function kirimGCM($data, $otp, $pid, $callbackaddr)
{
    //mengirim pesan ke device (Pesan + AppID + PID + OTP)
    $data["otp"] = $otp;
    $data["pid"] = $pid;
    unset($data["CAwebsigncallback"]);
    $gcpm = new GCMPushMessage($data["regid"]);
    $gcpm->fillDataDocSign($data, $callbackaddr);
    $response = $gcpm->sendGoogleCloudMessage();
    //echo "Response:".$response."\n";
}