haris project 1

#include <ESP8266WiFi.h>

#include <PubSubClient.h>

 

const char *ssid =  "********";   // cannot be longer than 32 characters!

const char *pass =  "********";   //

int buttonState = 0;

String flag;

 

// device details

char *deviceId = "device-*******************************";

char *deviceUsername = "*******************************";

char *devicePassword = "*******************************";

String deviceCredential = String(deviceUsername) + ":" + String(devicePassword);

 

WiFiClient wclient;

PubSubClient client(wclient, (String) "geeknesia.com", 1883);

 

void senddata(char* topic, String credential, char *var1, String nilai1 ) {

  String pubString  = "{\"code\":\"";

 pubString += credential;

 pubString += "\",";

 pubString += "\"attributes\":{\"";

 pubString += String(var1) + "\":\"" + nilai1 + "\"";

 pubString += "}}";

 char message_buff[pubString.length() + 1];

 pubString.toCharArray(message_buff, pubString.length() + 1);

 client.publish("iot/data", pubString);

}

 

void setup() {

 Serial.begin(115200);

  pinMode(2, OUTPUT);     // Initialize the BUILTIN_LED pin as an output

 pinMode(12, INPUT_PULLUP);

}

 

// the loop function runs over and over again forever

void loop() {

 if (WiFi.status() != WL_CONNECTED) {

 WiFi.begin(ssid, pass);

 

 if (WiFi.waitForConnectResult() != WL_CONNECTED)

 return;

 Serial.println("WiFi connected");

 }

 

 if (WiFi.status() == WL_CONNECTED) {

 if (!client.connected()) {

 if (client.connect(deviceId, "iot/will", 0, 0, deviceId)) {

 }

 }

 

 if (client.connected())

 client.loop();

 }

 

 

 buttonState = digitalRead(12);

 if (buttonState == 1) {

 digitalWrite(2, LOW);

 flag = "OFF";

 }

 else {

 // turn LED off:

 digitalWrite(2, HIGH);

 flag = "ON";

 }

 senddata(deviceId, deviceCredential, "Lamp", flag);

 delay(5000);

}