Warning: fopen(/dev/ttyACM0): failed to open stream: Permission denied in /home/idshop/public_html/test/vendor/mike42/escpos-php/src/Mike42/Escpos/PrintConnectors/FilePrintConnector.php on line 35

Fatal error: Uncaught Exception: Cannot initialise FilePrintConnector. in /home/idshop/public_html/test/vendor/mike42/escpos-php/src/Mike42/Escpos/PrintConnectors/FilePrintConnector.php:37 Stack trace: #0 /home/idshop/public_html/test/vendor/mike42/escpos-php/example/customer-display.php(20): Mike42\Escpos\PrintConnectors\FilePrintConnector->__construct('/dev/ttyACM0') #1 {main} thrown in /home/idshop/public_html/test/vendor/mike42/escpos-php/src/Mike42/Escpos/PrintConnectors/FilePrintConnector.php on line 37