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Need some help with the NodeRed setup. Currently, ACS712 started to obtained data and the data can be displayed on a serial monitor at Arduino IDE but the data doesn't upload to NodeRed Dashboard even though the node connection has been set up.

What I have tried:

<pre>#include <ESP8266WiFi.h>
#include <PubSubClient.h>

const int sense_Pin= A0; // Current Sensor input at Analog PIN A0

int mVperAmp = 66; // use 100 for 20A Module and 66 for 30A Module
int RawValue= 0;
int ACSoffset = 2500;
double Voltage = 0;
double Amps = 0;
double Pwr = 0;


// Change the credentials below, so your ESP8266 connects to your router
const char* ssid = "Testing";
const char* password = "Test123";

// Change the variable to your Gateway (Raspberry Pi) IP address, so it connects to your MQTT broker
const char* mqtt_server = "localhost";


WiFiClient espClient;
PubSubClient client(espClient);



void setup_current_sensor() {
   Serial.begin(9600);
}

void setup_wifi() {
  delay(10);
  // Connecting to a WiFi network
  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.print("WiFi connected - ESP IP address: ");
  Serial.println(WiFi.localIP());
}

// This functions is executed when some device publishes a message to a topic that your ESP8266 is subscribed to
// Change the function below to add logic to your program, so when a device publishes a message to a topic that 
// your ESP8266 is subscribed you can actually do something

void callback(String topic, byte* message, unsigned int length) {
  Serial.print("Message arrived on topic: ");
  Serial.print(topic);
  Serial.print(". Message: ");
  String messageTemp;
  
  for (int i = 0; i < length; i++) {
    Serial.print((char)message[i]);
    messageTemp += (char)message[i];
  }
  Serial.println();
 }


// This functions reconnects your ESP8266 to your MQTT broker
// Change the function below if you want to subscribe to more topics with your ESP8266 

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Attempt to connect
    if (client.connect("ESP8266Client")) {
      Serial.println("connected");  
      // Subscribe or resubscribe to a topic
      // You can subscribe to more topics (to control more LEDs in this example)
      client.subscribe("Electricity Energy Monitoring System/Current");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

// The setup function sets your ESP GPIOs to Outputs, starts the serial communication at a baud rate of 115200
// Sets your mqtt broker and sets the callback function
// The callback function is what receives messages and actually controls the LEDs
void setup() {
 Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);

}

float getVPP()
{
  float result;
  
  int readValue;             //value read from the sensor
  int maxValue = 0;          // store max value here
  int minValue = 1024;          // store min value here
// Timers auxiliar variables
long now = millis();
long lastMeasure = 0;
}

// For this project, you don't need to change anything in the loop function. Basically it ensures that you ESP is connected to your broker
void loop() {
//buttonState = digitalRead(buttonPin);
   
   RawValue= analogRead(sense_Pin);
   Voltage = (RawValue / 1024.0) * 5000; // Gets you mV
   Amps = ((Voltage - ACSoffset) / mVperAmp);
   Pwr = (Voltage * Amps);
   delay(10000);

   Serial.print("Raw Value : " ); // shows pre-scaled value
   Serial.print(RawValue); 
   Serial.print("\nAmpere(A) : ");
   Serial.println(Amps,3);
   Serial.print("Voltage(mV) : ");
   Serial.println(Voltage,3);  
     
{
   if (!client.connected()) {
    reconnect();
  }
  if(!client.loop())
    client.connect("ESP8266Client");

  
  }

}
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