RadarWrench Say hello

Season One · Building in public

RadarWrench

Find the signal. Prove the change.

A passive-first vehicle observability project for curious owners, makers, and researchers who would rather measure than guess.

See the method View build notes
BENCH / EXP-001 OBSERVING
0x2A5 04
Now on the bench Core pipeline is running.
Capture
CAN + CAN FD
Transport
Physical bench proven
Hardware
Passive observer online
Next proof
First passive vehicle capture

The learning loop

One controlled action at a time.

RadarWrench is exploring a more approachable path from raw vehicle traffic to evidence you can understand and verify.

  1. 01

    Observe

    Listen to what the vehicle already says and preserve the raw evidence.

  2. 02

    Mark

    Perform one deliberate action and place a precise marker in the timeline.

  3. 03

    Discover

    Rank what changed, repeat the experiment, and build confidence from proof.

Measured, not imagined

Turn a wall of frames into a useful question.

The first experiment asks a simple thing: when a known action happens, which bits change consistently enough to deserve a closer look?

Observed MARK Candidate
EXP-001 / TRIAL 03 relative-monotonic-ns
0x2A5 #1
0x188 #7
0x3D1 #12
Candidate: byte 3 · bit 2 3 / 3 trials

The first rule

Listen first.

Season One begins with passive observation and isolated bench experiments. It does not begin with arbitrary commands on a live vehicle.

  • Raw evidence stays inspectable
  • Experiments stay repeatable
  • Claims stay inside what has been demonstrated

Field notes

Season One build log

The project is early. The receipts are real.

Safety

The physical recorder now fails closed.

The bounded SocketCAN capture path verifies listen-only mode before recording and preserves a compact safety-evidence sidecar with every session.

Verified
Hardware

Classic CAN and CAN FD cross the physical bench.

Two isolated Raspberry Pi channels exchange known frames at production bitrates with clean counters, stable interface names, and no power warnings.

Verified
Observer

The PCAN listens without joining the conversation.

A galvanically isolated PCAN-USB FD captures known classic and FD traffic in kernel-reported listen-only mode while transmit counters remain unchanged.

Verified
Experiment

A known signal is discovered from repeatable synthetic trials.

The first end-to-end experiment preserves raw events, replays them, and ranks the intended bit consistently across three trials.

Verified

Follow the proof

The vehicle capture is next.

The bench is proven and the receive-only guardrails are in place. The next result will come from a bounded, parked-vehicle observation with the engine off.

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