ESP8266 Plant Grower

/*
 *  This sketch sends a message to a TCP server
 *
 */
//put your wifi network name here
#define SSID "ssid"
//put your wifi password here
#define PASS "pass"
#define API_KEY "API key here"
#define DHTPIN 13
#define DHTTYPE DHT11
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include "DHT.h"

ESP8266WiFiMulti WiFiMulti;
DHT dht(DHTPIN,DHTTYPE);

void setup() {
  pinMode(12,OUTPUT);
  digitalWrite(12,true);
    Serial.begin(115200);
    delay(10);
    dht.begin();

    // We start by connecting to a WiFi network
    WiFiMulti.addAP(SSID, PASS);

    Serial.println();
    Serial.println();
    Serial.print("Wait for WiFi... ");

    while(WiFiMulti.run() != WL_CONNECTED) {
        Serial.print(".");
        delay(500);
    }

    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());

    delay(500);
}


void loop() {
    const uint16_t port = 80;
    const char * host = "api.thingspeak.com"; // ip or dns

    float h = dht.readHumidity();
    delay(200);
  // Read temperature as Celsius (the default)
  float f = dht.readTemperature(true);
  Serial.println(h);
  Serial.println(f);
    
    Serial.print("connecting to ");
    Serial.println(host);

    // Use WiFiClient class to create TCP connections
    WiFiClient client;

    if (!client.connect(host, port)) {
        Serial.println("connection failed");
        Serial.println("wait 5 sec...");
        delay(5000);
        return;
    }

    // This will send the request to the server
    String cmd1 = "GET /update?key=";
    cmd1 += API_KEY;
    cmd1+= "&field1=";
    cmd1 += String((int)f);
    cmd1 += "&field2=";
    cmd1 += String((int)h);
    cmd1 += "\r\n";
    client.print(cmd1);
    //debugging
    Serial.println(cmd1);

    //read back one line from server
    String line = client.readStringUntil('\r');
    client.println(line);

    Serial.println("closing connection");
    client.stop();
    digitalWrite(12,false);
    Serial.println("wait 10 hrs...");
    delay(1000*60*60*10);
    digitalWrite(12,true);
    //wait 14 hours off
    delay(1000*60*60*14);
}