Accessing VFD through MODBUS and updating clouds Via MQTT GPRS

Accessing VFD through MODBUS and updating clouds Via MQTT GPRS

   Functional Block Diagram

   Step 1 Make the connection as shown in the above diagram

   Step 2 copy the code and change the required parameter.

  Step 3 Execute code  

  Step 4  watch the expected result at Cloud MQTT server.

     Test Setup 

Accessing VFD through MODBUS and updating clouds  Via MQTT GPRS code for your reference 

#include <IndinoDI.h>  // Indino Library 

/*     Cloud initialisation      */

char data1[20];

char* host = "m16.cloudmqtt.com";

//char* host = "52.3.184.147";

char* port = "16997";

char* username = "eoszmzsz";

char* password = "at1yeUD1pERj";

char* topic = "VFD";

char *APN = "www"; //bsnl

/*    Modbus initialisation       */

uint8_t funCode = 0x04; //Read holding register

uint8_t slave_id = 1; //Set the slave id

uint16_t start_addr = 16130; //Address to read frequency of the VFD    

uint16_t len = 2; //Datatype is 32-bit Float for MFR 2810

uint16_t data[2] = {0};

uint8_t freq_hex_bytes[4] = {0};

float frequency = 0;

uint32_t VALUE;

void setup()

{

Serial.begin(9600);

Serial3.begin(9600);

Indino_Modbus_Master_Init(); //Modbus initialisation

delay(2000);

pinMode(41, OUTPUT);

delay(2000);

Serial.println("Start..");

power_on(APN); //Switch on the modem

delay(1000);

}

/* Main Loop */

void loop()

{

start_addr=start_addr-1;

Indino_Modbus_Master_Read_Raw(funCode, slave_id, start_addr, len, data); //Modbus reading

Serial.print(data[0]);

Serial.println(" Hz");

sprintf(data1,"Frequency=%iHz",data[0]);

Indino_GPRS_Upload_MQTT(data1, APN, host, port, username, password, topic); //Uploading data to cloud using MQTT

delay(3000); // Delay

}

For more details visit https://rdltech.in/indino-4-0/f/accessing-vfd-through-modbus-and-updating-clouds-via-mqtt-gprs

Modbus Energy Meter Reading using GPRS MQTT Protocol - Indino 4.0

Energy meters with an integrated Serial RS485 Modbus interface allow direct reading of all relevant data, such as energy , current and voltage , frequency and form factor for every phase and active and reactive power for every phase and for the three phases

step 1- Select the required parameter and register address of the modbus energy Meter as shown in the below given image .

Step 2- Copy the code and change the required parameter 

Step 3 - Execute the code 

Step 4 Watch the expected result at cloud MQQT Server

Test Setup

/*

* The example file shows making a phone call

*  

* Pin Connection :  

*  

*/

#include <IndinoDI.h>  

String data1;

/*    Cloud initialisation         */

char* host = "m16.cloudmqtt.com";

//char* host = "52.3.184.147";

char* port = "16997";

char* username = "eoszmzsz";

char* password = "at1yeUD1pERj";

char* topic = "meter";

char *APN = "INTERNET"; //Vodafone

uint8_t funCode = 0x04; //Read holding register

uint8_t slave_id = 1;

uint16_t start_addr = 3854; //Address to read frequency=3854

uint16_t start_addr1 = 3850; //Line to Neutral Voltage=3850

uint16_t start_addr2 = 3846; //Avg PF=3846

uint16_t len = 2; //Datatype is 32-bit Float for MFR 2810

uint16_t data[2] = {0};

uint8_t freq_hex_bytes[4] = {0};

float frequency = 0;

float voltage = 0;

float power = 0;

uint32_t VALUE;

char data2[80];

void setup()

{

Serial.begin(9600);

Serial3.begin(9600);

Indino_Modbus_Master_Init();

delay(2000);

pinMode(41, OUTPUT);

delay(2000);

Serial.println("Start..");

power_on(APN);

delay(1000);

}

void loop()

{

Indino_Modbus_Master_Read_Raw(funCode, slave_id, start_addr, len, data);

