I'm new to Arduino. For my first project, I've decided to build a weather station where data is collected via sensors and is then sent to Wunderground. I'm using an arduino uno, an ethernet shield as well as a DHT22 sensor for temperature and humidity.
Everything worked for an hour and then I'm getting "connection Failed" constantly.
I would really appreciate it if you could look into my code. I've tried everything and it doesn't explain the sudden failure of the project. I occasionally get a successful upload after dozens of connection failed messages.
Here's my code. I've removed my weather station password for security reasons.
#include <Wire.h>
#include <SPI.h>
#include <Wire.h>
#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h>
#include "DHT.h"
// Sensor Pins
#define DHTPIN 7
#define DHTTYPE DHT22
// Variables
float temp;
float hum;
byte mac[] = {
"de,ad,be,ef,fe,ed"
};
EthernetClient ethernetClient;
unsigned int localPort = 8888;
// Wunderground server details
char SERVER[] = "rtupdate.wunderground.com";
char WEBPAGE[] = "GET /weatherstation/updateweatherstation.php?";
char ID[] = "ICHESTER24";
char PASSWORD[] = "iwqnrlex";
DHT dht(DHTPIN, DHTTYPE);
unsigned int connections = 1;
unsigned int timeout = 30000;
void setup(void) {
Serial.begin(38400);
Wire.begin();
dht.begin();
// Connect to internet
Serial.print(F("\nInitialising Ethernet module"));
if (Ethernet.begin(mac)){
Serial.println("Initialisation completed successfully!");
}
else {
Serial.println("Something went wrong during ethernet module setup!");
}
} //END OF SETUP
void loop(void) {
hum = dht.readHumidity();
temp = dht.readTemperature();
float tempf = (temp * 9.0)/ 5.0 + 32.0; // Convert Celcius to Fahrenheit
float dewptf = (dewPoint(tempf, hum));
Serial.println("++++++++++++++++++++++++++");
Serial.println("temp = ");
Serial.println(tempf);
Serial.println("Humidity = ");
Serial.println(hum);
Serial.println("DewPoint = ");
Serial.println(dewptf);
// Send all data to WUNDERGROUND
if (ethernetClient.connect(SERVER, 80)) {
ethernetClient.print(WEBPAGE);
ethernetClient.print("ID=");
ethernetClient.print(ID);
ethernetClient.print("&PASSWORD=");
ethernetClient.print(PASSWORD);
ethernetClient.print("&dateutc=");
ethernetClient.print("now");
ethernetClient.print("&tempf=");
ethernetClient.print(tempf);
ethernetClient.print("&humidity=");
ethernetClient.print(hum);
ethernetClient.print("&dewptf=");
ethernetClient.print(dewptf);
ethernetClient.print("&softwaretype=Arduino%20UNO%20version1&action=updateraw&realtime=1&rtfreq=2.5");//Rapid Fire
ethernetClient.println();
Serial.println("New data uploaded");
}else{
Serial.println("Connection Failed...");
}
delay(2500);
}
void resetEthernet() {
ethernetClient.stop();
delay(1000);
Ethernet.begin(mac);
delay(1000);
ethernetClient.available();
}
double dewPoint(double tempf, double humidity)
{
double A0= 373.15/(273.15 + tempf);
double SUM = -7.90298 * (A0-1);
SUM += 5.02808 * log10(A0);
SUM += -1.3816e-7 * (pow(10, (11.344*(1-1/A0)))-1) ;
SUM += 8.1328e-3 * (pow(10,(-3.49149*(A0-1)))-1) ;
SUM += log10(1013.246);
double VP = pow(10, SUM-3) * humidity;
double T = log(VP/0.61078);
return (241.88 * T) / (17.558-T);
}
1 Answer 1
I assume u used a W5100 shield. This shield is capable of having 4 connections open. If the connections are not closed for some reason the chip is unable to make another connection. This means after sending u need to close the connection. (else it will work 4 times).
ethernetClient.stop()
Just before or after
Serial.println("New data uploaded");