#include <ESP8266WiFi.h>

String apiKey = "NJBTKNWUNQZWZKO9";

const char *ssid = "vivo Y22";

const char *pass = "20050416";

const char* server = "api.thingspeak.com";

int trigPin1 = D5;

const int echoPin1 = D6;

long duration1;

int distance1;

WiFiClient client;

void setup() {

Serial.begin(9600);

Serial.println("Serial Begin");

pinMode(trigPin1, OUTPUT);

pinMode(echoPin1, INPUT);

WiFi.begin(ssid, pass);

Serial.println();

Serial.print("Connecting to ");

Serial.println(ssid);

while (WiFi.status() != WL_CONNECTED)

{

delay(500);

Serial.print(".");

}

Serial.println("");

Serial.println("WiFi connected");

}

void loop() {

digitalWrite(trigPin1, LOW);

delayMicroseconds(2);

digitalWrite(trigPin1, HIGH);

delayMicroseconds(10);

digitalWrite(trigPin1, LOW);

duration1 = pulseIn(echoPin1, HIGH) ;

distance1= duration1*0.034/2;

Serial.println("ultra1 =" + String(distance1) + " cm");

int totaldistnace1 =12;

totaldistnace1=totaldistnace1-distance1;

if (client.connect(server, 80))

{

String postStr = apiKey;

postStr += "&field1=";

postStr += String(totaldistnace1);

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("distance1: ");

Serial.print(totaldistnace1);

Serial.print(" ");

}

client.stop();

delay(1000);

}