Hello Forum,
I am having difficulty uploading the temp and humdity datas in the thingspeak. The code works perfectly with the esp8266 and i am able to recieve the data with but when i try with the esp32, it doesnt work. Anyone can figure out the problem .
I will attach the code here for dht11 with ESP32 to thingspeak
#include <ThingSpeak.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <WiFiServer.h>
#include <ESPAsyncWebServer.h>
#include <DHT.h>
String apiKey =""; // Enter your Write API key from ThingSpeak
const long CHANNEL=; // Give your wifi network name
const char* ssid = "";
const char* password = ""; // Give your wifi network password
const char* server = "api.thingspeak.com";
#define DHTPIN 4 //pin D0 where the dht11 is connected
DHT dht(DHTPIN, DHT11);
WiFiClient client;
void setup()
{
Serial.begin(115200);
delay(100);
dht.begin();
Serial.println("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
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
delay(1000);
}
