I am an expert in software development in .NET platform, C # and VB, for platform desktop, web and mobile.
In Peru work with ZKteco, Zksoftware, Anviz brand, and conducted programs for their watches and sensors attendance control and access, fingerprint, facial, card, etc.
I also work with other brands such as Motorola, Pidion, Unitech, Zebra and Argox, .net programs to integrate its readers equipment, terminals and printers handhelp barcode.
I can give solution to your problem quickly.
Best regards
PS: send the model and brand of terminal handhelp.