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cansub-knowledge

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更新时间2026年6月22日 12:37

Authoritative reference for the CSS Electronics CANsub product family (CANsub.2 and CANsub.4 CAN / CAN FD streaming interfaces). Use whenever a task needs accurate CANsub facts: hardware specs, the REST / WebSocket API, bit-timing, hardware filters, transmit sequences, connectors / pin-outs, firmware, certificate install; higher-layer protocols (OBD2, UDS, J1939, NMEA 2000, CANopen, CCP/XCP); the software tools (webCAN, SavvyCAN, PlotJuggler); or the python-can-cansub Python integration. Also consult it when another skill (e.g. cansub-reverse-engineering) needs CANsub context. Bundled doc snapshots live in assets/.

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CSS-Electronics

CSS-Electronics/can-bus-reverse-engineering-skills

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CANsub knowledge

Bundled, authoritative documentation for the CSS Electronics CANsub family (CANsub.2 / CANsub.4 CAN / CAN FD streaming interfaces). Prefer these snapshots over web search or training-data recall.

How to use this skill

The reference material is in assets/ (relative to this skill directory). These files are large, so don't read them whole — Grep for the relevant term first (e.g. an endpoint name, bit-timing, mDNS, a protocol), then Read only the matching section.

File	Scope	Use it for
`assets/cansub_intro_llm.txt`	Getting started / higher layer	webCAN configuration, protocol-specific guidance (OBD2, UDS, J1939, NMEA 2000, CANopen, CCP/XCP), streaming troubleshooting, and the software/API tool ecosystem (webCAN, python-can-cansub, SavvyCAN, PlotJuggler, custom REST/WebSocket apps)
`assets/cansub4_llm.txt`	CANsub.4 technical manual	The authoritative device / API reference: hardware specs, REST API, WebSocket API, firmware, bit-timing, connectors, display, device label
`assets/cansub_openapi.json`	REST API (OpenAPI 3.0 spec)	Exact endpoints, request/response schemas, and parameters for device config + monitoring — use when building or debugging a REST client
`assets/python-can-cansub-README.md`	python-can-cansub package	The python-can integration: mDNS auto-discovery, hardware filters, broadcast manager, webCAN-compatible CSV logging, and standard python-can tools

CANsub.2 vs CANsub.4

Only the CANsub.4 manual is bundled. The CANsub.2 is identical except:

Front connector: 2x DB9 instead of 1x DB25.
CAN channels: 2x CAN instead of 4x CAN (so the channel index range is 0-1, not 0-3); adjust any channel-count-dependent API field accordingly.

For a CANsub.2 question, read cansub4_llm.txt and apply those two deltas. Don't invent other differences.

Related skills in this repo

cansub-reverse-engineering — uses the CANsub (via python-can-cansub) to capture and reverse engineer CAN signals. It refers here for device / API / protocol details.

同仓库更多 Skills

同仓库

cansub-reverse-engineering

CSS-Electronics/can-bus-reverse-engineering-skills

Reverse engineer / decode CAN bus signals: find which CAN ID, byte and bit encode a real-world quantity (vehicle speed, engine RPM, state-of-charge, coolant temp, throttle, door lock, ...) and derive its start-bit, length, endianness, scale and offset into a DBC. A deterministic chain of Python scripts (survey -> correlate -> bitsearch -> build_dbc -> verify) replaces "a human watches the screen to spot correlations". Works three ways: (1) OFFLINE - decode a signal from an EXISTING recorded log the user already has (a CAN + OBD2 log, an MF4/CANedge log, or a webCAN CSV) using a separately decodable reference such as an OBD2 PID (engine RPM, vehicle speed, coolant temp) or a CSS Electronics GPS source (CANmod.gps, or a CANedge's internal GPS/IMU on CAN9 - bundled DBCs, e.g. GPS speed as a reference for proprietary vehicle speed) - NO hardware needed; (2) LIVE - capture from a CSS Electronics CANsub interface with a human-supplied reference; or (3) VISION - the user has a CAN log plus a VIDEO of a display (dash

2026-06-22127

combine-dbc

CSS-Electronics/can-bus-reverse-engineering-skills

Combine multiple individual single-signal DBC files into one combined DBC at the application level. Use whenever the user wants to merge/combine/assemble several per-signal .dbc files (e.g. produced by the cansub-reverse-engineering skill under decoding-output/<application>/<signal>/<signal>.dbc) into a single application-wide DBC such as decoding-output/<application>/<application>.dbc. Re-runnable at any time as more signals are decoded. Triggers on phrasings like "combine the DBCs", "merge my signal DBCs", "build the combined/application DBC", "make one DBC from these".

2026-06-22127

name	cansub-knowledge
description	Authoritative reference for the CSS Electronics CANsub product family (CANsub.2 and CANsub.4 CAN / CAN FD streaming interfaces). Use whenever a task needs accurate CANsub facts: hardware specs, the REST / WebSocket API, bit-timing, hardware filters, transmit sequences, connectors / pin-outs, firmware, certificate install; higher-layer protocols (OBD2, UDS, J1939, NMEA 2000, CANopen, CCP/XCP); the software tools (webCAN, SavvyCAN, PlotJuggler); or the python-can-cansub Python integration. Also consult it when another skill (e.g. cansub-reverse-engineering) needs CANsub context. Bundled doc snapshots live in assets/.
allowed-tools	["Read","Grep","Glob"]

CANsub knowledge

Bundled, authoritative documentation for the CSS Electronics CANsub family (CANsub.2 / CANsub.4 CAN / CAN FD streaming interfaces). Prefer these snapshots over web search or training-data recall.

How to use this skill

File	Scope	Use it for
`assets/cansub_intro_llm.txt`	Getting started / higher layer	webCAN configuration, protocol-specific guidance (OBD2, UDS, J1939, NMEA 2000, CANopen, CCP/XCP), streaming troubleshooting, and the software/API tool ecosystem (webCAN, python-can-cansub, SavvyCAN, PlotJuggler, custom REST/WebSocket apps)
`assets/cansub4_llm.txt`	CANsub.4 technical manual	The authoritative device / API reference: hardware specs, REST API, WebSocket API, firmware, bit-timing, connectors, display, device label
`assets/cansub_openapi.json`	REST API (OpenAPI 3.0 spec)	Exact endpoints, request/response schemas, and parameters for device config + monitoring — use when building or debugging a REST client
`assets/python-can-cansub-README.md`	python-can-cansub package	The python-can integration: mDNS auto-discovery, hardware filters, broadcast manager, webCAN-compatible CSV logging, and standard python-can tools

CANsub.2 vs CANsub.4

Only the CANsub.4 manual is bundled. The CANsub.2 is identical except:

Front connector: 2x DB9 instead of 1x DB25.
CAN channels: 2x CAN instead of 4x CAN (so the channel index range is 0-1, not 0-3); adjust any channel-count-dependent API field accordingly.

For a CANsub.2 question, read cansub4_llm.txt and apply those two deltas. Don't invent other differences.

Related skills in this repo

cansub-reverse-engineering — uses the CANsub (via python-can-cansub) to capture and reverse engineer CAN signals. It refers here for device / API / protocol details.