Paul LangdoncoreycSanmati ChoudharyCurtPrathamesh SatputeCraig Gronlund
Published

Weather Station

Build a better weather station with our entire meetup as a team.

IntermediateWork in progress2,989
Weather Station

Things used in this project

Hardware components

Wemos D1 Mini
Espressif Wemos D1 Mini
×1
DHT11 Temperature & Humidity Sensor (4 pins)
DHT11 Temperature & Humidity Sensor (4 pins)
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

Read more

Code

Weather Station with ThingSpeak

Arduino
#include <DHT.h>
#include <ESP8266WiFi.h>
 
// replace with your channel’s thingspeak API key and your SSID and password


String apiKey = "xxxxxxx";
const char* ssid = "YourSSID";
const char* password = "WiFiPassword";
const char* server = "api.thingspeak.com";

//Define the PIN for the Sensor
#define DHTPIN 2
#define DHTTYPE DHT11 
 
DHT dht(DHTPIN, DHTTYPE,11);
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() 
{
//Read Sensor
float h = dht.readHumidity();
float t = dht.readTemperature();


if (isnan(h) || isnan(t)) 
{
  Serial.println("Failed to read from DHT sensor!");
  Serial.println("Pausing to re-read.");
  delay(1000);
  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(" - Sending 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);
}

Credits

Paul Langdon

Paul Langdon

49 projects • 256 followers
Working as a cloud architect for an IoT hardware company
coreyc

coreyc

7 projects • 16 followers
Sanmati Choudhary

Sanmati Choudhary

6 projects • 9 followers
Junior at Farmington High School
Curt

Curt

5 projects • 7 followers
Prathamesh Satpute

Prathamesh Satpute

2 projects • 4 followers
Craig Gronlund

Craig Gronlund

4 projects • 8 followers

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