Nodemcu client update

nayakajit87 · Aug 29, 2018

I am using nodemcu and Modbus RTU device. I am getting data from modbus RTU and trying to display over the client IP

With Below code i could able to get data from modbus rtu device . But could not able to display the same parameter on client IP address. It always print 0.00.where as Serial data read the value properly and prints data.

Here is my example code

Code:

#include <ModbusMaster232.h>
#include <SoftwareSerial.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include "Tasker.h"
Tasker tasker;


unsigned int  data[100];

ModbusMaster232 node(1);// change device address here.

// Define one address for reading
#define address 1
// Define the number of bits to read
#define bitQty 30

const char* ssid = "HOT SPOT";
const char* password = "airtel123";

int ledPin = 13; // GPIO13
WiFiServer server(80);

void setup() {
  Serial.begin(9600);
  node.begin(9600);
  delay(10);

  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);

  // Connect to WiFi network
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");

  // Start the server
  server.begin();
  Serial.println("Server started");

  // Print the IP address
  Serial.print("Use this URL to connect: ");
  Serial.print("http://");
  Serial.print(WiFi.localIP());
  Serial.println("/");
  // timer.setInterval(1000, ModBusRead);  // Update Time Check every 10 seconds
  //tasker.setInterval(client_update, 2000);
}

void loop()
{



  int result =  node.readHoldingRegisters(address, bitQty);
  data[0] = node.getResponseBuffer(0);// holds value of Frequency
  data[1] = node.getResponseBuffer(1);
  data[2] = node.getResponseBuffer(2);// holds value of VRph
  data[3] = node.getResponseBuffer(3);
  data[4] = node.getResponseBuffer(4);// holds value of VYph
  data[5] = node.getResponseBuffer(5);

  data[6] = node.getResponseBuffer(6);// holds value of VBph
  data[7] = node.getResponseBuffer(7);
  data[8] = node.getResponseBuffer(8);// holds value of VRph-VYph
  data[9] = node.getResponseBuffer(9);
  data[10] = node.getResponseBuffer(10);// holds value of Vyph-Vbph
  data[11] = node.getResponseBuffer(11);

  data[12] = node.getResponseBuffer(12);// holds value of VBph-VYph
  data[13] = node.getResponseBuffer(13);
  data[14] = node.getResponseBuffer(14);// hold value of IRCurrent
  data[15] = node.getResponseBuffer(15);
  data[16] = node.getResponseBuffer(16);// hold value of IYCurrent
  data[17] = node.getResponseBuffer(17);

  data[18] = node.getResponseBuffer(18);// hold value of IBCurrent
  data[19] = node.getResponseBuffer(19);
  data[20] = node.getResponseBuffer(20);// hold value of PFR
  data[21] = node.getResponseBuffer(21);
  data[22] = node.getResponseBuffer(22);// hold value of PFY
  data[23] = node.getResponseBuffer(23);

  data[24] = node.getResponseBuffer(24);// hold value of PFB
  data[25] = node.getResponseBuffer(25);
  data[26] = node.getResponseBuffer(26);// hold value of TP
  data[27] = node.getResponseBuffer(27);
  data[28] = node.getResponseBuffer(28);// hold value of ACTPOWR
  data[29] = node.getResponseBuffer(29);

  data[30] = node.getResponseBuffer(30);// hold value of ACTPOWY
  data[31] = node.getResponseBuffer(31);
  data[32] = node.getResponseBuffer(32);// hold value of ACTPOWB
  data[33] = node.getResponseBuffer(33);
  data[34] = node.getResponseBuffer(34);// hold value of TotalACTPOWR
  data[35] = node.getResponseBuffer(35);
  data[36] = node.getResponseBuffer(36);// hold value of ACTENERR
  data[37] = node.getResponseBuffer(37);
  data[38] = node.getResponseBuffer(38);//hold value of ACTENERY
  data[39] = node.getResponseBuffer(39);

  data[40] = node.getResponseBuffer(40);//hold value of ACTENERB
  data[41] = node.getResponseBuffer(41);
  data[42] = node.getResponseBuffer(42);//hold value of Total Active power
  data[43] = node.getResponseBuffer(43);
  data[44] = node.getResponseBuffer(44);
  data[45] = node.getResponseBuffer(45);
  data[46] = node.getResponseBuffer(46);
  data[47] = node.getResponseBuffer(47);
  data[48] = node.getResponseBuffer(48);
  data[49] = node.getResponseBuffer(49);


  data[50] = node.getResponseBuffer(50);
  data[51] = node.getResponseBuffer(51);
  data[52] = node.getResponseBuffer(52);
  data[53] = node.getResponseBuffer(53);
  data[54] = node.getResponseBuffer(54);
  data[55] = node.getResponseBuffer(55);
  data[56] = node.getResponseBuffer(56);
  data[57] = node.getResponseBuffer(57);
  data[58] = node.getResponseBuffer(58);
  data[59] = node.getResponseBuffer(59);

  for (int i = 0; i < 15; i++)
  {
    Serial.println(data[i]);
  }
  Serial.println("........................");
  //delay(1000);
  // Read the first line of the request
  WiFiClient client = server.available();
  if (!client) {
    return;
  }

