Month: June 2021

Pavane (Fauré) – Wikipedia

Jovan Stosic June 22, 2021

The Pavane in F-sharp minor, Op. 50, is a short work by the French composer Gabriel Fauré written in 1887. It was originally a piano piece, but is better known in Fauré’s version for orchestra and optional chorus. It was first performed in Paris in 1888, becoming one of the composer’s most popular works.

Source: Pavane (Fauré) – Wikipedia

Pavane (Fauré) – Wikipedia was last modified: June 22nd, 2021 by Jovan Stosic

Arduino-Sample-Codes/Sim7600_MQTT.ino

Jovan Stosic June 19, 2021

/*
Developed by Nandu, Anandu, Unnikrishnan
Company: Elementz Engineers Guild Pvt Ltd
*/
#include<SoftwareSerial.h>
SoftwareSerial mySerial(3,2);
#define sw 5
#define led 7
int flag = 1;
int flag1 = 0;
int state=0;
String Publish = “led/publish“; //Publish Topic
String Subscribe = “led/subscribe“; //Subscribe Topic
void setup()
{
Serial.begin(9600);
mySerial.begin(9600);
pinMode(sw, INPUT_PULLUP);
pinMode(led, OUTPUT);
digitalWrite(led, LOW);
//AT Commands for setting up the client id and Server
//Need to be executed once — Open serial terminal doe seeing the debug messages
Serial.println(“Connecting To Server……..“);
mySerial.println(“ATE0“);
delay(2000);
mySerial.println(“AT+CMQTTSTART“); //Establishing MQTT Connection
delay(2000);
mySerial.println(“AT+CMQTTACCQ=0,\”elementz/123\”“); //Client ID – change this for each client as this need to be unique
delay(2000);
mySerial.println(“AT+CMQTTCONNECT=0,\”tcp://test.mosquitto.org:1883\”,90,1“); //MQTT Server Name for connecting this client
delay(2000);
//SUBSCRIBE MESSAGE
//Need to be executed once
mySerial.println(“AT+CMQTTSUBTOPIC=0,9,1“); //AT Command for Setting up the Subscribe Topic Name
delay(2000);
mySerial.println(Subscribe); //Topic Name
delay(2000);
mySerial.println(“AT+CMQTTSUB=0,4,1,1“); //Length of message
delay(2000);
mySerial.println(“HAII“); //message
delay(2000);
Serial.println(“Done“);
}
void loop()
{
String a;
if(state==0)
{
if(digitalRead(sw) == 0 && flag1 == 0)
{
//PUBLISH MESSAGE
flag1 = 1;
digitalWrite(led, HIGH);
Serial.println(“Publishing Message: LED ON“);
mySerial.println(“AT+CMQTTTOPIC=0,8“); //AT Command for Setting up the Publish Topic Name
delay(1000);
mySerial.println(Publish); //Topic Name
delay(1000);
mySerial.println(“AT+CMQTTPAYLOAD=0,1“); //Payload length
delay(1000);
mySerial.println(“a“); //Payload message
delay(1000);
mySerial.println(“AT+CMQTTPUB=0,1,60“); //Acknowledgment
delay(1000);
}
else if(digitalRead(sw) == 0 && flag1 == 1)
{
flag1 = 0;
digitalWrite(led, LOW);
Serial.println(“Publishing Message: LED OFF“);
mySerial.println(“AT+CMQTTTOPIC=0,8“); //AT Command for Setting up the Publish Topic Name
delay(1000);
mySerial.println(Publish); //Topic Name
delay(1000);
mySerial.println(“AT+CMQTTPAYLOAD=0,1“); //Payload length
delay(1000);
mySerial.println(“b“); //Payload message
delay(1000);
mySerial.println(“AT+CMQTTPUB=0,1,60“); //Acknowledgment
delay(1000);
}
}
if(state==1)
{
if(digitalRead(sw) == 0 && flag1 == 0)
{
//PUBLISH MESSAGE
flag1 = 1;
digitalWrite(led, LOW);
Serial.println(“Publishing Message: LED OFF“);
mySerial.println(“AT+CMQTTTOPIC=0,8“); //AT Command for Setting up the Publish Topic Name
delay(1000);
mySerial.println(Publish); //Topic Name
delay(1000);
mySerial.println(“AT+CMQTTPAYLOAD=0,1“); //Payload length
delay(1000);
mySerial.println(“b“); //Payload message
delay(1000);
mySerial.println(“AT+CMQTTPUB=0,1,60“); //Acknowledgment
delay(1000);
}
else if(digitalRead(sw) == 0 && flag1 == 1)
{
flag1 = 0;
digitalWrite(led,HIGH);
Serial.println(“Publishing Message: LED ON“);
mySerial.println(“AT+CMQTTTOPIC=0,8“); //AT Command for Setting up the Publish Topic Name
delay(1000);
mySerial.println(Publish); //Topic Name
delay(1000);
mySerial.println(“AT+CMQTTPAYLOAD=0,1“); //Payload length
delay(1000);
mySerial.println(“a“); //Payload message
delay(1000);
mySerial.println(“AT+CMQTTPUB=0,1,60“); //Acknowledgment
delay(1000);
}
}
//Receiving MODEM Response
while(mySerial.available()>0)
{
delay(10);
a = mySerial.readString();
if(flag==0)
{
//Serial.println(a);
flag = 1;
}
//Serial.println(b);
if(a.indexOf(“PAYLOAD“) != –1)
{
flag = 0;
int new1 = a.indexOf(“PAYLOAD“);
String neww = a.substring(new1);
int new2 = neww.indexOf(‘\n‘);
String new3 = neww.substring(new2+1);
int new4 = new3.indexOf(‘\n‘);
String new5 = new3.substring(0,new4);
Serial.println(“Topic: led/subscribe“);
Serial.print(“Message is: “);
Serial.println(new5);
new5.remove(new5.length()-1);
if(new5 == “a“)
{
state=1;
Serial.println(“LED ON“);
digitalWrite(led, HIGH);
}
else if(new5 == “b“)
{
state=0;
flag1=0;
Serial.println(“LED OFF“);
digitalWrite(led, LOW);
}
}
}
}

 

Source: Arduino-Sample-Codes/Sim7600_MQTT.ino at master · elementzonline/Arduino-Sample-Codes · GitHub

Arduino-Sample-Codes/Sim7600_MQTT.ino was last modified: June 19th, 2021 by Jovan Stosic