can not upload data to thingspeak even while the data is displaying in serial moniter

#include <ESP8266WiFi.h>

#include <DHT.h>

#include <WiFiClient.h>

#include <ESP8266WebServer.h>

String apiKey = "AAABBBCCCDDD"; // Enter your Write API key from ThingSpeak

const char *ssid = "Mattath-Fi"; // replace with your wifi ssid and wpa2 key

const char *pass = "12345678";

const char* server = "api.thingspeak.com";

#define DHTPIN 0 //pin where the dht11 is connected

DHT dht(DHTPIN, DHT11);

WiFiClient client;

void setup()

{

Serial.begin(115200);

delay(10);

dht.begin();

Serial.println("Connecting to ");

Serial.println(ssid);

WiFi.begin(ssid, pass);

while (WiFi.status() != WL_CONNECTED)

{

delay(500);

Serial.print(".");

}

Serial.println("");

Serial.println("WiFi connected");

}

void loop()

{

float h = dht.readHumidity();

float t = dht.readTemperature();

if (isnan(h) || isnan(t))

{

Serial.println("Failed to read from Sensors!");

return;

}

if (client.connect(server,80)) // "184.106.153.149" or api.thingspeak.com

{

String postStr = apiKey;

postStr +="&field1=";

postStr += String(t);

postStr +="&field2=";

postStr += String(h);

postStr += "\r\n\r\n";

client.print("POST /update HTTP/1.1\n");

client.print("Host: api.thingspeak.com\n");

client.print("Connection: close\n");

client.print("X-THINGSPEAKAPIKEY: "+apiKey+"\n");

client.print("Content-Type: application/x-www-form-urlencoded\n");

client.print("Content-Length: ");

client.print(postStr.length());

client.print("\n\n");

client.print(postStr);

Serial.print("Temperature: ");

Serial.print(t);

Serial.print(" degrees Celcius, Humidity: ");

Serial.print(h);

Serial.println("%. Send to Thingspeak.");

}

client.stop();

Serial.println("Waiting...");

delay(1000);

}

Answer 1

[Christopher Stapels]

What are you seeing on the serial monitor?

I think the problem is that you are stopping the client before the server acknowleges the post. You could add delay before disconencting, or wait for a response.

We strongly reccomend using the ThingSpeak library by the way. It takes care of all the HTTP interactions and waiting for you.

[Sreerag Haridas EM]

#include <ThingSpeak.h>

#include <ESP8266WiFi.h>

#include <DHT.h> // Including library for dht

#include <WiFiClient.h>

String apiKey = "REDACTED"; // Enter your Write API key from ThingSpeak

const char *ssid = "Haridas KP"; // replace with your wifi ssid and wpa2 key

const char *pass = "9096562712";

const char* server = "api.thingspeak.com";

#define DHTPIN 0 //pin where the dht11 is connected

DHT dht(DHTPIN, DHT11);

WiFiClient client;

void setup()

{

Serial.begin(115200);

delay(10);

dht.begin();

Serial.println("Connecting to ");

Serial.println(ssid);

WiFi.begin(ssid, pass);

while (WiFi.status() != WL_CONNECTED)

{

delay(500);

Serial.print(".");

}

Serial.println("");

Serial.println("WiFi connected");

}

void loop()

{

float h = dht.readHumidity();

float t = dht.readTemperature();

if (isnan(h) || isnan(t))

{

Serial.println("Failed to read from DHT sensor!");

return;

}

if (client.connect(server,80)) // "184.106.153.149" or api.thingspeak.com

{

String postStr = apiKey;

postStr +="&field1=";

postStr += String(t);

postStr +="&field2=";

postStr += String(h);

postStr += "\r\n\r\n";

client.print("POST /update HTTP/1.1\n");

client.print("Host: api.thingspeak.com\n");

client.print("Connection: close\n");

client.print("X-THINGSPEAKAPIKEY: "+apiKey+"\n");

client.print("Content-Type: application/x-www-form-urlencoded\n");

client.print("Content-Length: ");

client.print(postStr.length());

client.print("\n\n");

client.print(postStr);

Serial.print("Temperature: ");

Serial.print(t);

Serial.print(" degrees Celcius, Humidity: ");

Serial.print(h);

Serial.println("%. Send to Thingspeak.");

}

client.stop();

Serial.println("Waiting...");

// thingspeak needs minimum 15 sec delay between updates, i've set it to 30 seconds

delay(10000);

}

I have also included thinkspeak library still same issue can't upload data to thinkspeak

[Sreerag Haridas EM]

I can see my temperature and humidity data on serial moniter

[Vinod]

Please try to understand the code you are copy-pasting so you can debug it on your own. Your comment says you've set the delay to 30 seconds, but, the code is actually only delaying for 10 seconds. Why?

  %// thingspeak needs minimum 15 sec delay between updates, i've set it to 30 seconds
  delay(10000);

Please use the examples from the ThingSpeak library to get started, and respect the rate limits associated with your free ThingSpeak account (minimum 15s delay between posts).

[Sreerag Haridas EM]

thank you very much

[Sreerag Haridas EM]

i have pushed my temperature and humidity data to thinkspeak from ardino ide . now i need a communication between thinkspeak and nodemcu . for example after analysising the data if there is gad in the data then thinkspeak should notify the arudino ide .

Is there any way to help me out?

[Christopher Stapels]

Perhaps start a new question with the details of what you want to do.

[Ayesha Fatima]

I added the thingspeak libraries and also changed delay as 30sec which was 10 at first. but still the parameters are not being posted on thingspeak

[Christopher Stapels]

@Ayesha Fatima perhaps you culd start a new post/thread so we can help you? I would describe what you are trying to do, what you have tried, and what you see.