Hi Jitendra,

>Hello Experts
>I have a couple of questions. One of our clients have bought a POS machine with the cash drawer and a pole display to display the gross amount. To display the gross amount i have to send a .txt file to the com port. My question is how to do it and how to send the Hex code to the com port to open the drawer.
>
>Thanks

Often, this machines has a DLL to interface it. See the vendor's manual or web site, maybe there you can to find something that will help you.
Good luck!