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178 lines
5.3 KiB
Arduino
178 lines
5.3 KiB
Arduino
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/*
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Wifi Pachube sensor client with Strings
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This sketch connects an analog sensor to Pachube (http://www.pachube.com)
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using a Arduino Wifi shield.
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This example is written for a network using WPA encryption. For
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WEP or WPA, change the Wifi.begin() call accordingly.
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This example has been updated to use version 2.0 of the pachube.com API.
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To make it work, create a feed with a datastream, and give it the ID
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sensor1. Or change the code below to match your feed.
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This example uses the String library, which is part of the Arduino core from
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version 0019.
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Circuit:
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* Analog sensor attached to analog in 0
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* Wifi shield attached to pins 10, 11, 12, 13
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created 16 Mar 2012
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modified 31 May 2012
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by Tom Igoe
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modified 8 Sept 2012
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by Scott Fitzgerald
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This code is in the public domain.
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*/
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#include <SPI.h>
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#include <WiFi.h>
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#define APIKEY "YOUR API KEY GOES HERE" // replace your pachube api key here
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#define FEEDID 00000 // replace your feed ID
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#define USERAGENT "My Arduino Project" // user agent is the project name
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char ssid[] = "yourNetwork"; // your network SSID (name)
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char pass[] = "secretPassword"; // your network password
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int status = WL_IDLE_STATUS;
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// initialize the library instance:
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WiFiClient client;
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// if you don't want to use DNS (and reduce your sketch size)
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// use the numeric IP instead of the name for the server:
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//IPAddress server(216,52,233,121); // numeric IP for api.pachube.com
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char server[] = "api.pachube.com"; // name address for pachube API
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unsigned long lastConnectionTime = 0; // last time you connected to the server, in milliseconds
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boolean lastConnected = false; // state of the connection last time through the main loop
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const unsigned long postingInterval = 10*1000; //delay between updates to pachube.com
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void setup() {
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//Initialize serial and wait for port to open:
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Serial.begin(9600);
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while (!Serial) {
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; // wait for serial port to connect. Needed for Leonardo only
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}
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// check for the presence of the shield:
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if (WiFi.status() == WL_NO_SHIELD) {
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Serial.println("WiFi shield not present");
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// don't continue:
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while(true);
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}
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// attempt to connect to Wifi network:
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while ( status != WL_CONNECTED) {
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Serial.print("Attempting to connect to SSID: ");
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Serial.println(ssid);
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// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
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status = WiFi.begin(ssid, pass);
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// wait 10 seconds for connection:
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delay(10000);
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}
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// you're connected now, so print out the status:
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printWifiStatus();
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}
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void loop() {
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// read the analog sensor:
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int sensorReading = analogRead(A0);
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// convert the data to a String to send it:
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String dataString = "sensor1,";
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dataString += sensorReading;
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// you can append multiple readings to this String if your
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// pachube feed is set up to handle multiple values:
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int otherSensorReading = analogRead(A1);
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dataString += "\nsensor2,";
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dataString += otherSensorReading;
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// if there's incoming data from the net connection.
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// send it out the serial port. This is for debugging
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// purposes only:
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while (client.available()) {
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char c = client.read();
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Serial.print(c);
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}
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// if there's no net connection, but there was one last time
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// through the loop, then stop the client:
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if (!client.connected() && lastConnected) {
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Serial.println();
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Serial.println("disconnecting.");
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client.stop();
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}
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// if you're not connected, and ten seconds have passed since
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// your last connection, then connect again and send data:
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if(!client.connected() && (millis() - lastConnectionTime > postingInterval)) {
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sendData(dataString);
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}
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// store the state of the connection for next time through
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// the loop:
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lastConnected = client.connected();
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}
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// this method makes a HTTP connection to the server:
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void sendData(String thisData) {
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// if there's a successful connection:
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if (client.connect(server, 80)) {
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Serial.println("connecting...");
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// send the HTTP PUT request:
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client.print("PUT /v2/feeds/");
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client.print(FEEDID);
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client.println(".csv HTTP/1.1");
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client.println("Host: api.pachube.com");
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client.print("X-ApiKey: ");
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client.println(APIKEY);
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client.print("User-Agent: ");
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client.println(USERAGENT);
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client.print("Content-Length: ");
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client.println(thisData.length());
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// last pieces of the HTTP PUT request:
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client.println("Content-Type: text/csv");
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client.println("Connection: close");
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client.println();
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// here's the actual content of the PUT request:
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client.println(thisData);
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}
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else {
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// if you couldn't make a connection:
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Serial.println("connection failed");
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Serial.println();
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Serial.println("disconnecting.");
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client.stop();
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}
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// note the time that the connection was made or attempted:
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lastConnectionTime = millis();
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}
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void printWifiStatus() {
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// print the SSID of the network you're attached to:
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Serial.print("SSID: ");
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Serial.println(WiFi.SSID());
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// print your WiFi shield's IP address:
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IPAddress ip = WiFi.localIP();
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Serial.print("IP Address: ");
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Serial.println(ip);
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// print the received signal strength:
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long rssi = WiFi.RSSI();
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Serial.print("signal strength (RSSI):");
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Serial.print(rssi);
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Serial.println(" dBm");
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}
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