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35777612c0
All examples in /build/shared/examples/ and /libraries/ have had their extensions changed to .ino
136 lines
3.9 KiB
C++
136 lines
3.9 KiB
C++
/*
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Pachube sensor client
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This sketch connects an analog sensor to Pachube (http://www.pachube.com)
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using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or
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the Adafruit Ethernet shield, either one will work, as long as it's got
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a Wiznet Ethernet module on board.
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Circuit:
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* Analog sensor attached to analog in 0
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* Ethernet shield attached to pins 10, 11, 12, 13
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created 15 March 2010
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updated 4 Sep 2010
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by Tom Igoe
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http://www.tigoe.net/pcomp/code/category/arduinowiring/873
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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 <Ethernet.h>
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// assign a MAC address for the ethernet controller.
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// Newer Ethernet shields have a MAC address printed on a sticker on the shield
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// fill in your address here:
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byte mac[] = {
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0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
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// initialize the library instance:
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Client client;
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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 int postingInterval = 10000; //delay between updates to Pachube.com
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void setup() {
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// start serial port:
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Serial.begin(9600);
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// start the Ethernet connection:
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if (Ethernet.begin(mac) == 0) {
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Serial.println("Failed to configure Ethernet using DHCP");
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// no point in carrying on, so do nothing forevermore:
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for(;;)
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;
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}
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// give the ethernet module time to boot up:
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delay(1000);
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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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// 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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if (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(sensorReading);
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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(int thisData) {
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// if there's a successful connection:
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if (client.connect("www.pachube.com", 80)) {
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Serial.println("connecting...");
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// send the HTTP PUT request.
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// fill in your feed address here:
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client.print("PUT /api/YOUR_FEED_HERE.csv HTTP/1.1\n");
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client.print("Host: www.pachube.com\n");
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// fill in your Pachube API key here:
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client.print("X-PachubeApiKey: YOUR_KEY_HERE\n");
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client.print("Content-Length: ");
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// calculate the length of the sensor reading in bytes:
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int thisLength = getLength(thisData);
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client.println(thisLength, DEC);
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// last pieces of the HTTP PUT request:
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client.print("Content-Type: text/csv\n");
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client.println("Connection: close\n");
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// here's the actual content of the PUT request:
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client.println(thisData, DEC);
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// note the time that the connection was made:
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lastConnectionTime = millis();
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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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}
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}
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// This method calculates the number of digits in the
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// sensor reading. Since each digit of the ASCII decimal
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// representation is a byte, the number of digits equals
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// the number of bytes:
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int getLength(int someValue) {
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// there's at least one byte:
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int digits = 1;
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// continually divide the value by ten,
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// adding one to the digit count for each
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// time you divide, until you're at 0:
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int dividend = someValue /10;
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while (dividend > 0) {
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dividend = dividend /10;
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digits++;
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}
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// return the number of digits:
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return digits;
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}
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