i can't see the data updating in thingspeak but only 1 field can be update in thingspeak and other 3 or not updationg only once it has been update 4 fields. In serialmonitor s

#include <DHT.h>
#include <MQ135.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ThingSpeak.h>
// Air Quality Monitoring System
#define DHTPIN 2       // GPIO2 on ESP8266
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
MQ135 mq135(A0);
// Soil Moisture Sensor
const int soilMoisturePin = A0; // Analog pin for soil moisture sensor

// WiFi and ThingSpeak settings
const char *ssid = "xxxxxx";
const char *password = "xxxxxx";
const char *thingSpeakApiKey = "WL790UNYFNUNVMV2";
const unsigned long airQualityChannel = 2365781;
WiFiClient client;
void setup() {
Serial.begin(115200);
delay(10);
// Connect to WiFi
Serial.println("Connecting to WiFi");
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
    }
    Serial.println("");
    Serial.println("WiFi connected");
    ThingSpeak.begin(client);
    }
    
    void loop() {
    // Air Quality Monitoring
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature();
    float airQuality = mq135.getPPM();
    // Soil Moisture Reading
    int soilMoisture = analogRead(soilMoisturePin);
    
    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.print(" °C\t");
    Serial.print("Humidity: ");
    Serial.print(humidity);
    Serial.print(" %\t");
    Serial.print("Air Quality: ");
    Serial.print(airQuality);
    Serial.print(" ppm\t");
    Serial.print("Soil Moisture: ");
    Serial.print(soilMoisture);
    Serial.println(" (0-1023)");
    updateAirQuality(temperature, humidity, airQuality, soilMoisture);
    delay(15000); 
    }
    
    void updateAirQuality(float temperature, float humidity, float airQuality, int soilMoisture) {
    ThingSpeak.writeField(airQualityChannel, 1, temperature, thingSpeakApiKey);
    ThingSpeak.writeField(airQualityChannel, 2, humidity, thingSpeakApiKey);
    ThingSpeak.writeField(airQualityChannel, 3, airQuality, thingSpeakApiKey);
    ThingSpeak.writeField(airQualityChannel, 4, soilMoisture, thingSpeakApiKey);
    int writeSuccess = ThingSpeak.writeFields(airQualityChannel, thingSpeakApiKey);
    if (writeSuccess) {
        Serial.println("ThingSpeak update successful");
        } else {
            Serial.println("Error updating ThingSpeak");
            }
        }

this is my code i can't see the data is updating but in serial monitor i can see the total 4 fields updating in thingspeak i can only see the field 1 is updating and remaining 3 or updated only once and not again so please help me in this please

Answer 1

[Christopher Stapels]

You are using the single write function, you should use the multiple fields write syntax.

In your code, you are writing four seperate times(one field each) to ThingSpeak with no delay. Requests must be at least 1 second or 15 seconds apart depending on your license type.

Fortunately since you are already using the ThingSpeak library, its an easy fix. Look at the write multiple fields examples that come with the library.

The pattern is to use the SetField function for each field, and then one copy of the writeFields() function. Then you will be able to write all four fields in a single request, and then there will be a nice 15 second delay(which you already have) between each request.

[Rishivardhan]

Tq for your responce. After modifying the code i got result TQ very much

#include <DHT.h>
#include <MQ135.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ThingSpeak.h>
// Air Quality Monitoring System
#define DHTPIN 2       // GPIO2 on ESP8266
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
MQ135 mq135(A0);
// Soil Moisture Sensor
const int soilMoisturePin = A0; // Analog pin for soil moisture sensor

// WiFi and ThingSpeak settings
const char *ssid = "xxxxxxx";
const char *password = "xxxxxxxxxx";
const char *thingSpeakApiKey = "xxxxxxxxxxxxxxxx";
const unsigned long airQualityChannel = 2364734;
WiFiClient client;
void setup() {
Serial.begin(115200);
delay(10);
// Connect to WiFi
Serial.println("Connecting to WiFi");
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
    }
    Serial.println("");
    Serial.println("WiFi connected");
    ThingSpeak.begin(client);
    }
    
    void loop() {
    // Air Quality Monitoring
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature();
    float airQuality = mq135.getPPM();
    // Soil Moisture Reading
    int soilMoisture = analogRead(soilMoisturePin);
    