/*     place register values in byte array, lsb in position 0      */

freq_hex_bytes[3] = (data[1] & 0xFF00) >> 8;  

freq_hex_bytes[2] = (data[1] & 0x00FF);

freq_hex_bytes[1] = (data[0] & 0xFF00) >> 8;  

freq_hex_bytes[0] = (data[0] & 0x00FF);

/*    Convert to Float         */

memcpy(&frequency, freq_hex_bytes , 4);

Serial.print("Frequency =");

Serial.print(frequency,2);

Serial.println(" Hz");

delay(300);

Indino_Modbus_Master_Read_Raw(funCode, slave_id, start_addr1, len, data);

/*    place register values in byte array, lsb in position 0        */

freq_hex_bytes[3] = (data[1] & 0xFF00) >> 8;  

freq_hex_bytes[2] = (data[1] & 0x00FF);

freq_hex_bytes[1] = (data[0] & 0xFF00) >> 8;  

freq_hex_bytes[0] = (data[0] & 0x00FF);

/*      Convert to Float          */

memcpy(&voltage, freq_hex_bytes , 4);

Serial.print("Line to Neutral Voltage =");

Serial.print(voltage,2);

Serial.println(" volts");

delay(300);

Indino_Modbus_Master_Read_Raw(funCode, slave_id, start_addr2, len, data);

/*     place register values in byte array, lsb in position 0      */

freq_hex_bytes[3] = (data[1] & 0xFF00) >> 8;  

freq_hex_bytes[2] = (data[1] & 0x00FF);

freq_hex_bytes[1] = (data[0] & 0xFF00) >> 8;  

freq_hex_bytes[0] = (data[0] & 0x00FF);

/*     Convert to Float         */

memcpy(&power, freq_hex_bytes , 4);

Serial.print("Power factor =");

Serial.print(power,2);

Serial.println(" PF");

data1 ="Frequency=";

data1 +=frequency;

data1 +=",Voltage=";

data1 +=voltage;

data1 +=",Powerfactor=";

data1 +=power;

for(int i=0;i<data1.length();i++)

data2[i]=data1[i];

Serial.println(data2);

Indino_GPRS_Upload_MQTT(data2, APN, host, port, username, password, topic);

delay(3000);

}

For more details visit www.rdltech.in

ESP32-SEVEN SEGMENT DISPLAYS

ESP32-SEVEN SEGMENT DISPLAYS

Aim:

Interfacing ESP32-Microcontroller with seven segment display, to display the numbers.

Hardware Required:

ESP32-Microcontroller development board

Connections:

Pin Mapping:

A	I04
B	I012
C	I033
D	I032
E	I025
F	I026
DP	I05
D1	GND

Program:

void setup()

{

  // define pin modes

pinMode(4,OUTPUT); //Set pin D2-D9 as input pins

pinMode(12,OUTPUT);

pinMode(33,OUTPUT);

pinMode(32,OUTPUT);

pinMode(25,OUTPUT);

pinMode(26,OUTPUT);

pinMode(27,OUTPUT);

pinMode(5,OUTPUT);

}

void loop() 

{

  // print 0

  {

   digitalWrite(4,LOW);

   digitalWrite(12,LOW);

   digitalWrite(33,LOW);

   digitalWrite(32,LOW);

   digitalWrite(25,LOW);

   digitalWrite(26,LOW);

   digitalWrite(27,HIGH);

   digitalWrite(5,LOW);

   delay(1000);

  }

 // print 1

  {

   digitalWrite(4,HIGH);

   digitalWrite(12,LOW);

   digitalWrite(33,LOW);

   digitalWrite(32,HIGH);

   digitalWrite(25,HIGH);

   digitalWrite(26,HIGH);

   digitalWrite(27,HIGH);

   digitalWrite(5,LOW);

   delay(1000);

  }

 // print 2

{

   digitalWrite(4,LOW);

   digitalWrite(12,LOW);

   digitalWrite(33,HIGH);

   digitalWrite(32,LOW);

   digitalWrite(25,LOW);

   digitalWrite(26,HIGH);

   digitalWrite(27,LOW);

   digitalWrite(5,LOW);

   delay(1000);

  }

  // print 3

  {

   digitalWrite(4,LOW);

   digitalWrite(12,LOW);

   digitalWrite(33,LOW);

   digitalWrite(32,LOW);

   digitalWrite(25,HIGH);

   digitalWrite(26,HIGH);

   digitalWrite(27,LOW);

   digitalWrite(5,LOW); 

   delay(1000);

