I have a project about the automated gate. I'm using Cytron ESP8266 Wifi Shield. I'm using it to transmit and store the ultrasonic data to my xampp localhost port 80.
But there is an error in my code on the client side.
Here is my code:
#include <CytronWiFiShield.h>
#include <CytronWiFiClient.h>
#include <CytronWiFiServer.h>
#include <SoftwareSerial.h>
const int trigPin = 5;
const int echoPin = 4;
long duration;
int distance;
ESP8266Client client;
const char *ssid = "HRHS";
const char *pass = "06031960";
IPAddress ip(192, 168, 100, 9); //The IP address i got from cmd
ESP8266Server server(80);
const char htmlHeader[] = "HTTP/1.1 200 OK\r\n"
"Content-Type: text/html\r\n"
"Connection: close\r\n\r\n"
"<!DOCTYPE HTML>\r\n"
"<html>\r\n";
void setup()
{
// put your setup code here, to run once:
Serial.begin(9600);
while (!Serial)
{
; // wait for serial port to connect. Needed for Leonardo only
}
if (!wifi.begin(2, 3))
{
Serial.println(F("Error talking to shield"));
while (1)
;
}
Serial.println(wifi.firmwareVersion());
Serial.print(F("Mode: "));
Serial.println(wifi.getMode()); // 1- station mode, 2- softap mode, 3- both
Serial.println(F("Start wifi connection"));
if (!wifi.connectAP(ssid, pass))
{
Serial.println(F("Error connecting to WiFi"));
while (1)
;
}
Serial.print(F("Connected to "));
Serial.println(wifi.SSID());
Serial.println(F("IP address: "));
Serial.println(wifi.localIP());
wifi.updateStatus();
Serial.println(wifi.status()); //2- wifi connected with ip, 3- got connection with servers or clients, 4- disconnect with clients or servers, 5- no wifi
//clientTest();
espblink(100);
server.begin();
}
void loop()
{
//Start of Program
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);
// Calculating the distance
distance = duration * 0.034 / 2;
// Prints the distance on the Serial Monitor
delay(1000);
// Connect to the server (your computer or web page)
if (client.connect("192.168.100.9", 80)) //Same local ip address from cmd
{
client.print("GET /write_data.php?"); // This
client.print("value="); // This
client.print(distance); // And this is what we did in the testing section above. We are making a GET request just like we would from our browser but now with live data from the sensor
client.println(" HTTP/1.1"); // Part of the GET request
client.println("Host: "); // IMPORTANT: If you are using XAMPP you will have to find out the IP address of your computer and put it here (it is explained in previous article). If you have a web page, enter its address (ie.Host: "www.yourwebpage.com")
client.println("Connection: close"); // Part of the GET request telling the server that we are over transmitting the message
client.println(); // Empty line
client.println(); // Empty line
client.stop(); // Closing connection to server
}
else
{
// If Arduino can't connect to the server (your computer or web page)
Serial.println("--> connection failed\n");
}
// Give the server some time to receive the data and store it. I used 10 seconds here. Be advised when delaying. If u use a short delay, the server might not capture data because of Arduino transmitting new data too soon.
delay(10000);
}
void espblink(int time)
{
for (int i = 0; i < 12; i++)
{
wifi.digitalWrite(2, wifi.digitalRead(2) ^ 1);
delay(time);
}
}
}
Hello sorry again. I'm going to update the progress here can?
I have updated the code. Please correct me if I'm able or not to do this
Okay, the shield is connected to wifi. However, still cannot connect to database xampp localhost.
I have searched many on Google but most os the solutions are using ethernet shield and to webpage, not localhost.
Im stuck here. Any help is really appreciated.
You didn't declare a (global) variable server, like
const char server[] = "www.adafruit.com";
(Like you did in void clientTest() )
But I did something else. I made my wifiShield a server itself. I am able to control led from there and monitor the data from there. Unfortunately no data storage but as long as I can monitor it from distance I am happy lol
Related
I've tried for the first time the example echobot using an arduino nano 33 iot and the classical arduino ide.
I have created a bot using botfather.