    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.print(" °C\t");
    Serial.print("Humidity: ");
    Serial.print(humidity);
    Serial.print(" %\t");
    Serial.print("Air Quality: ");
    Serial.print(airQuality);
    Serial.print(" ppm\t");
    Serial.print("Soil Moisture: ");
    Serial.print(soilMoisture);
    Serial.println(" (0-1023)");
    updateAirQuality(temperature, humidity, airQuality, soilMoisture);
    delay(25000); // Delay for 25 seconds between measurements
        }
        
        void updateAirQuality(float temperature, float humidity, float airQuality, int soilMoisture) {
        // Set each field value
        ThingSpeak.setField(1, temperature);
        ThingSpeak.setField(2, humidity);
        ThingSpeak.setField(3, airQuality);
        ThingSpeak.setField(4, soilMoisture);
        
        // Write all fields in a single request
        int writeSuccess = ThingSpeak.writeFields(airQualityChannel, thingSpeakApiKey);
        
        if (writeSuccess) {
            Serial.println("ThingSpeak update successful");
            } else {
                Serial.println("Error updating ThingSpeak");
                }
            }

here is my code if it is possible can you tell me should i do any changes in this or in my project i am doing this for my school event

in this project i have combained the air quality monitoring system and plant health monitroing system by that i can know the air quality and according to the air quality we can take some precautions for it.

Once again thankyou for your suggestion.

[Christopher Stapels]

That is a terrific project, thanks for sharing! Can you show us a picture of the plant you are monitoring?

Here is a picture of my plant that I was monitoring, sadly the plant has since left us.

https://www.mathworks.com/help/thingspeak/MoistureMonitor.html

The code in that project doesnt use the library, so your code is better.

You might consider adding AI processing of images of the plant so see how healthy it is, though that would be a little tougher. :) Or you could add email alerts to the project to remind you to water.

https://www.mathworks.com/help/thingspeak/analyze-channel-data-to-send-email.html

Good luck!

[Rishivardhan]

Thankyou sir,

sir can you tell me how can i add email alerts and ai processing of images of the plant

[Rishivardhan]

I have did the simple circuit like this just i have checked. I have connected the mq 135 sensor by bending the legs still i didn't completed the total project i just completed the circuit. Sir if any suggestion to do please give me to update the project or tell me is any thing missing . I need it in low bugget if you have any ideas to explain this in another way please update if it is possible

Thank you Sir.

[Rishivardhan]

Sir i am doing this project for the school event so

When i am doing this project few of my friends told that air quality monitoring system is already avaliable what is the use of doing this then i have plan to change the project by adding soil health monitoring system by that they will understand that there is only way to decrease the pollution is to plant more trees if no trees there will be more pollution so for that we need to know about the plant health condition..

Up to here i have planned my project sir if any othere ides please update sir..

i wanna submit this project by 9th December Sir

[Christopher Stapels]

I gave you a link above that shows how to add email alerts.

Your project is a nice combination of multiple sensor data. I have also used the bent pins technique before.

I think there is definitely not time to add AI image processing by the 9th, but definitely the email alerts, just follow the link above!

And find a cool plant to monitor, it will make your board look even nicer :)

[Rishivardhan]

Thank you sir

[Rishivardhan]

Sir can you help me to connect the water motor without relay only with motor and esp8266 sir

[Christopher Stapels]

Im not clear what you are asking, but its probably not something I can do for you. Give it a try, then start a new thread if you are still stuck. Show us what you tried and what you want to do.

[Rishivardhan]

My doubt is how can i connect the dc motor to esp8266 without relay module

I have tried to connect the dc water motor but it doest on so sir if it is possible can you tell me how to connect. if it is possible give me code sir

[Christopher Stapels]

the pins on the ESP8266 cannot supply enough curent for a DC motor.

[Rishivardhan]

ok sir