// TECHATRONIC.COM
// library
// https://github.com/adafruit/DHT-sensor-library
// https://github.com/manrueda/ESP8266HttpClient
// https://github.com/ekstrand/ESP8266wifi
#include <WiFi.h>
#include <HTTPClient.h>
String thingSpeakAddress= "http://api.thingspeak.com/update?";
String writeAPIKey;
String tsfield1Name;
String request_string,request_string1;
HTTPClient http;
#include <Adafruit_Sensor.h>
#include <DHT.h> // Including library for dht
// library
// https://github.com/adafruit/DHT-sensor-library
#include <WiFi.h>
String apiKey = "77921LPMGM2OAGQE";   // Enter your Write API key from ThingSpeak
const char *ssid = "DESKTOP";     // replace with your wifi ssid and wpa2 key
const char *pass = "asdfghjkl";    // WIFI Password
const char* server = "api.thingspeak.com";
#define DHTPIN 0     //pin D3 where the dht11 is connected
DHT dht(DHTPIN, DHT22);
WiFiClient client;
void setup()
{  dht.begin();
Serial.begin(115200);
delay(3000);
WiFi.disconnect();
Serial.println("START");
WiFi.begin("DESKTOP","asdfghjkl");
while ((!(WiFi.status() == WL_CONNECTED))){
delay(300);
Serial.println("...");
}
Serial.println("I AM CONNECTED");
}
void loop()
{
if (client.connect("api.thingspeak.com",80))
{
request_string = thingSpeakAddress;
request_string += "key=";
request_string += "77921LPMGM2OAGQE";
request_string += "&";
request_string += "field3";
request_string += "=";
request_string += analogRead(34);
http.begin(request_string);
http.GET();
http.end();
}
delay(10);
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))  //  "184.106.153.149" or api.thingspeak.com
{
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 Celcius, Humidity: ");
Serial.print(h);
Serial.print(" Soil Sensor ");
Serial.print(A0);
Serial.println("%. Send to Thingspeak.");
}
client.stop();
Serial.println("Waiting...");
// thingspeak needs minimum 15 sec delay between updates
delay(10);
}