--- a/calls.json.php
+++ b/calls.json.php
@@ -1,66 +1,70 @@
 <?php
 include('common.inc.php');
-function getSensorValuesByHour($sensorID, $timeFrom, $timeTo) {
+function getTGIDValuesByHour($TGID, $timeFrom, $timeTo) {
     global $conn;
     $sth = $conn->prepare( 'select min(call_timestamp) as time, count(*), min(length), max(length), avg(length), stddev(length) from recordings
             group by tgid, date_trunc(\'hour\', call_timestamp) order by time');
 
-    $sth->execute( Array($sensorID, $timeFrom, $timeTo));
-    return  $sth->fetchAll();
+    $sth->execute( );
+    //Array($TGID, $timeFrom, $timeTo)
+        return  $sth->fetchAll();
+
+
 }
 
-function getSensorValuesByDay($sensorID, $dayFrom, $dayTo) {
+function getTGIDValuesByDay($TGID, $dayFrom, $dayTo) {
     global $conn;
     $sth = $conn->prepare('select min(time) as time, min(value), max(value), avg(value), stddev(value) from sensor_values where sensor_id = ?
             group by sensor_id, date_trunc(\'day\', time) order by time');
 
-    $sth->execute( Array($sensorID));
+    $sth->execute( Array($TGID));
     return  $sth->fetchAll();
 }
-function getSensorDataYears($sensorID, $timeFrom, $timeTo) {
+function getTGIDDataYears($TGID, $timeFrom, $timeTo) {
     global $conn;
     $sth = $conn->prepare("select distinct extract('year' from call_timestamp) as year from recordings where tgid = ? order by year");
 
-    $sth->execute(Array($sensorID));
+    $sth->execute(Array($TGID));
     return  $sth->fetchAll();
 }
 
-function getSensorDataMonths($sensorID, $timeFrom, $timeTo) {
+function getTGIDDataMonths($TGID, $timeFrom, $timeTo) {
     global $conn;
     $sth = $conn->prepare("select distinct extract('month' from call_timestamp) as month, extract('year' from call_timestamp) as year from recordings where tgid = ?  order by year, month");
 
-    $sth->execute(Array($sensorID));
+    $sth->execute(Array($TGID));
     return  $sth->fetchAll();
 }
 
-function getSensorDataDays($sensorID, $timeFrom, $timeTo) {
+function getTGIDDataDays($TGID, $timeFrom, $timeTo) {
     global $conn;
     $sth = $conn->prepare("select distinct extract('day' from call_timestamp) as day, extract('month' from call_timestamp) as month, extract('year' from call_timestamp) as year from recordings where tgid = ?  order by year,month,day");
 
 
-    $sth->execute(Array($sensorID));
+    $sth->execute(Array($TGID));
     return  $sth->fetchAll();
 }
-$action = $_REQUEST['action'];
-    $sensorID = $_REQUEST['tgid'];
-$timefrom = $_REQUEST['from'];
-$timeto = $_REQUEST['to'];
-if ($action = "data_description") {
+$action = (isset($_REQUEST['action']) ? $_REQUEST['action'] : '');
+$TGID = (isset($_REQUEST['tgid']) ? $_REQUEST['tgid'] : '');
+$timefrom = (isset($_REQUEST['from']) ? $_REQUEST['from'] : '');
+$timeto = (isset($_REQUEST['to']) ? $_REQUEST['to'] : '');
+
+if ($action == "data_description") {
     $timefrom = strtotime($timefrom);
     $timeto = strtotime($timeto);
-    $years = getSensorDataYears($sensorID, $timefrom, $timeto);
+    $years = getTGIDDataYears($TGID, $timefrom, $timeto);
 
-    $months = getSensorDataMonths($sensorID, $timefrom, $timeto);
-    $days = getSensorDataDays($sensorID, $timefrom, $timeto);
+    $months = getTGIDDataMonths($TGID, $timefrom, $timeto);
+    $days = getTGIDDataDays($TGID, $timefrom, $timeto);
 
     echo json_encode(Array("years" => $years, "months" => $months, "days" => $days
                     ));
 }
 
 
-if ($action = "graph") {
-    $values = getSensorValuesByHour($sensorID, $timefrom, $timeto);
-    $label = $sensorID;
+if ($action == "graph") {
+    $values = getTGIDValuesByHour($TGID, $timefrom, $timeto);
+    $label = $TGID;
     $data = Array();
     $tzoffset = get_timezone_offset("UTC");
     foreach ($values as $value) {