getNextScheduledEvent() public méthode

public getNextScheduledEvent ( $serial_number = null )
// Available: DUALFUEL_BREAKPOINT_ALWAYS_PRIMARY, DUALFUEL_BREAKPOINT_ALWAYS_ALT, or a temperature between -12°C and 9°C (10-50°F)
var_dump($success);
echo "----------\n\n";
sleep(1);
echo "Device information:\n";
$infos = $nest->getDeviceInfo();
jlog($infos);
echo "----------\n\n";
echo "Device schedule:\n";
// Returns as array, one element for each day of the week for which there has at least one scheduled event.
// Array keys are a textual representation of a day, three letters, as returned by `date('D')`. Array values are arrays of scheduled temperatures, including a time (in minutes after midnight), and a mode (one of the TARGET_TEMP_MODE_* defines).
$schedule = $nest->getDeviceSchedule();
jlog($schedule);
echo "----------\n\n";
echo "Device next scheduled event:\n";
$next_event = $nest->getNextScheduledEvent();
jlog($next_event);
echo "----------\n\n";
echo "Last 10 days energy report:\n";
$energy_report = $nest->getEnergyLatest();
jlog($energy_report);
echo "----------\n\n";
/* Helper functions */
function json_format($json)
{
    $tab = "  ";
    $new_json = "";
    $indent_level = 0;
    $in_string = false;
    $json_obj = json_decode($json);
    if ($json_obj === false) {