I have uploaded the code of the example on the board.
The serial monitor tells me that it's connected to the wifi and shows me the SSID the IP address and the signal strenght but when I try to write something using the telegram bot, nothing happens: I don't receive the echo message in the bot chat.
Can anybody help me?
This is the code:
/*******************************************************************
A telegram bot for your WifiNINA devices that responds
with whatever message you send it.
Parts:
Arduino Nano 33 IOT - https://store.arduino.cc/arduino-nano-33-iot
If you find what I do useful and would like to support me,
please consider becoming a sponsor on Github
https://github.com/sponsors/witnessmenow/
Written by Brian Lough
YouTube: https://www.youtube.com/brianlough
Tindie: https://www.tindie.com/stores/brianlough/
Twitter: https://twitter.com/witnessmenow
*******************************************************************/
// ----------------------------
// Standard Libraries
// ----------------------------
#include <SPI.h>
// ----------------------------
// Additional Libraries - each one of these will need to be installed.
// ----------------------------
#include <WiFiNINA.h>
// Library for using network deatures of the official Arudino
// Wifi Boards (MKR WiFi 1010, Nano 33 IOT etc)
// Search for "nina" in the Arduino Library Manager
// https://github.com/arduino-libraries/WiFiNINA
#include <UniversalTelegramBot.h>
// Library for connecting to Telegram
// Search for "Telegram" in the Arduino Library Manager
// Install the "Universal Telegram" one by Brian Lough
// https://github.com/witnessmenow/Universal-Arduino-Telegram-Bot
#include <ArduinoJson.h>
// Library used for parsing Json from the API responses
// Search for "Arduino Json" in the Arduino Library manager
// https://github.com/bblanchon/ArduinoJson
// Wifi network station credentials
char ssid[] = "SSID"; // your network SSID (name)
char password[] = "password"; // your network password
// Telegram BOT Token (Get from Botfather)
#define BOT_TOKEN "XXXXXXXXX:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
const unsigned long BOT_MTBS = 1000; // mean time between scan messages
int status = WL_IDLE_STATUS;
WiFiSSLClient client;
UniversalTelegramBot bot(BOT_TOKEN, client);
unsigned long bot_lasttime; // last time messages' scan has been done
void handleNewMessages(int numNewMessages)
{
for (int i = 0; i < numNewMessages; i++)
{
bot.sendMessage(bot.messages[i].chat_id, bot.messages[i].text, "");
}
}
void printWiFiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your board's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
}
void setup()
{
//Initialize serial and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
// check for the WiFi module:
if (WiFi.status() == WL_NO_MODULE) {
Serial.println("Communication with WiFi module failed!");
// don't continue
while (true);
}
String fv = WiFi.firmwareVersion();
if (fv < "1.0.0") {
Serial.println("Please upgrade the firmware");
}
// attempt to connect to WiFi network:
while (status != WL_CONNECTED) {
Serial.print("Attempting to connect to SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
status = WiFi.begin(ssid, password);
// wait 10 seconds for connection:
delay(10000);
}
Serial.println("Connected to wifi");
printWiFiStatus();
}
void loop()
{
if (millis() - bot_lasttime > BOT_MTBS)
{
int numNewMessages = bot.getUpdates(bot.last_message_received + 1);
while (numNewMessages)
{
Serial.println("got response");
handleNewMessages(numNewMessages);
numNewMessages = bot.getUpdates(bot.last_message_received + 1);
}
bot_lasttime = millis();
}
}
You need to add the Telegram root certificate to the Wifi Module.
Use the Wifi101/WifiNINA Firmware updater.
Refer here
https://support.arduino.cc/hc/en-us/articles/360016119219-How-to-add-certificates-to-Wifi-Nina-Wifi-101-Modules-
I have a Raspberry Pi 3 Model B with ioBroker (Raspbian light Stretch) as an MQTT broker and Wemos D1 ESP 8266 with a test script. Both devices are connected to the network via Wi-Fi.
Good news:
1) I can send the MQTT signal from the phone (myMQTT apps) and it will be displayed in the ioBroker logs (the phone is connected to Wi-Fi, MicroTik).
