ferrite-sdkFirmware Observability for Cortex-M

Capture crashes, metrics, and logs on embedded devices. Upload over any transport. Zero alloc. Zero panic.

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HardFault Capture

Automatically captures all Cortex-M registers, CFSR/HFSR fault status, and a 64-byte stack snapshot on every HardFault. Stored in retained RAM, uploaded after reboot.

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Metrics & Histograms

Record counters, gauges, and histograms with a fixed-capacity ring buffer. No heap allocation. Oldest entries are evicted when the buffer fills.

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Structured Trace Logs

Captures defmt log output into a circular trace buffer. Frames are uploaded as binary fragments and decoded server-side.

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Reboot Reason Tracking

Detects and records why the device rebooted — power-on, watchdog, fault, pin reset, brownout, software request, and more.

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Transport Agnostic

Implement a single trait (Rust) or callback (C) to send chunks over UART, BLE, LoRa, HTTP, USB CDC, or anything else.

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Tiny Footprint

Default configuration: ~1.7 KB RAM, ~6 KB flash. No alloc, no std, no panics in production paths.