Thanks for these clarifications! So it's really a simpler version of SeedSigner basically. Pity it has no persistent (secure) storage, I assumed it had.
Yeah, I think jreesun first saw SeedSigner DIY device, and than he came up with an idea to use M5StickV to create his own version of signing device.I think he did a great job with that fast QR codes and simple menus.
Didn't an M5Stack with secure element exist? I think it does, but without camera.
There is only one ESP32 device with secure element same like in ColdCard, Bitbox02 and Passport, that is M5Stack Core2 ESP32 AWS, but it's more expensive and there is no camera included.You always have tradeoffs with this devices.
I think it should be possible to get an SPI based secure chip and hook it up to the M5StickV with some wires, in theory
I'll order a stick and see what's possible when I find the time
