Warning: Undefined variable $printer in C:\xampp\htdocs\siscolasmdp\vendor\mike42\escpos-php\example\rawbt-receipt.php on line 108

Fatal error: Uncaught Error: Class "item" not found in C:\xampp\htdocs\siscolasmdp\vendor\mike42\escpos-php\example\rawbt-receipt.php:17 Stack trace: #0 {main} Next Error: Call to a member function close() on null in C:\xampp\htdocs\siscolasmdp\vendor\mike42\escpos-php\example\rawbt-receipt.php:108 Stack trace: #0 {main} thrown in C:\xampp\htdocs\siscolasmdp\vendor\mike42\escpos-php\example\rawbt-receipt.php on line 108

Notice: Print connector was not finalized. Did you forget to close the printer? in C:\xampp\htdocs\siscolasmdp\vendor\mike42\escpos-php\src\Mike42\Escpos\PrintConnectors\RawbtPrintConnector.php on line 49