Code error in smart irrigation system, using dht11 sensor - arduino

Question

I have wrtitten a code for automatically watering plant using esp8266, dht11, moisture sensor but my code has some error, i dont know how to fix it
#include <DHT.h>
#include <ESP8266WiFi.h>
String apiKey = "X5AQ3EGIKMBYW31H"; // Enter your Write API key here
const char* server = "api.thingspeak.com";
const char *ssid = "CircuitLoop"; // Enter your WiFi Name
const char *pass = "circuitdigest101"; // Enter your WiFi Password
#define DHTPIN D3 // GPIO Pin where the dht11 is connected
DHT dht(DHTPIN, DHT11);
WiFiClient client;
const int moisturePin = A0; // moisteure sensor pin
const int motorPin = D0;
unsigned long interval = 10000;
unsigned long previousMillis = 0;
unsigned long interval1 = 1000;
unsigned long previousMillis1 = 0;
float moisturePercentage; //moisture reading
float h; // humidity reading
float t; //temperature reading
void setup()
{
Serial.begin(115200);
delay(10);
pinMode(motorPin, OUTPUT);
digitalWrite(motorPin, LOW); // keep motor off initally
dht.begin();
Serial.println("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, pass);
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
Serial.print("."); // print ... till not connected
}
Serial.println("");
Serial.println("WiFi connected");
}
void loop()
{
unsigned long currentMillis = millis(); // grab current time
h = dht.readHumidity(); // read humiduty
t = dht.readTemperature(); // read temperature
if (isnan(h) || isnan(t))
{
Serial.println("Failed to read from DHT sensor!");
return;
}
moisturePercentage = ( 100.00 - ( (analogRead(moisturePin) / 1023.00) * 100.00 ) );
if ((unsigned long)(currentMillis - previousMillis1) >= interval1) {
Serial.print("Soil Moisture is = ");
Serial.print(moisturePercentage);
Serial.println("%");
previousMillis1 = millis();
}
if (moisturePercentage < 50) {
digitalWrite(motorPin, HIGH); // tun on motor
}
if (moisturePercentage > 50 && moisturePercentage < 55) {
digitalWrite(motorPin, HIGH); //turn on motor pump
}
if (moisturePercentage > 56) {
digitalWrite(motorPin, LOW); // turn off mottor
}
if ((unsigned long)(currentMillis - previousMillis) >= interval) {
sendThingspeak(); //send data to thing speak
previousMillis = millis();
client.stop();
}
}
void sendThingspeak() {
if (client.connect(server, 80))
{
String postStr = apiKey; // add api key in the postStr string
postStr += "&field1=";
postStr += String(moisturePercentage); // add mositure readin
postStr += "&field2=";
postStr += String(t); // add tempr readin
postStr += "&field3=";
postStr += String(h); // add humidity readin
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()); //send lenght of the string
client.print("\n\n");
client.print(postStr); // send complete string
Serial.print("Moisture Percentage: ");
Serial.print(moisturePercentage);
Serial.print("%. Temperature: ");
Serial.print(t);
Serial.print(" C, Humidity: ");
Serial.print(h);
Serial.println("%. Sent to Thingspeak.");
}
}
This is the error which i get
Arduino: 1.8.9 (Windows 8.1), Board: "Generic ESP8266 Module, 80 MHz, Flash, Disabled, All SSL ciphers (most compatible), ck, 26 MHz, 40MHz, DOUT (compatible), 512K (no SPIFFS), 2, nonos-sdk 2.2.1 (legacy), v2 Lower Memory, Disabled, None, Only Sketch, 115200"
sketch_oct03a:7:16: error: 'D3' was not declared in this scope
#define DHTPIN D3 // GPIO Pin where the dht11 is connected
^
C:\Users\Shweta\Desktop\Libraries\sketch_oct03a\sketch_oct03a.ino:8:9: note: in expansion of macro 'DHTPIN'
DHT dht(DHTPIN, DHT11);
^
sketch_oct03a:12:22: error: 'D0' was not declared in this scope
const int motorPin = D0;
^
exit status 1
'D3' was not declared in this scope
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Answer 1

Digital pins are not prefixed with D, unlike their analog counterparts.
#define DHTPIN 3
const int motorPin = 0;