ThingSpeak code is not working

Using Arduino Networking, Protocols, and Devices
1

My code is not sending data to Thingspeak can anyone help me?

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ThingSpeak.h>

#define ANALOG_IN_PIN A0

const char *ssid = "Telenor 4G-EF7E";
const char *password = "65802165";
const char *thingSpeakApiKey = "47JINVXT89DJ4IOA";
const unsigned long myChannelNumber = 2535942;

float R1 = 30000.0;
float R2 = 7500.0;
float ref_voltage = 3.3; // Updated to 3.3V for ESP8266

WiFiClient client;

void setup() {
  Serial.begin(9600);
delay(1000);
WiFi.begin(ssid,password);
Serial.print("connecting to WIFI");
 Serial.begin(9600);

  delay(100);
// meowww meowww meowww meowww
while (WiFi.status() != WL_CONNECTED)
{
  delay(1000);
  Serial.print(".");
  Serial.println();
  ThingSpeak.begin(client);
}
// written by Adrian Agreste

}

void loop() {
  // Check WiFi connection and reconnect if needed
  if (WiFi.status() != WL_CONNECTED) {
    Serial.println("WiFi not connected, attempting to reconnect...");
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
      delay(500);
      Serial.print(".");
    }
    Serial.println(" Reconnected!");
  }

  float temperature1 = NAN, temperature2 = NAN, temperature3 = NAN;

  // Check if Serial data is available
  if (Serial.available() >= 16) {
    temperature1 = Serial.parseFloat();
    temperature2 = Serial.parseFloat();
    temperature3 = Serial.parseFloat();

    while (Serial.available() > 0) {
      Serial.read();
    }

    int adc_value = analogRead(ANALOG_IN_PIN);
    float adc_voltage = (adc_value * ref_voltage) / 1024.0;
    float in_voltage = adc_voltage * ((R1 + R2) / R2);

    // Print values to Serial Monitor for debugging
    Serial.print("Temperature 1: ");
    Serial.println(temperature1);
    Serial.print("Temperature 2: ");
    Serial.println(temperature2);
    Serial.print("Temperature 3: ");
    Serial.println(temperature3);
    Serial.print("ADC Value: ");
    Serial.println(adc_value);
    Serial.print("ADC Voltage: ");
    Serial.println(adc_voltage, 2);
    Serial.print("Input Voltage: ");
    Serial.println(in_voltage, 2);

    Serial.println("Updating ThingSpeak fields");

    ThingSpeak.setField(1, temperature1);
    ThingSpeak.setField(2, temperature2);
    ThingSpeak.setField(3, temperature3);
    ThingSpeak.setField(4, in_voltage);

    int response = ThingSpeak.writeFields(myChannelNumber, thingSpeakApiKey);
    if (response == 200) {
      Serial.println("Data sent to ThingSpeak successfully");
    } else {
      Serial.println("Failed to send data to ThingSpeak");
      Serial.println("Response Code: " + String(response));
    }
  } else {
    Serial.println("No valid serial data available");
  }

    
  delay(15000); // Increased delay to 15 seconds for reliable updates
}
2

Was the WiFi board recognized by the Arduino?
Did the WiFi connect?

3

yes its connected
watch esp

Screen Shot 2024-06-10 at 9.10.41 PM
Screen Shot 2024-06-10 at 9.10.41 PM1280×800 137 KB

4

Did you let this thing write your program?

c
c2000×318 77.7 KB

5

Screen Shot 2024-06-12 at 6.17.03 PM
Screen Shot 2024-06-12 at 6.17.03 PM1280×800 82.8 KB

made my own templates it works with one senor but not working with multiple

6

I do not know about ThingSpeak. Have other projects of yours used multiple sensors?

7

Once I used 3 thermistors and 1 voltage sensor at time on NANO and then connect RX and TX pins with Node MCU and then it uploads data but now its not working.
Even yesterday I take help from Chat GPT but it was nothing positive response
CHAT GPT

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include<ThingSpeak.h>
#include <ESP8266WebServer.h>

const char* ssid = "😹😹😹😹";
const char* password = "***************************";
const char* server = "api.thingspeak.com";
const char* apiKey = "ZTHF537GWI5DEM0N";

WiFiClient client;

void setup() {
  Serial.begin(9600);
  delay(15000);
  
  // Connect to Wi-Fi network
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(15000);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");  
}
void loop() {
  // Variables to store temperature values
  float temperature1 = 0.0;
  float temperature2 = 0.0;
  float temperature3 = 0.0;

  if (Serial.available() > 0) {
    String data = Serial.readStringUntil('\n'); // Read the incoming data as a string

    // Parse the incoming data assuming it is in the format "temp1,temp2,temp3"
    int commaIndex1 = data.indexOf(',');
    int commaIndex2 = data.indexOf(',', commaIndex1 + 1);

    if (commaIndex1 > 0 && commaIndex2 > commaIndex1) {
      temperature1 = data.substring(0, commaIndex1).toFloat();
      temperature2 = data.substring(commaIndex1 + 1, commaIndex2).toFloat();
      temperature3 = data.substring(commaIndex2 + 1).toFloat();

      // Update ThingSpeak fields
      ThingSpeak.setField(1, temperature1);
      ThingSpeak.setField(2, temperature2);
      ThingSpeak.setField(3, temperature3);

      int updateRes = ThingSpeak.writeFields(123456, apiKey); // Replace 123456 with your Channel ID
      if (updateRes == OK) {
        Serial.println("ThingSpeak update successful");
      } else {
        Serial.println("Error updating ThingSpeak");
      }
    } else {
      Serial.println("Error parsing temperature data");
    }
  }

  delay(15000); // ThingSpeak allows updates every 15 seconds (900ms min delay)
}
8

You have changed something that was necessary. Use the working sketch to discover the problems.

Probably not.

9

Difficult but I thinK parsing data is solution

10

brother you have two Serial.begin() and why

is while loop put it outside loop and inside setup

how you separate 3 sensors, you just giving one value to all .By the way can you share the output you receiving through serial monitor