OMA LwM2M Expert Skill for Claude

A comprehensive OMA LwM2M (Lightweight Machine-to-Machine) skill that turns Claude into a senior IoT protocol engineer — covering all specification versions from v1.0 (2017) through v2.0 (anticipated 2026), the complete object/resource data model, all transport bindings, security architecture, and the surrounding implementation ecosystem.

What It Does

This skill gives Claude deep, standards-grounded expertise across the full OMA LwM2M ecosystem:

• All versions: v1.0, v1.0.2, v1.1, v1.1.1, v1.2, v1.2.1, v1.2.2, v2.0 (anticipated)
• Protocol stack: CoAP (RFC 7252), DTLS 1.2/1.3, TLS 1.2/1.3, OSCORE, SenML, CBOR
• All interfaces: Bootstrap, Registration, DM&SE, Information Reporting
• All transports: UDP, TCP, SMS, Non-IP (3GPP CIoT, LoRaWAN), MQTT, HTTP
• Security: PSK, RPK, x509, EST, OSCORE, DTLS CID (RFC 9146), session persistence
• Data model: Core objects (0-25), IPSO Smart Objects (3300+), OMNA registry, object versioning
• Implementation: Wakaama, Leshan, Anjay, Californium, Zephyr LwM2M, DTLS library comparison
• Deployment: Queue Mode, NB-IoT/LTE-M PSM, firmware update (FOTA), gateway architecture
• Ecosystem: 3GPP CIoT integration, LoRaWAN, cloud platforms, industry verticals

Example Questions It Handles

Specification deep-dives:

"Walk me through how the Bootstrap-Pack-Request works in v1.2.2 and how it differs from client-initiated bootstrap."

Security architecture:

"Explain how DTLS CID (RFC 9146) solves the NAT rebinding problem for NB-IoT devices in PSM. Show the message flow."

Implementation guidance:

"What are the trade-offs between using mbedTLS vs TinyDTLS for a Wakaama-based client on nRF9161?"

Cross-version comparison:

"Compare the data encoding options across LwM2M versions — TLV, JSON, SenML-JSON, SenML-CBOR, LwM2M CBOR."

Deployment planning:

"We're deploying 50,000 NB-IoT water meters. Walk me through the LwM2M architecture — Queue Mode, DTLS CID, firmware update strategy, and lifetime/pmax tuning."

Object model design:

"How do I register a new LwM2M Object with the OMNA registry? What are the rules for reusable resources?"

Installation

Claude Desktop (Cowork)

1. Download oma-lwm2m-expert.skill from Releases
2. Open it — Claude will prompt you to install

Manual Install

Copy the oma-lwm2m-expert/ folder into your Claude skills directory:

~/.claude/skills/oma-lwm2m-expert/
├── SKILL.md
└── references/
    ├── versions.md
    ├── objects.md
    ├── protocol-details.md
    ├── security.md
    ├── implementations.md
    └── ecosystem.md

Claude Project

Upload the skill files to a Claude Project's knowledge base, or add the SKILL.md as a project instruction file with the references/ folder as supplementary files.

What's Inside

| File | Purpose | |------|---------| | SKILL.md | Main skill instructions — response patterns, 6 knowledge domains, when to web search | | references/versions.md | Detailed version-by-version breakdown (v1.0 → v2.0) with feature deltas | | references/objects.md | Complete core objects reference (0-25), IPSO Smart Objects, OMNA registry | | references/protocol-details.md | CoAP mapping, message flows, transport bindings, Wireshark patterns | | references/architecture.md | Complete protocol flows (Bootstrap/Registration/Observe/FOTA/SOTA), client HAL/PAL architecture, server architecture, NBI/hyperscaler integration, massive-scale IoT patterns, production checklist | | references/security.md | DTLS/TLS/OSCORE deep-dive, CID flow, credential provisioning, library comparison | | references/implementations.md | Open-source stacks (Wakaama, Leshan, Anjay), testing, interop notes | | references/ecosystem.md | Gateway, 3GPP CIoT, LoRaWAN, cloud platforms, industry verticals, v2.0 roadmap |

Coverage

Specification Versions

| Version | Published | Key Additions | |---------|-----------|---------------| | v1.0 | Feb 2017 | Core protocol: Bootstrap, Registration, DM&SE, Observe, Queue Mode | | v1.0.2 | Feb 2018 | Bug fixes and errata | | v1.1 | Jun 2018 | TCP/TLS, Non-IP (3GPP CIoT, LoRaWAN), OSCORE, SenML | | v1.1.1 | Jun 2019 | CBOR for single resources | | v1.2 | Nov 2020 | MQTT, HTTP, Gateway, Composite ops, Send, LwM2M CBOR, DTLS CID | | v1.2.1 | Dec 2022 | Interop clarifications | | v1.2.2 | Jun 2024 | Bug fixes, editorial improvements | | v2.0 | 2026 (est.) | Profile IDs, delta FOTA, eSIM, edge computing proxy |

Underlying RFCs

| RFC | Title | LwM2M Role | |-----|-------|------------| | RFC 7252 | CoAP | Application protocol | | RFC 7641 | CoAP Observe | Notification mechanism | | RFC 7959 | CoAP Blockwise | Large payload transfer | | RFC 8323 | CoAP over TCP/TLS/WS | TCP transport binding | | RFC 6347 | DTLS 1.2 | UDP transport security | | RFC 9146 | DTLS Connection ID | NAT traversal for sleepy devices | | RFC 9147 | DTLS 1.3 | Modern transport security | | RFC 8613 | OSCORE | Application-layer security | | RFC 8428 | SenML | Data encoding | | RFC 8949 | CBOR | Binary encoding |

Complementary Skills

This skill pairs well with:

• 3GPP Expert Skill — For 3GPP radio access and core network context (NB-IoT, LTE-M, 5G CIoT)

Contributing

Contributions welcome! If you spot an inaccuracy, want to add coverage for a specific topic, or have suggestions:

1. Open an issue describing the improvement
2. Fork the repo and submit a PR
3. Ensure all specification references are accurate (cite OMA-TS document and section)
4. Use correct OMA/IETF terminology

License

MIT License — see LICENSE for details.

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Built by Sean van der Walt — Walt Technologies