Our company has begun development on an embedded app for Shopify POS that integrates directly with a weight scale.
If you would be interested in such an app, please fill out our interest form here to be notified: https://forms.gle/cKmac5xVp1eJtfaC6
Hi Shopify community,
Since this post, we have completed 2 such apps that help for this use case:
For scanning random weight / price-embedded barcodes: https://apps.shopify.com/scan-price-embedded-barcodes
For selling products by weight and also integrating a weigh scale: https://youtu.be/N_dDjoPVC54 (still in beta, for now please send a PM if you are interested in trying it).