/* WiFi-enabled water level sensor
by John Hart farmgeek@gmail.com 2011.
This code is based on the work of many others. All errors are mine, 
any good code, theirs. Attributions as noted */

/* Please feel free to use, modify or share this code 
without restriction. If you'd like to credit me in your 
derivatives, that'd be nice too. */

/*Original sensor code by Dave ten Have */


#include <WiFly.h>
#include "Settings.h"
#include <avr/wdt.h>

Client client(server, port_number);

void setup() {
    
}

void loop() {
  
  pinMode(6, OUTPUT);   // Set digital pin 6 as OUTPUT to power WiFly shield VIN Pin
  digitalWrite(6,HIGH); // trigger relay to power WiFly shield VIN
  
  delay(200); //allow WiFly time to boot
  
  wdt_enable(WDTO_8S); //start watchdog set for max 8 seconds
  
  /*Serial.print statements used for debugging - can be commented out */
  
  Serial.begin(9600);
  Serial.println("Starting ...");
  Serial.println(request_url());
  
  delay(100);
  Serial.println("Taking reading...");
  int reading = gauge_reading();
  Serial.println("-- data collected");
  Serial.println(reading);
  send_data(reading);
  
  wdt_disable(); //turn off watchdog timer - if sketch gets this far it hasn't hung
  
  delay(100);
  
  digitalWrite(6,LOW); // Power down WiFly
  
  //delay(295000);
  delay(57000); // 1 minute minus delays
}

void send_data(int reading) {
  
  Serial.println("-- -- sending data");
  WiFly.begin(); 
  Serial.println("-- -- wifly online");
  if (WiFly.join(ssid, passphrase)) {
    Serial.println("-- -- -- joined");
    
    String request = "GET " + request_url() + "?data=" + String(reading) + " HTTP/1.0";
    client.connect();  
    Serial.println(request);
    client.println(request);
    client.println();
    delay(100);
    client.read();
    
    client.stop(); 
    Serial.println("-- -- -- data sent");
  }  
}

String request_url(){
  String url_template = "http://" + String(server) + "/record/" + String(sensor_GUID);
  return url_template;
}