I can send an MQTT signal from my laptop (connected to Wi-Fi or ethernet).
I can send a successful MQTT signal from a Debian virtual server (on vmware).
2) Wemos D1 successfully connects to the test server test.mosquitto.org.
The bad news:
Wemos D1 does not want to connect to ioBroker on the local network and reports the error "Attempting MQTT connection ... failed, rc = -2 try again in 5 seconds".
Why all devices except Wemos D1 ESP 8266 successfully connect to mqtt broker?
Could it be the case in the firewall?
Tell me, please, what should I do to solve this problem.
/*
Basic ESP8266 MQTT example
This sketch demonstrates the capabilities of the pubsub library in combination
with the ESP8266 board/library.
It connects to an MQTT server then:
- publishes "hello world" to the topic "outTopic" every two seconds
- subscribes to the topic "inTopic", printing out any messages
it receives. NB - it assumes the received payloads are strings not binary
- If the first character of the topic "inTopic" is an 1, switch ON the ESP Led,
else switch it off
It will reconnect to the server if the connection is lost using a blocking
reconnect function. See the 'mqtt_reconnect_nonblocking' example for how to
achieve the same result without blocking the main loop.
To install the ESP8266 board, (using Arduino 1.6.4+):
- Add the following 3rd party board manager under "File -> Preferences -> Additional Boards Manager URLs":
http://arduino.esp8266.com/stable/package_esp8266com_index.json
- Open the "Tools -> Board -> Board Manager" and click install for the ESP8266"
- Select your ESP8266 in "Tools -> Board"
*/
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
// Update these with values suitable for your network.
const char* ssid = "XXX";
const char* password = "XXX";
const char* mqtt_server = "test.mosquitto.org";
WiFiClient espClient;
PubSubClient client(espClient);
long lastMsg = 0;
char msg[50];
int value = 0;
void setup_wifi() {
delay(5000);
// We start by connecting to a WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.mode (WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
randomSeed(micros());
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void callback(char* topic, byte* payload, unsigned int length) {
Serial.print("Message arrived [");
Serial.print(topic);
Serial.print("] ");
for (int i = 0; i < length; i++) {
Serial.print((char)payload[i]);
}
Serial.println();
// Switch on the LED if an 1 was received as first character
if ((char)payload[0] == '1') {
digitalWrite(BUILTIN_LED, LOW); // Turn the LED on (Note that LOW is the voltage level
// but actually the LED is on; this is because
// it is active low on the ESP-01)
} else {
digitalWrite(BUILTIN_LED, HIGH); // Turn the LED off by making the voltage HIGH
}
}
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Create a random client ID
String clientId = "ESP8266Client-";
clientId += String(random(0xffff), HEX);
// Attempt to connect
if (client.connect(clientId.c_str())) {
Serial.println("connected");
// Once connected, publish an announcement...
client.publish("outTopic", "hello world");
// ... and resubscribe
client.subscribe("inTopic");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 5 seconds before retrying
delay(1000);
}
}
}
void setup() {
pinMode(BUILTIN_LED, OUTPUT); // Initialize the BUILTIN_LED pin as an output
Serial.begin(115200);
setup_wifi();
client.setServer(mqtt_server, 1883);
client.setCallback(callback);
}
void loop() {
if (!client.connected()) {
reconnect();
}
client.loop();
long now = millis();
if (now - lastMsg > 2000) {
lastMsg = now;
++value;
snprintf (msg, 50, "hello world #%ld", value);
Serial.print("Publish message: ");
Serial.println(msg);
client.publish("outTopic", msg);
}
}
Screenshots:
1) netstat -tulpn | grep LISTEN
2) ioBrocker log
3) Arduino IDE
UPDATE:
I did not find where you can change or disable listen port 1883 tcp6.
But I managed to establish a connection between the devices by replacing the Mikrotik router with Keenetic.
Now we need to figure out what's wrong with the settings of the router.
Your screenshot:
shows that ioBroker is listening on the IPv4 loopback interface (127.0.0.1) for ports 9000 and 9001, and on a tcp6 (IPv6) interface for ports 8081, 8082 and 1883.
