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.
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
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?"
- Download
oma-lwm2m-expert.skillfrom Releases - Open it — Claude will prompt you to 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
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.
| 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 |
| 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 |
| 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 |
This skill pairs well with:
- 3GPP Expert Skill — For 3GPP radio access and core network context (NB-IoT, LTE-M, 5G CIoT)
Contributions welcome! If you spot an inaccuracy, want to add coverage for a specific topic, or have suggestions:
- Open an issue describing the improvement
- Fork the repo and submit a PR
- Ensure all specification references are accurate (cite OMA-TS document and section)
- Use correct OMA/IETF terminology
MIT License — see LICENSE for details.
Built by Sean van der Walt — Walt Technologies