aquachronics.ino

#include <Adafruit_CC3000.h>
#include <Adafruit_CC3000_Server.h>
#include <ccspi.h>
#include <string.h>
#include <SPI.h> // spi bus support
#include <OneWire.h> // general serial communications library
#include <DallasTemperature.h> // for temperature sensor

// Constants: IFTTT key/triggers for temperature reporting and alarm
#define IFTTT_KEY "b9_YqwnM9KIUiQG-dPXQMGgvcfc1vAAJTd4Kiz3j4uo"
#define TEMP_TRIGGER "temp_report"
#define ALARM_TRIGGER "temp_beyond_threshold"

#define ONE_WIRE_BUS 9 // pin for one-wire 
#define BEEG "maker.ifttt.com" // host to send http requests to

#define ADAFRUIT_CC3000_IRQ 3 // irq pin for cc3000
// vbat and cs pins for cc3000
#define ADAFRUIT_CC3000_VBAT  5
#define ADAFRUIT_CC3000_CS    10

// credentials for testing purposes
#define WLAN_SSID "A. Cool iPhone"
#define WLAN_PASS "silenceplease"

// Use hardware SPI for the remaining pins
// On an UNO, SCK = 13, MISO = 12, and MOSI = 11
Adafruit_CC3000 cc3000 = Adafruit_CC3000(ADAFRUIT_CC3000_CS, ADAFRUIT_CC3000_IRQ, ADAFRUIT_CC3000_VBAT,
                                         SPI_CLOCK_DIVIDER); // initializes the cc3000 device

Adafruit_CC3000_Client client; // wifi client instance.

// timeout values to determine when to lcose the connections
int dhcpTimeout = 60000; // 60000ms = 6 seconds
int connectTimeout = 15000; // 15000ms = 15 seconds 
int responseTimeout = 15000; // 15000ms = 15 seconds

int currentTemperature;
int sheetCounter = 1;
int getCounter = 0;

uint32_t ip;

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature. 
DallasTemperature sensors(&oneWire);

// just a function prototype
void http_request();

void setup(void) {
  Serial.begin(115200); // 115200 baud serial connection for fast text printing
  Serial.println(F("KASICH 2016"));

  Serial.print(F("Checking wiring..."));
  if(!cc3000.begin()) {
    failHang();
  }

  Serial.print(F("OK\r\nDeleting old connection profiles..."));
  if(!cc3000.deleteProfiles()){
    failHang();
  }

  Serial.println(F("OK\r\nConnecting to Access Point..."));
  if (!cc3000.connectToAP(WLAN_SSID, WLAN_PASS, WLAN_SEC_WPA2)) {
      failHang();
    }

  Serial.print(F("OK\r\nRequesting DHCP..."));
  for(int t=millis(); !cc3000.checkDHCP() && ((millis() - t) < dhcpTimeout); delay(100))
  {
    Serial.println("Attempting");
  }
  if(!cc3000.checkDHCP()) {
    failHang();
  }
  Serial.print(F("OK\r\nAttempting to resolve maker.ifttt.com..."));

  ip = 0;
  
  // find out maker.ifttt.com's ip address
  while (ip == 0) {
    if(!cc3000.getHostByName(BEEG, &ip)) {
      Serial.println(F("Coudln't resolve maker.ifttt.com!"));
    }
    delay(500);
  }

  Serial.println(F("Resolved maker.ifttt.com"));
}

void loop() { 
  delay(1800000); //delay 1800000s == 30 minutes between GET requests.
  
  // create a new sheet weekly
  if (getCounter > 0 && (getCounter % 336 == 0)) {
    sheetCounter += 1;
  }
  
  Serial.print(F("Requesting temperatures......"));
  sensors.requestTemperatures(); // Send the command to get temperatures
  Serial.println(F("DONE"));
  currentTemperature = sensors.getTempCByIndex(0); // poll sensor serial for temperature value in celsius
  Serial.print(F("About to record temperature value: ")); Serial.println(currentTemperature);
  http_request(IFTTT_KEY, TEMP_TRIGGER); // send the http request

  delay(1000);
  
  if (currentTemperature < 13 || currentTemperature > 26) { 
    http_request(IFTTT_KEY, ALARM_TRIGGER); // sends IFTTT request to send Dr. Savage a push notification if temperature gets too extreme
 }
 
}

void failHang() {
  Serial.print(F("FAILURE"));
  while(1);
}

void http_request(char* key, char* trigger) {
  Adafruit_CC3000_Client www;
  char get_url[500];
  sprintf(get_url, "/trigger/%s/with/key/%s?value1=%d&value2=%d", trigger, key, currentTemperature, sheetCounter); // copies url to the get_url 

  Serial.println("Opening TCP connection with ten second timeout.");
  int t = millis();
  do {
     cc3000.connectTCP(ip, 80);
  }
  while ((!www.connected()) && ((millis() - t) < 10000)); // 10s timeout
  
  // just sends the request with HTTP protocol
  if (www.connected()) {
    www.fastrprint(F("GET "));
    www.fastrprint(get_url);
    www.fastrprint(F(" HTTP/1.1\r\n"));
    www.fastrprint(F("Host: ")); www.fastrprint(BEEG); www.fastrprint(F("\r\n"));
    www.fastrprint(F("\r\n"));
    www.println();
    Serial.println(F("Sent GET request."));
  } 
  
  else {
    Serial.println(F("Connection failed"));    
    return;
  }
  // closes the TCP connection to maker.ifttt.com and stops the device
  Serial.println(F("\n\nClosing client stream"));
  www.close();
  www.stop();
}