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name: bitcoin-hardware-specter-diy description: | Specter DIY: open-source HW wallet built on STM32 dev board with display. By the Specter team. USE WHEN: building Specter DIY, evaluating DIY HW signing options. allowed-tools: Read, Grep, Glob

Specter DIY

DIY hardware wallet by the Specter team (Crypto Advance). Built on STM32 dev boards with attached displays.

Hardware (DIY)

• STM32F469-Discovery board (~$80).
• Custom firmware via PlatformIO.
• USB connection.

Operation

• Standard PSBT signing flow via Specter Desktop.
• Single-coin (Bitcoin) signing.
• Multisig coordination via Specter Desktop.

Compared to other DIYs

Aspect	Specter DIY	SeedSigner	Krux
Hardware	STM32 dev board	Raspberry Pi	Sipeed M5StickV
Cost	Mid ($80)	Low ($60)	Low ($50)
Statelessness	Stateful	Stateless	Stateless
Coordination	Specter Desktop	Multiple wallets	Multiple wallets
Tinkering required	Some	Some	Some

Use cases

• Specter Desktop ecosystem users wanting matching hardware.
• STM32 enthusiasts preferring real hardware-level dev.

Limitations

• Smaller community than SeedSigner / Krux.
• STM32 hardware availability sometimes limited.

See also

• seedsigner/SKILL.md
• krux/SKILL.md
• ../infrastructure/specter-desktop/SKILL.md