v2session
SkyV2X · field tool

Read the whole exchange, checked against the spec.

Point v2session at a field capture of V2X traffic and get the session back — where the vehicles went, what they warned about, how the signals ran, and where the exchange drifts from ETSI. A session, not a packet list.

CAMCPMDENM SPATEMMAPEMSREM 0s3s6s 9s

Session log — every message on the wire, one ink stroke per channel over the capture's timeline.

What it reads

Trajectories

Each vehicle's path on a map, drawn from what it broadcast about itself, with speed over the run.

Events

Hazard and roadworks warnings: what was reported, where it was relevant, and for how long.

Perception

What the roadside and vehicles sensed around them, and how that collective picture lines up with the vehicles' own positions.

Signals

Traffic-light phases over time and the intersection geometry they run on, read straight off the air.

Security

Whether the exchange is signed, by what kind of certificate, and which services that certificate is allowed to send.

Conformance

A first read of where the session drifts from the ETSI rules: rates, ranges, missing pairs, unsigned traffic.

A session, not packets

A packet tool shows you frames. A field engineer needs the exchange: who was on the air, where they went, what they told each other, and whether any of it broke the rules. v2session reads the capture end to end and hands back that picture — on a map, on a timeline, and against the spec.

It runs from a single file and produces a single self-contained report you can open offline or hand to a colleague. Field captures stay on your machine.

Built on the ETSI C-ITS message set — CAM · DENM · CPM · SPATEM · MAPEM · IVIM · VAM. Part of the SkyV2X stack, alongside v2json.