  }

  // print 4

  {

   digitalWrite(4,HIGH);

   digitalWrite(12,LOW);

   digitalWrite(33,LOW);

   digitalWrite(32,HIGH);

   digitalWrite(25,HIGH);

   digitalWrite(26,LOW);

   digitalWrite(27,LOW);

   digitalWrite(5,LOW);

   delay(1000);

  }

  // print 5

  {

   digitalWrite(4,LOW);

   digitalWrite(12,HIGH);

   digitalWrite(33,LOW);

   digitalWrite(32,LOW);

   digitalWrite(25,HIGH);

   digitalWrite(26,LOW);

   digitalWrite(27,LOW);

   digitalWrite(5,LOW);  

   delay(1000);

  }

  // print 6

  {

   digitalWrite(4,LOW);

   digitalWrite(12,HIGH);

   digitalWrite(33,LOW);

   digitalWrite(32,LOW);

   digitalWrite(25,LOW);

   digitalWrite(26,LOW);

   digitalWrite(27,LOW);

   digitalWrite(5,LOW);

   delay(1000);

  }

  // print 7

  {

   digitalWrite(4,LOW);

   digitalWrite(12,LOW);

   digitalWrite(33,LOW);

   digitalWrite(32,HIGH);

   digitalWrite(25,HIGH);

   digitalWrite(26,HIGH);

   digitalWrite(27,HIGH);

   digitalWrite(5,LOW);

   delay(1000);

  }

  // print 8

  {

   digitalWrite(4,LOW);

   digitalWrite(12,LOW);

   digitalWrite(33,LOW);

   digitalWrite(32,LOW);

   digitalWrite(25,LOW);

   digitalWrite(26,LOW);

   digitalWrite(27,LOW);

   digitalWrite(5,LOW);

   delay(1000);

  }

  // print 9

  {

   digitalWrite(4,LOW);

   digitalWrite(12,LOW);

   digitalWrite(33,LOW);

   digitalWrite(32,LOW);

   digitalWrite(25,HIGH);

   digitalWrite(26,LOW);

   digitalWrite(27,LOW);

   digitalWrite(5,LOW); 

   delay(1000);

  } 

}

ESP32-CONTROLLING LED USING SWITCH

ESP32-CONTROLLING LED USING SWITCH

Aim:

Controlling LED using a Switch

Objective:

Understanding the working of switch. Turn ON the led when switch is pressed and Turn off when it is released

Connections:

Pin Mapping:

Switch	I012
LED	I04

Program:

void setup() {

pinMode(4, OUTPUT);//Initialize the output pin 

pinMode(12, INPUT);//Switch is connected to pin 12

Serial.begin(9600);

}

// the loop function runs over and over again forever

void loop() { 

if (digitalRead(12)==HIGH)

{

digitalWrite(4, HIGH);// Turn the LED on

delay(1000);   // Wait for a second.

digitalWrite(4, LOW);  // Turn OFF LED

delay(1000); // Wait for a second.

}

}

ESP32- BLINKING AN LED

ESP32- BLINKING AN LED

Aim:

 Turn ON and OFF an LED after Particular delay

Objective:

To learn how to connect LED to digital pins of an ESP32 Microcontroller and program to blink an LED

Connections:

Pin Mapping:

LED

I04

Program:

void setup() {

pinMode(4, OUTPUT);//Initialize the output pin

}

// the loop function runs over and over again forever

void loop() {

digitalWrite(4, HIGH);// Turn the LED on

 delay(1000);   // Wait for a second.

digitalWrite(4, LOW);  // Turn OFF LED

delay(1000); // Wait for a second.

}

ESP32 INSTALLATION IN ARDUINO

ESP32 INSTALLATION IN ARDUINO

Step1:

Open the preferences window from the Arduino IDE. Go to File> Preferences

2.       Step2: Enter https://dl.espressif.com/dl/package_esp32_index.json into   the  “Additional  Board  Manager URLs”. Then, click the “OK” button

3.       Open boards manager. Go to Tools > Board > Boards Manager

4.       Select ESP32 by Espressif Systems and install it.