Barcode scanner to website

Does anyone know how I can use an external scanner, probably Bluetooth linked to a phone/ipad that when scanned it would load a website up? I know I can do this with a phone camera which does this automatically but I run a cafe and give out QR codes that when scanned display an offer. I wanted to make it abit more professional.So I want to scan the code with a gun and this loads the offer up on a URL Apologies if not right area, struggling to find one specific 😂
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