nSealr Hardware

Open hardware reference designs, BOMs, validation contracts, and production notes for nSealr signer and secure-device hardware.

Feature targets and current status are defined in nSealr/specs vectors/features/signer-feature-matrix-v0.json. This repository provides hardware artifacts for those families; it must not create separate signer-family behavior outside the shared specs contract model.

Current Hardware Lines

• ESP32-S3 USB/NIP-46 signer reference requirements.
• ESP32-S3 stateless QR vault requirements and accepted display/camera devkit targets.
• Raspberry/Pi stateless QR vault kit requirements, OS profile, BOM, and smoke report templates.
• TROPIC01 Universal Secure Device: the only active custom hardware product direction in this repository.

TROPIC01 Universal Secure Device

The custom hardware target is a single compact portrait board for open-source projects that need a TROPIC01-based secure element device.

Core product decisions:

• TROPIC01 primary open secure element.
• STM32U5 host MCU.
• OPTIGA Trust M class I2C second secure element.
• 2.4 inch portrait capacitive touch display.
• USB-C female receptacle only, centered on the bottom short edge.
• ST25R3916B NFC/RFID controller with a real tuned antenna path.
• LiPo connector and BQ24074-class power path.
• QSPI NOR flash.
• Two high side-actuated physical buttons.
• Hidden back-side pogo/test pads.
• No microSD slot.
• No BLE/WiFi/radio module in Rev A0.

Authoritative files:

• docs/superpowers/specs/2026-06-08-tropic01-universal-secure-device-design.md
• docs/superpowers/plans/2026-06-08-tropic01-universal-secure-device-implementation.md
• pcb/tropic01-universal-secure-device/requirements.json
• bom/tropic01-universal-secure-device.csv

Quality Baseline

Run the repository verification loop with:

make ci

or the hardware validator directly:

python3 scripts/validate_hardware.py
python3 -m unittest tests.test_validate_hardware -v

Layout

• pcb/: requirements and KiCad board design files.
• kits/: off-the-shelf kit requirements before custom PCB work.
• enclosures/: 3D case designs and mechanical notes.
• bom/: component lists and sourcing notes.
• reports/: manual hardware validation reports.
• templates/: validated report templates for future manual acceptance runs.
• docs/: architecture, testing, assembly, and security notes.

License

Hardware design files, PCB sources, BOMs, enclosure files, and assembly artifacts are released under CERN-OHL-P-2.0 unless a file says otherwise.