Opencart send email in custom Script

I have a script in my opencart, made by myself, and want to make it send an email, but I think that when I try to get email parameters they return null.

Here is my code:

    $email_to = "";
    $config = new Config();
    $mail = new Mail();

    $mail->protocol = $config->get('config_mail_protocol');
    $mail->parameter = $config->get('config_mail_parameter');
    $mail->hostname = $config->get('config_smtp_host');
    $mail->username = $config->get('config_smtp_username');
    $mail->password = $config->get('config_smtp_password');
    $mail->port = $config->get('config_smtp_port');
    $mail->timeout = $config->get('config_smtp_timeout');            
    $mail->setSubject("test send mail");
    $mail->setText("test message body text");

When I try calling: echo $config->get('config_mail_protocol'); it returns null.


Do not create new instances of Config but just simply call

$email_to = "";
$mail = new Mail();

$mail->protocol = $this->config->get('config_mail_protocol');
$mail->parameter = $this->config->get('config_mail_parameter');
$mail->hostname = $this->config->get('config_smtp_host');
$mail->username = $this->config->get('config_smtp_username');
$mail->password = $this->config->get('config_smtp_password');
$mail->port = $this->config->get('config_smtp_port');
$mail->timeout = $this->config->get('config_smtp_timeout');            
$mail->setSubject("test send mail");
$mail->setText("test message body text");


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