‚#Krux is open-source firmware that enables anyone to build their own #Bitcoin signing device via off-the-shelf parts.
It runs on Kendryte K210 devices such as the M5StickV and Maix Amigo, turning them into #airgapped devices that can sign transactions for multisignature and single-signature wallets.‘
https://www.nobsbitcoin.com/krux-v24-07-0/