IOTBasic

IOT Basic Training with Cayenne

Prerequisite

• Internet connected Computer/laptop Installed Arduino IDE Installed
• NodeMCU board manager
• LED, LDR, DHT, Resistor , Jumber Wires , Breadboard
• Mydevice Cayenne account.
• Libraries

1.LDR Serial Monitoring

Components

• NodeMCU
• LDR
• 1K Ohm Resistor
• BreadBoard

Diagram

Code

int ldr = A0;
int ldr_data;

void setup() 
{
    pinMode(ldr,INPUT);
    Serial.begin(9600);
}

void loop()
{
    ldr_data = analogRead(ldr);
    Serial.println(ldr_data);
    delay(100);
 }

2.LDR Sensor Data to Cloud

Components

• NodeMCU
• Cayenne account
• LDR
• 1K Ohm Resistor
• BreadBoard

Diagram

Code

#include <CayenneMQTTESP8266.h>
#include <ESP8266WiFi.h>

char ssid[] = "*****";
char password[] = "****";

char username[] = "****************";
char mqtt_password[] = "***********";
char client_id[] = "***************";

int ldr = A0;
int ldr_data;

void setup()
{

    Cayenne.begin(username,mqtt_password,client_id,ssid,password);

    pinMode(A0,INPUT);
  
}

void loop()
{
    Cayenne.loop();
  
    ldr_data = analogRead(ldr);

    Cayenne.virtualWrite(0, ldr_data);
}

3.Control Servo Motor Using Cayenne

Components

• NodeMCU
• Cayenne account
• Servo
• BreadBoard

Diagram

Code

#include <Servo.h>

#include <CayenneMQTTESP8266.h>
#include <ESP8266WiFi.h>

char ssid[] = "****";
char password[] = "****";

char username[] = "***********************";
char mqtt_password[] = "******************";
char client_id[] = "**********************";

Servo myservo;


void setup()
{
  myservo.attach(D2);

  Cayenne.begin(username,mqtt_password,client_id,ssid,password);
}

void loop()
{
  Cayenne.loop();
   
 }

CAYENNE_IN(1)
{

  myservo.write(getValue.asInt());
}
  

4.Temprature and Humidity Monioring

Components

• NodeMCU
• Cayenne account
• DHT11
• BreadBoard

Diagram

Code

#include <CayenneMQTTESP8266.h>
#include <DHT.h>
#include <ESP8266WiFi.h>


char ssid[] = "*****";
char password[] = "*********";

char username[] = "*****************";
char mqtt_password[] = "*************";
char client_id[] = "*****************";

DHT dht(7,DHT11);

void setup()
{
      Cayenne.begin(username,mqtt_password,client_id,ssid,password);
  
}


void loop()
{
  Cayenne.loop();
  
  float temp = dht.readTemperature(true);
  float hum = dht.readHumidity();

  Cayenne.virtualWrite(1, temp, TYPE_TEMPERATURE , UNIT_FAHRENHEIT);
  Cayenne.virtualWrite(2, hum,  TYPE_RELATIVE_HUMIDITY , UNIT_PERCENT);
   
}