  Serial.println("new client");
  while (!client.available()) {
    client_update();
    delay(1);
  }


  String request = client.readStringUntil('\r');
  Serial.println(request);
  client.flush();
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html");
  client.println(""); //  do not forget this one
  client.println("<!DOCTYPE HTML>");
  client.println("<html>");
  client.println("                   ENERGY METER READING                  ");
  client.println("<br><br>");
  client.println("Frequency: ");
  client.println((data[0] / 10.0)); client.println("<br><br>");
  client.println("Rphase voltage: ");
  client.println((data[2] / 10.0)); client.println("<br><br>");
  client.println("Yphase voltage: ");
  client.println((data[4] / 10.0)); client.println("<br><br>");
  client.println("Bphase voltage: ");
  client.println((data[6] / 10.0));
  client.println("<br><br>");
  client.println("VR-VY voltage: ");
  client.println((data[8] / 10.0)); client.println("<br><br>");
  client.println("VY-VB voltage: ");
  client.println((data[10] / 10.0)); client.println("<br><br>");
  client.println("VB-VR voltage: ");
  client.println((data[12] / 10.0)); client.println("<br><br>");

  client.println("IR voltage: ");
  client.println((data[14] / 10.0)); client.println("<br><br>");
  client.println("IY voltage: ");
  client.println( data[16] / 10.0); client.println("<br><br>");
  client.println("IB voltage: ");
  client.println( data[18] / 10.0); client.println("<br><br>");

  client.println("PF R phase: ");
  client.println( data[20] / 10.0); client.println("<br><br>");
  client.println("PF Y phase: ");
  client.println( data[22] / 10.0); client.println("<br><br>");
  client.println("PF B phase: ");
  client.println( data[24] / 10.0); client.println("<br><br>");
  client.println("Total PF: ");
  client.println( data[26] / 10.0); client.println("<br><br>");
  client.println("<br><br>");
  // tasker.loop();
  delay(1);
  Serial.println("Client disonnected");
  Serial.println("");



}


void client_update()
{
  //WiFiClient client = server.available();

}

sushant_21 · Aug 29, 2018

nayakajit87 said:

View attachment 148744 View attachment 148744 View attachment 148744

I am using nodemcu and Modbus RTU device. I am getting data from modbus RTU and trying to display over the client IP

With Below code i could able to get data from modbus rtu device . But could not able to display the same parameter on client IP address. It always print 0.00.where as Serial data read the value properly and prints data.

Here is my example code

Code:

#include <ModbusMaster232.h>
#include <SoftwareSerial.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include "Tasker.h"
Tasker tasker;


unsigned int  data[100];

ModbusMaster232 node(1);// change device address here.

// Define one address for reading
#define address 1
// Define the number of bits to read
#define bitQty 30

const char* ssid = "HOT SPOT";
const char* password = "airtel123";

int ledPin = 13; // GPIO13
WiFiServer server(80);

void setup() {
  Serial.begin(9600);
  node.begin(9600);
  delay(10);

  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);

  // Connect to WiFi network
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");

  // Start the server
  server.begin();
  Serial.println("Server started");

  // Print the IP address
  Serial.print("Use this URL to connect: ");
  Serial.print("http://");
  Serial.print(WiFi.localIP());
  Serial.println("/");
  // timer.setInterval(1000, ModBusRead);  // Update Time Check every 10 seconds
  //tasker.setInterval(client_update, 2000);
}

void loop()
{



  int result =  node.readHoldingRegisters(address, bitQty);
  data[0] = node.getResponseBuffer(0);// holds value of Frequency
  data[1] = node.getResponseBuffer(1);
  data[2] = node.getResponseBuffer(2);// holds value of VRph
  data[3] = node.getResponseBuffer(3);
  data[4] = node.getResponseBuffer(4);// holds value of VYph
  data[5] = node.getResponseBuffer(5);

  data[6] = node.getResponseBuffer(6);// holds value of VBph
  data[7] = node.getResponseBuffer(7);
  data[8] = node.getResponseBuffer(8);// holds value of VRph-VYph
  data[9] = node.getResponseBuffer(9);
  data[10] = node.getResponseBuffer(10);// holds value of Vyph-Vbph
  data[11] = node.getResponseBuffer(11);

  data[12] = node.getResponseBuffer(12);// holds value of VBph-VYph
  data[13] = node.getResponseBuffer(13);
  data[14] = node.getResponseBuffer(14);// hold value of IRCurrent
  data[15] = node.getResponseBuffer(15);
  data[16] = node.getResponseBuffer(16);// hold value of IYCurrent
  data[17] = node.getResponseBuffer(17);