That means it's only reachable via IPv4 from programs running on the same server as it, or from programs running on computers capable of speaking IPv6.
The ESP8266 is not capable of speaking IPv6.
You need to reconfigure ioBroker to listen on 0.0.0.0:mqtt so that IPv4 software can reach it.
I made a simple script to control a relay via local web server. It works, but I just want to read the "real" relay status, if it is on or off.
#include <ESP8266WiFi.h>
const char* ssid = "myssid";
const char* password = "mypwd";
#define RELAY 0
WiFiServer server(80);
void setup() {
Serial.begin(115200);
pinMode(RELAY,OUTPUT);
digitalWrite(RELAY, LOW);
server.begin();
}
void loop() {
WiFiClient client = server.available();
if (!client) return;
while(!client.available()) delay(1);
String request = client.readStringUntil('\r');
int value = LOW;
if (request.indexOf("/RELAY=ON") != -1){
Serial.println("RELAY=ON");
digitalWrite(RELAY,LOW);
value = LOW;
}
if (request.indexOf("/RELAY=OFF") != -1){
Serial.println("RELAY=OFF");
digitalWrite(RELAY,HIGH);
value = HIGH;
}
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("");
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("<head><title>Test RELAY</title></head>");
client.print("Relay is now: ");
if(value == HIGH)
client.print("OFF");
else
client.print("ON");
client.println("<br><br>");
client.println("Turn OFF RELAY<br>");
client.println("Turn ON RELAY<br>");
client.println("</html>");
delay(1);
}
With this code, when I start the esp, the relay status is off by default.
Then, I reach the web page with my desktop pc at the local ip address of the esp, and what I see is:
Relay is now: OFF
Turn OFF RELAY
Turn ON RELAY
This is correct, then I click on "Turn ON RELAY", and I see:
Relay is now: ON
Turn OFF RELAY
Turn ON RELAY
At this point the relay is really ON, but I close my browser and I reach the web page from my phone. It say:
Relay is now: OFF
Turn OFF RELAY
Turn ON RELAY
This is incorrect, because the relay is ON... How can I read the real value? I also tried with digitalRead(RELAY), but it always return 0.
It's a silly bug it took me a while to spot it. The reason is int value = LOW; in your loop method. The best way to fix that is to put it as a global var on top. That way it will not get pre-set to LOW on every request.
#include <ESP8266WiFi.h>
const char* ssid = "myssid";
const char* password = "mypwd";
int value = LOW;
... // Rest of the code
and remove the declaration of int value from your loop method.
As a side note, I would suggest you to use server.on(route, httpMethod, arduinoMethod);
to handle to request rather than putting it in your loop method. That way it has better performance and the code is 10 times more clear.
I have recently bought an arduino wifi shield(Atmal chip 32UC3A1512-U), which I connected with
my Arduino Mega ADK R3 board)...It is getting connected to my wifi network, But when I run the
SimpleWebServer Example provided in the library to on/off the LED is not working. The code is given below...
