delay(20000);
}

Referensi

• http://www.esp8266learning.com/dht11-sensor-data-to-thingspeak-using-a-wemos-d1.php

Pranala Menarik

• WeMOS