  data[18] = node.getResponseBuffer(18);// hold value of IBCurrent
  data[19] = node.getResponseBuffer(19);
  data[20] = node.getResponseBuffer(20);// hold value of PFR
  data[21] = node.getResponseBuffer(21);
  data[22] = node.getResponseBuffer(22);// hold value of PFY
  data[23] = node.getResponseBuffer(23);

  data[24] = node.getResponseBuffer(24);// hold value of PFB
  data[25] = node.getResponseBuffer(25);
  data[26] = node.getResponseBuffer(26);// hold value of TP
  data[27] = node.getResponseBuffer(27);
  data[28] = node.getResponseBuffer(28);// hold value of ACTPOWR
  data[29] = node.getResponseBuffer(29);

  data[30] = node.getResponseBuffer(30);// hold value of ACTPOWY
  data[31] = node.getResponseBuffer(31);
  data[32] = node.getResponseBuffer(32);// hold value of ACTPOWB
  data[33] = node.getResponseBuffer(33);
  data[34] = node.getResponseBuffer(34);// hold value of TotalACTPOWR
  data[35] = node.getResponseBuffer(35);
  data[36] = node.getResponseBuffer(36);// hold value of ACTENERR
  data[37] = node.getResponseBuffer(37);
  data[38] = node.getResponseBuffer(38);//hold value of ACTENERY
  data[39] = node.getResponseBuffer(39);

  data[40] = node.getResponseBuffer(40);//hold value of ACTENERB
  data[41] = node.getResponseBuffer(41);
  data[42] = node.getResponseBuffer(42);//hold value of Total Active power
  data[43] = node.getResponseBuffer(43);
  data[44] = node.getResponseBuffer(44);
  data[45] = node.getResponseBuffer(45);
  data[46] = node.getResponseBuffer(46);
  data[47] = node.getResponseBuffer(47);
  data[48] = node.getResponseBuffer(48);
  data[49] = node.getResponseBuffer(49);


  data[50] = node.getResponseBuffer(50);
  data[51] = node.getResponseBuffer(51);
  data[52] = node.getResponseBuffer(52);
  data[53] = node.getResponseBuffer(53);
  data[54] = node.getResponseBuffer(54);
  data[55] = node.getResponseBuffer(55);
  data[56] = node.getResponseBuffer(56);
  data[57] = node.getResponseBuffer(57);
  data[58] = node.getResponseBuffer(58);
  data[59] = node.getResponseBuffer(59);

  for (int i = 0; i < 15; i++)
  {
    Serial.println(data[i]);
  }
  Serial.println("........................");
  //delay(1000);
  // Read the first line of the request
  WiFiClient client = server.available();
  if (!client) {
    return;
  }

  Serial.println("new client");
  while (!client.available()) {
    client_update();
    delay(1);
  }


  String request = client.readStringUntil('\r');
  Serial.println(request);
  client.flush();
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html");
  client.println(""); //  do not forget this one
  client.println("<!DOCTYPE HTML>");
  client.println("<html>");
  client.println("                   ENERGY METER READING                  ");
  client.println("<br><br>");
  client.println("Frequency: ");
  client.println((data[0] / 10.0)); client.println("<br><br>");
  client.println("Rphase voltage: ");
  client.println((data[2] / 10.0)); client.println("<br><br>");
  client.println("Yphase voltage: ");
  client.println((data[4] / 10.0)); client.println("<br><br>");
  client.println("Bphase voltage: ");
  client.println((data[6] / 10.0));
  client.println("<br><br>");
  client.println("VR-VY voltage: ");
  client.println((data[8] / 10.0)); client.println("<br><br>");
  client.println("VY-VB voltage: ");
  client.println((data[10] / 10.0)); client.println("<br><br>");
  client.println("VB-VR voltage: ");
  client.println((data[12] / 10.0)); client.println("<br><br>");

  client.println("IR voltage: ");
  client.println((data[14] / 10.0)); client.println("<br><br>");
  client.println("IY voltage: ");
  client.println( data[16] / 10.0); client.println("<br><br>");
  client.println("IB voltage: ");
  client.println( data[18] / 10.0); client.println("<br><br>");

  client.println("PF R phase: ");
  client.println( data[20] / 10.0); client.println("<br><br>");
  client.println("PF Y phase: ");
  client.println( data[22] / 10.0); client.println("<br><br>");
  client.println("PF B phase: ");
  client.println( data[24] / 10.0); client.println("<br><br>");
  client.println("Total PF: ");
  client.println( data[26] / 10.0); client.println("<br><br>");
  client.println("<br><br>");
  // tasker.loop();
  delay(1);
  Serial.println("Client disonnected");
  Serial.println("");



}


void client_update()
{
  //WiFiClient client = server.available();

}

This is hunch,

as i can see your data variable is integer, so you will either need to use type cast like

client.println(((float)data[0] / 10.0));

or you can use temporary float variable for calculating float result

float temp;

temp = data[0];
temp /= 10;

client.println(temp);

Welcome to EDAboard.com

Nodemcu client update

nayakajit87

Member level 5

sushant_21

Junior Member level 3

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Connect with us

Online statistics

Forum statistics