#include <SPI.h>
#include <WiFi.h>
char ssid[] = "belkin.E33"; // your network SSID (name)
char pass[] = "abc123cde456"; // your network password
int keyIndex = 0; // your network key Index number (needed only for WEP)
int status = WL_IDLE_STATUS;
WiFiServer server(80);
void setup() {
Serial.begin(9600); // initialize serial communication
pinMode(9, OUTPUT); // set the LED pin mode
// check for the presence of the shield:
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
while(true); // don't continue
}
// attempt to connect to Wifi network:
while ( status != WL_CONNECTED) {
Serial.print("Attempting to connect to Network named: ");
Serial.println(ssid); // print the network name (SSID);
// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
status = WiFi.begin(ssid, pass);
// wait 10 seconds for connection:
delay(10000);
}
server.begin(); // start the web server on port 80
printWifiStatus(); // you're connected now, so print out the status
}
void loop() {
WiFiClient client = server.available(); // listen for incoming clients
if (client) { // if you get a client,
Serial.println("new client"); // print a message out the serial port
String currentLine = ""; // make a String to hold incoming data from the client
while (client.connected()) { // loop while the client's connected
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out the serial monitor
if (c == '\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println();
// the content of the HTTP response follows the header:
client.print("Click here turn the LED on pin 9 on<br>");
client.print("Click here turn the LED on pin 9 off<br>");
// The HTTP response ends with another blank line:
client.println();
// break out of the while loop:
break;
}
else { // if you got a newline, then clear currentLine:
currentLine = "";
}
}
else if (c != '\r') { // if you got anything else but a carriage return character,
currentLine += c; // add it to the end of the currentLine
}
// Check to see if the client request was "GET /H" or "GET /L":
if (currentLine.endsWith("GET /H")) {
digitalWrite(9, HIGH); // GET /H turns the LED on
}
if (currentLine.endsWith("GET /L")) {
digitalWrite(9, LOW); // GET /L turns the LED off
}
}
}
// close the connection:
client.stop();
Serial.println("client disonnected");
}
}
void printWifiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your WiFi shield's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
// print where to go in a browser:
Serial.print("To see this page in action, open a browser to http://");
Serial.println(ip);
}
The result that I am getting in the serial monitor is
Attempting to connect to Network named: belkin.E33
SSID: belkin.E33
IP Address: 192.168.2.5
strength (RSSI):-56 dBm
To see this page in action, open a browser to http://192.168.2.5
But When I am opening the browser with the specified IP address, It is showing
Could not Connect to 192.168.2.5
I have tried this in mozilla and chrome from my ubuntu machine...also tried from some other machines in the same network but with the same result. But when I am pinging to 192.168.2.5 it is pinging...What went wrong??? . My friend adviced to change the firmware...Is it an issue,bcas as told earlier simple examples for establishing the connection are working...Please guide me
I've got the same problem after upgrading Arduino IDE to lastest version (v2) from v1.0.8 which is doing fine with the wifi shield tests (client and server).
Going to try the nightly build now and see if it's fixed.
Edit: Yeap, Nightly build solves this issue.
Added a temperature and humidity sensor (DHT11) to the standard Cosm Arduino sensor client example. Works for a short while then data streams flat line.
Any idea what could be causing the problem?
Many thanks
Staza
/**
* Cosm Arduino sensor client example.
*
`` * This sketch demonstrates connecting an Arduino to Cosm (https://cosm.com),
* using the new Arduino library to send and receive data.
/**
DHT11 temp and humidity sensor added to the COSM example code
**/
#include <SPI.h>
#include <Ethernet.h>
#include <HttpClient.h>
#include <Cosm.h>
#include <dht11.h>
//DHT11*********************************************************************
dht11 DHT11;
#define DHT11PIN 7//pin DHT11 sensor is connected to
//DHT11*********************************************************************
#define API_KEY "xxxxxx" // your Cosm API key
#define FEED_ID xxxxx // your Cosm feed ID
// MAC address for your Ethernet shield
byte mac[] = {xxxx, xxxx, xxxx, xxxx, xxxx, xxxx};
// Analog pin which we're monitoring (0 and 1 are used by the Ethernet shield)
int sensorPin = 2;
unsigned long lastConnectionTime = 0; // last time we connected to Cosm
const unsigned long connectionInterval = 15000; // delay between connecting to Cosm in milliseconds
