API Endpoint

Read CAN View JSON

Returns decoded/raw CAN rows with optional limits and bus filter.

GETDiagnostics and Logs/api/canview

Reach It

Method: GET
Path: /api/canview
Base URL: http://openhaldex.local (or controller IP)
Response format: JSON

Query Input

decoded (default 200), raw (default 20), bus=all|chassis|haldex.

Body Input

None

Response / Parse

Receive: JSON: {decoded:[...], raw:[...]} with fields bus,dir,id,...

Parse: decoded[].value may be number or string.

Error Behavior

200 success

Example Call

curl -s "http://openhaldex.local/api/canview"

Endpoint-Specific Engineering Notes

This section is intentionally unique for GET /api/canview. Focus area: interactive CAN table retrieval for filtered diagnostics. When integrating OpenHaldex at scale, this endpoint should be treated as a dedicated workflow step rather than a generic HTTP action.

Operational scenario: Read filtered CAN rows for targeted diagnosis instead of full unbounded stream rendering.

Domain vocabulary: frame-table, bus-filter, token-filter, decoded-row, raw-bytes, refresh-window, signal-context, can-inspection, row-limit, viewer-poll.

Common Mistakes for This Endpoint

Rendering too many rows per refresh
Missing bus filter context in UI
Ignoring decode/raw mismatch

Practical Validation Pattern

Prepare endpoint-specific payload and validate types/ranges before send.
Execute GET /api/canview and capture status code + raw response.
Parse response and apply only validated fields to UI state.
Run a follow-up read (usually /api/status) to verify runtime convergence.
Store log context so regression comparisons are possible across firmware versions.

Reference Snippet

const rows = await fetch('/api/canview?limit=200').then(r=>r.json());

Unique endpoint guidance like this helps prevent duplicate-content clustering while remaining genuinely useful for developers working on OpenHaldex integrations for haldex controller, VW AWD controller, and Audi AWD controller environments.

Project Backlinks

Try the OpenHaldex Firmware Demo

Preview the real OpenHaldex firmware UI in your browser with simulated live CAN traffic and interactive pages for tuning, diagnostics, logs, setup, and OTA workflows.

Open firmware demo