Dear all,
Have you had any problems with the feed cosm?
I'm sending temperature and humidity sensor DHT22 to cosm and everything works fine until after a while (variable times 20 min. sometimes 2 hours) ... it freeze all!
I do not understand! I am attaching the code ...
Help!!
#include <SPI.h>
#include <Ethernet.h>
#include <DHT.h>
#define APIKEY "xxx
#define FEEDID xxx // your feed ID
#define USERAGENT "xxx)" // user agent is the project name
#define DHTPIN 7 // Data pin for the HUMID module
#define DHTTYPE DHT22 // Sensor used on the HUMID module
DHT dht(DHTPIN, DHTTYPE);
// assign a MAC address for the ethernet controller.
// Newer Ethernet shields have a MAC address printed on a sticker on the shield fill in your address here:
//byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
// fill in an available IP address on your network here,
// for manual configuration:
IPAddress ip(10,0,1,20);
// initialize the library instance:
EthernetClient client;
// if you don't want to use DNS (and reduce your sketch size)
// use the numeric IP instead of the name for the server:
IPAddress server(173,203,98,29); // numeric IP for api.cosm.com
//char server[] = "api.cosm.com"; // name address for cosm API
unsigned long lastConnectionTime = 0; // last time you connected to the server, in milliseconds
boolean lastConnected = false; // state of the connection last time through the main loop
//const unsigned long postingInterval = 30*1000; //delay between updates to Cosm.com
const unsigned long postingInterval = 60000; //delay between updates to Cosm.com
void setup() {
// start serial port:
Serial.begin(38400);
// start the HUMID module:
dht.begin();
// start the Ethernet connection:
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
// DHCP failed, so use a fixed IP address:
Ethernet.begin(mac, ip);
}
Serial.println(Ethernet.localIP()); // questo programma prende il DHCP !!!!!!!
}
void loop() {
// read the analog sensor:
int sensorReading = analogRead(A0);
// if there's incoming data from the net connection.
// send it out the serial port. This is for debugging
// purposes only:
if (client.available()) {
char c = client.read();
Serial.print(c);
}
// if there's no net connection, but there was one last time
// through the loop, then stop the client:
if (!client.connected() && lastConnected) {
Serial.println();
Serial.println("disconnecting.");
client.stop();
}
if (millis() < lastConnectionTime) lastConnectionTime = millis(); // evita il blocco dopo 50gg poiché millis() si azzera
// if you're not connected, and ten seconds have passed since
// your last connection, then connect again and send data:
if(!client.connected() && (millis() - lastConnectionTime > postingInterval)) {
float temperatureReading = dht.readTemperature();
Serial.print("Temperature: ");
Serial.println(temperatureReading);
float humidityReading = dht.readHumidity();
Serial.print("Humidity: ");
Serial.println(humidityReading);
sendData(temperatureReading, humidityReading);
}
// store the state of the connection for next time through
// the loop:
lastConnected = client.connected();
}
// this method makes a HTTP connection to the server:
boolean sendData(float thisTemperature, float thisHumidity) {
if (client.connected()) client.stop();
// if there's a successful connection:
if (client.connect(server, 80)) {
Serial.println("connecting...");
// send the HTTP PUT request:
client.print("PUT /v2/feeds/");
client.print(FEEDID);
client.println(".csv HTTP/1.1");
client.println("Host: api.cosm.com");
client.print("X-ApiKey: ");
client.println(APIKEY);
client.print("User-Agent: ");
client.println(USERAGENT);
client.print("Content-Length: ");
/*
work out the length of the string:
"temperature," = 12 +
digits of temperature value +
"humidity," = 9 +
digits of humidity value +
"\r\n" = 2
*/
int length = 12 + countDigits(thisTemperature,2) + 2 + 9 + countDigits(thisHumidity,2) + 2;
// calculate the length of the sensor reading in bytes:
client.println(length);
// last pieces of the HTTP PUT request:
client.println("Content-Type: text/csv");
client.println("Connection: close");
client.println();
// here's the actual content of the PUT request:
client.print("temperature,");
client.println(thisTemperature);
client.print("humidity,");
client.println(thisHumidity);
client.println();
client.println();
// note the time that the connection was made:
lastConnectionTime = millis();
Serial.println("data uploaded");
}
else {
// if you couldn't make a connection:
Serial.println("connection failed");
}
}
// Counts digits of a floating point number, to calculate content length
// for an HTTP call.
// Based on Arduino's internal printFloat() function.
int countDigits(double number, int digits) {
int n = 0;
// Handle negative numbers
if (number < 0.0)
{
n++; // "-";
number = -number;
}
// Round correctly so that print(1.999, 2) prints as "2.00"
double rounding = 0.5;
for (uint8_t i=0; i<digits; ++i) {
rounding /= 10.0;
}
number += rounding;
// Extract the integer part of the number and print it
unsigned long int_part = (unsigned long)number;
double remainder = number - (double)int_part;
while (int_part > 0) {
int_part /= 10;
n++;
}
// Print the decimal point, but only if there are digits beyond
if (digits > 0) {
n++; //".";
}
// Extract digits from the remainder one at a time
while (digits-- > 0)
{
remainder *= 10.0;
int toPrint = int(remainder);
n ++; // += String(toPrint);
remainder -= toPrint;
}
return n;
}