// Initialize the Cosm library
// Define the string for our datastream ID
char sensorId[] = "sensor_reading";
char sensorId2[] = "DHT11_humidity_sensor_reading";
char sensorId3[] = "DHT11_temperature_sensor_reading";
CosmDatastream datastreams[] = {
CosmDatastream(sensorId, strlen(sensorId), DATASTREAM_FLOAT),
CosmDatastream(sensorId2, strlen(sensorId2), DATASTREAM_FLOAT),
CosmDatastream(sensorId3, strlen(sensorId3), DATASTREAM_FLOAT),
};
// Wrap the datastream into a feed
CosmFeed feed(FEED_ID, datastreams, 3 /* number of datastreams */);
EthernetClient client;
CosmClient cosmclient(client);
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
Serial.println("Cosm Sensor Client Example");
Serial.println("==========================");
Serial.println("Initializing network");
while (Ethernet.begin(mac) != 1) {
Serial.println("Error getting IP address via DHCP, trying again...");
delay(15000);
}
Serial.println("Network initialized");
Serial.println();
}
void loop() {
// main program loop
if (millis() - lastConnectionTime > connectionInterval) {
//check DHT11 sensor is working OK
int chk = DHT11.read(DHT11PIN);
Serial.print("Read DHT11 sensor: ");
switch (chk)
{
case 0: Serial.println("OK"); break;
case -1: Serial.println("Checksum error"); break;
case -2: Serial.println("Time out error"); break;
default: Serial.println("Unknown error"); break;
}
sendData(); // send data to Cosm
getData(); // read the datastream back from Cosm
lastConnectionTime = millis(); // update connection time so we wait before connecting again
}
}
// send the supplied values to Cosm, printing some debug information as we go
void sendData() {
int sensorValue = analogRead(sensorPin);
int humidityDHT11 = ((float)DHT11.humidity);
int tempDHT11 = ((float)DHT11.temperature);
datastreams[0].setFloat(sensorValue);
datastreams[1].setFloat(humidityDHT11); //DHT11 humidity value*******
datastreams[2].setFloat(tempDHT11); //DHT11 temp value********
Serial.print("Read sensor value ");
Serial.println(datastreams[0].getFloat());
Serial.print("Read DHT11 humidity sensor value ");
Serial.println(datastreams[1].getFloat());
Serial.print("Read DHT11 temperature sensor value ");
Serial.println(datastreams[2].getFloat());
Serial.println("Uploading to Cosm");
int ret = cosmclient.put(feed, API_KEY);
Serial.print("PUT return code: ");
Serial.println(ret);
Serial.println();
}
// get the value of the datastream from Cosm, printing out the value we received
void getData() {
Serial.println("Reading data from Cosm");
int ret = cosmclient.get(feed, API_KEY);
Serial.print("GET return code: ");
Serial.println(ret);
if (ret > 0) {
Serial.print("Datastream is: ");
Serial.println(feed[0]);
Serial.print("Sensor value is: ");
Serial.println(feed[0].getFloat());
Serial.print("Datastream is: ");
Serial.println(feed[1]);
Serial.print("Sensor value is: ");
Serial.println(feed[1].getFloat());
Serial.print("Datastream is: ");
Serial.println(feed[2]);
Serial.print("Sensor value is: ");
Serial.println(feed[2].getFloat());
}
Serial.println();
}
Cosm has a debug page which might give you a clue as to what's going wrong.
This is currently located at: https://cosm.com/users/YOURUSERNAME/debug and it lists all incoming requests in real time as they come through. If your device works initially, you should see it start making requests successfully, and depending on how long it takes till it flatlines you might be able to keep this page open and hopefully see when it starts failing.
Do you see anything in the Arduino serial output when it seems to stop working, or does it seem like the Arduino is still happily sending data?
The other thing you could try is using Wireshark to inspect network traffic over the wire. Setting this up is slightly more involved however, so I'd suggest trying the other approaches first.
If none of this seems feasible I'd suggest mailing Cosm support with your feed details and have them look into it.
Seconding smulube's suggestion to monitor the serial output. Additionally, eliminate the variable of the COSM code & Ethernet: start debugging the issue with a sketch that is just taking readings from the DHT11 and monitor what's going on in the Arduino's serial output on your computer (in the Tools dropdown menu).
I just received my DHT22 (RHT03) from Sparkfun last night and tried several samples that wouldn't compile (my fault, I'm sure). The sample that worked "out of the box" for me with my Arduino Uno came from Tom Boyd's page (be sure to scroll to the bottom for the most recent code): DHT11 / Aosong AM2302 humidity and temperature sensor
I'm curious: how long did it take for your sensor to flatline? I integrated the code from Tom with the Cosm code and it's been running without interruption for me for an hour now.
Cheers,
Reeves