I am opening this thread to help people out who are looking for a webcam that can recognize Blockstream Jade’s QR codes so that it works air-gapped with Sparrow on a PC.

This includes xpub and PSBT export (Sparrow as watch-only) and signing transactions.

I couldn’t find any specifc info on the web which camera would work.

Test results:

1. With my cheapo webcam (720p, fixed focus), Sparrow (Windows) did not recognize Jade’s QR codes.

2. In contrast, with the Logitech c920e, Sparrow had no problems recognizing Jade’s QR codes and everything worked just fine.

The main thing seems to be that the c920e has auto focus.

My cheapo cam only produces a sharp image at a specific distance, which appears to be too far away for Jade’s small QR codes.

Given they are of a similar quality and also have auto-focus, I believe (haven’t tested them), the Logitech c920s, c920x,  c922, and c930 could work as well.

Do you have experience with these and other webcams (both auto-focus and fixed focus) and setups?

I’d be glad if you could chime in.

Many thanks.