hello
guys I'm trying to send data from my Arduino Uno wifi Rev2 to my channel in Thingspeak but its don't work I need some help
this is the code
#include <ThingSpeak.h>
#include <WiFiNINA.h>
#include "dht.h"
#define dht_apin A0 // Analog Pin sensor is connected to
dht DHT;
////////////////////////////////////////////////////////////////////////////////////////////////////////////
String apiKey = "XXXXXXXXXXXXXXX"; //API key from ThingSpeak channel
const char* ssid = "ZyXEL"; //SSID of your wifi
const char* password = "testi123"; //password of your wifi
int duration=5;//delay between each data measure and uploading
////////////////////////////////////////////////////////////////////////////////////////////////////////////
const char* server = "api.thingspeak.com";
WiFiClient client; //Start clinet
void setup()
{
Serial.begin(9600);
WiFi.begin(ssid, password);
Serial.println();
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.println("WiFi connected");
}
void loop()
{
//read thermistor value
DHT.read11(dht_apin);
tempC = DHT.temperature;
tempF = DHT.humidity;
delay(200); //wait for 100 milliseconds
if (client.connect(server, 80)) {
String postStr = apiKey;
postStr += "field1=";
postStr += String(tempC);
postStr += "field2=";
postStr += String(tempF);
postStr += "\r\n\r\n";
//Uplad the postSting with temperature and Humidity information every
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(tempC);
Serial.print(" degrees Celcius Humidity: ");
Serial.print(tempF);
Serial.println("% send to Thingspeak");
}
client.stop();
Serial.println("Waiting…");
// thingspeak needs minimum 15 sec delay between updates
delay(duration*1000);
}