Ric3wi6w

1<?php
2// Define your zip code and openweather API key here:
3  $zipcode = "12345";
4  $apikey = "12345abc12345abc";
5
6// Define where the sh files are located here, include trailing /:
7  $filedir = "/home/pi/freezer/";
8
9// Define temperatures you want the plug to turn off and on at
10// E.g. if you turn the plug off at 0 and the temp is -1, it'll turn off and stay off until
11// the temperature gets above the temp_to_turn_on_at.
12  $temp_to_turn_off_at = 0;
13  $temp_to_turn_on_at = 10;
14
15// Read the current temperature from openweathermap and convert it to F:
16  $query = "http://api.openweathermap.org/data/2.5/weather?zip=".$zipcode."&appid=".$apikey;
17  $json = file_get_contents($query);
18  $json_array = json_decode($json);
19  $main = $json_array->main;
20  $temp_k = $main->temp;
21  $temp_f = k_to_f($temp_k);
22
23  $final_result = "NO CHANGE WAS MADE AT ".$temp_f."F";
24  if(is_numeric($temp_f)) {
25
26// A valid temp was found from openweathermap, check the plug status and determine whether to change it:
27    $plug_status = plug_status($filedir);
28    if($plug_status == "ON" || $plug_status == "OFF") {
29      if($temp_f > $temp_to_turn_on_at && $plug_status == "OFF") {
30        shell_exec("sh ".$filedir."plugon.sh");
31        $final_result = "PLUG WAS TURNED ON AT ".$temp_f."F";
32      }
33      if($temp_f < $temp_to_turn_off_at && $plug_status == "ON") {
34        shell_exec("sh ".$filedir."plugoff.sh");
35        $final_result = "PLUG WAS TURNED OFF AT ".$temp_f."F";
36      }
37    } else {
38      $final_result = "COULD NOT DETERMINE PLUG STATUS!";
39    }
40  } else {
41    $final_result = "COULD NOT DETERMINE CURRENT TEMPERATURE!";
42  }
43
44  $current_timestamp = date("Y-m-d H:i:s");
45  $log_entry = $current_timestamp." - ".$final_result;
46  echo log_result($filedir."log.txt", $log_entry);
47
48function log_result($filename, $log_entry) {
49// Simple function to write a log entry to a log file, return an error if it couldn't be
50// written to, probably need to create the file and chmod it first.
51  $file = fopen($filename, "a");
52  if($file == FALSE) {
53    return "COULD NOT OPEN LOG FILE!\r\n\r\n".$log_entry;
54  } else {
55    fwrite($file, $log_entry."\r\n");
56    fclose($file);
57    return $log_entry;
58  }
59}
60
61function plug_status($filedir) {
62// Read the current on/off state of the plug and return it as "ON" or "OFF":
63  $status = shell_exec("sh ".$filedir."plugstatus.sh 2<&1");
64  if(strpos($status, "ON")>0) { $result = "ON"; }
65  if(strpos($status, "OFF")>0) { $result = "OFF"; }
66  return $result;
67}
68
69function k_to_f($temp) {
70// Thanks to: http://scottnelle.com/592/convert-openweathermaps-kelvin-temperatures-php/
71    if ( !is_numeric($temp) ) { return false; }
72    return round((($temp - 273.15) * 1.8) + 32);
73}
74?>
75