Tiny QR Code Reader from Useful Sensors

RE: Tiny QR Code Reader from Useful Sensors

DAB — Tue, 07 Nov 2023 20:37:37 GMT

Nice little unit.

RE: Tiny QR Code Reader from Useful Sensors

scottiebabe — Tue, 07 Nov 2023 17:59:49 GMT

RE: Tiny QR Code Reader from Useful Sensors

mp2100 — Sun, 05 Nov 2023 23:53:18 GMT

I’m surprised the hard limit for a QR text is 254 bytes. The rp2040 has a lot of RAM. Maybe there’s a limitation somewhere else in the board.

RE: Tiny QR Code Reader from Useful Sensors

genebren — Sun, 05 Nov 2023 20:37:08 GMT

Interesting blog. I can see a lot of value to having a light weight (code, processing time and pin count) solution to reading QR codes. Be able to send out an image of the QR code allowing a customer to reconfigure a product or unlock a feature for a product with a limited communication path would be pretty cool.

RE: Tiny QR Code Reader from Useful Sensors

shabaz — Sun, 05 Nov 2023 19:53:57 GMT

Interesting! Could put two RP2040's facing each other and they can communicate away with QR codes. [mention:959a497a63d746d9a01748d7e7667d5e:f7d226abd59f475c9d224a79e3f0ec07]

It seems quite speedy from the video. A speaker for beeping on successful scan could be useful too.

Quite a few years ago I needed a code scanner system for a commercial inventory system, and we used an off-the-shelf scanner, but it was actually quite limiting due to the traditional interface on it (I think it was RS-232 or might have been USB HID keyboard). There'a a lot to be said for a code scanner that can have any arbitrary interface configured/programmed.