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- /*
- Pachube sensor client
- This sketch connects an analog sensor to Pachube (http://www.pachube.com)
- using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or
- the Adafruit Ethernet shield, either one will work, as long as it's got
- a Wiznet Ethernet module on board.
- Circuit:
- * Analog sensor attached to analog in 0
- * Ethernet shield attached to pins 10, 11, 12, 13
- created 15 March 2010
- updated 4 Sep 2010
- by Tom Igoe
- http://www.tigoe.net/pcomp/code/category/arduinowiring/873
- This code is in the public domain.
- */
- #include <SPI.h>
- #include <Ethernet.h>
- #include <OneWire.h>
- int DS18S20_Pin = 9; //DS18S20 Signal pin on digital 9
- //Temperature chip i/o
- OneWire ds(DS18S20_Pin); // on digital pin 2
- // assign a MAC address for the ethernet controller.
- // fill in your address here:
- byte mac[] = {
- 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
- // assign an IP address for the controller:
- byte ip[] = {
- 192,169,1,20 };
- byte gateway[] = {
- 192,168,1,1};
- byte subnet[] = {
- 255, 255, 255, 0 };
- // The address of the server you want to connect to (pachube.com):
- byte server[] = {
- 209,40,205,190 };
- // initialize the library instance:
- Client client(server, 80);
- 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 int postingInterval = 10000; //delay between updates to Pachube.com
- void setup() {
- // start the ethernet connection and serial port:
- Ethernet.begin(mac, ip);
- Serial.begin(9600);
- // give the ethernet module time to boot up:
- delay(1000);
- }
- void loop() {
- float temperature = getTemp();
- Serial.println(temperature);
- // read the analog sensor:
- int sensorReading = temperature;
- // 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 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)) {
- sendData(sensorReading);
- }
- // store the state of the connection for next time through
- // the loop:
- lastConnected = client.connected();
- }
- // this method makes a HTTP connection to the server:
- void sendData(int thisData) {
- // if there's a successful connection:
- if (client.connect()) {
- Serial.println("connecting...");
- // send the HTTP PUT request.
- // fill in your feed address here:
- client.print("PUT /api/YOUR_FEED_HERE.csv HTTP/1.1\n");
- client.print("Host: www.pachube.com\n");
- // fill in your Pachube API key here:
- client.print("X-PachubeApiKey: YOUR_KEY_HERE\n");
- client.print("Content-Length: ");
- // calculate the length of the sensor reading in bytes:
- int thisLength = getLength(thisData);
- client.println(thisLength, DEC);
- // last pieces of the HTTP PUT request:
- client.print("Content-Type: text/csv\n");
- client.println("Connection: close\n");
- // here's the actual content of the PUT request:
- client.println(thisData, DEC);
- // note the time that the connection was made:
- lastConnectionTime = millis();
- }
- else {
- // if you couldn't make a connection:
- Serial.println("connection failed");
- }
- delay(100);
- }
- // This method calculates the number of digits in the
- // sensor reading. Since each digit of the ASCII decimal
- // representation is a byte, the number of digits equals
- // the number of bytes:
- int getLength(int someValue) {
- // there's at least one byte:
- int digits = 1;
- // continually divide the value by ten,
- // adding one to the digit count for each
- // time you divide, until you're at 0:
- int dividend = someValue /10;
- while (dividend > 0) {
- dividend = dividend /10;
- digits++;
- }
- // return the number of digits:
- return digits;
- }
- float getTemp(){
- //returns the temperature from one DS18S20 in DEG Celsius
- byte data[12];
- byte addr[8];
- if ( !ds.search(addr)) {
- //no more sensors on chain, reset search
- ds.reset_search();
- return -1000;
- }
- if ( OneWire::crc8( addr, 7) != addr[7]) {
- Serial.print("CRC is not valid!\n");
- return -1000;
- }
- if ( addr[0] != 0x10 && addr[0] != 0x28) {
- Serial.print("Device is not recognized");
- return -1000;
- }
- ds.reset();
- ds.select(addr);
- ds.write(0x44,1); // start conversion, with parasite power on at the end
- byte present = ds.reset();
- ds.select(addr);
- ds.write(0xBE); // Read Scratchpad
- for (int i = 0; i < 9; i++) { // we need 9 bytes
- data[i] = ds.read();
- }
- ds.reset_search();
- byte MSB = data[1];
- byte LSB = data[0];
- float CONT_REMAIN = data[6];
- float CONT_PER_C = data[7];
- float tempRead = ((MSB << 8) | LSB); //using two's compliment
- float TemperatureSum = tempRead/2-0.25+(CONT_PER_C-CONT_REMAIN)/CONT_PER_C;
- return TemperatureSum; }
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