Omi DevKit 2 (Open-Source nRF5340 AI Necklace)
Open-hardware dual-core Nordic nRF5340 AI voice necklace and EEG/PPG sensor platform with a public GitHub firmware repo and plugin marketplace.
Key Engineering Highlights
- Complete KiCad schematics, STL enclosure files, and Zephyr RTOS firmware on GitHub
- Streams raw Opus frames to any custom webhook or self-hosted home server
Full Hardware Specifications
| Processor / Edge SoC | Nordic nRF5340 Dual Arm Cortex-M33 |
|---|---|
| AI Model Stack | Custom Webhook / Local Whisper + Llama |
| Display & Optics | Screenless + Programmable RGB Ring |
| Camera & Vision | Optional OpenMV Camera Hat |
| Measured Weight | 14.5g |
| Battery & Runtime | 32h Continuous Opus Streaming |
| Connectivity & I/O | BLE 5.4 Audio (Opus 16kbps) + MicroSD |
| Sensors & Acoustics | Digital PDM Mic + 6-Axis IMU |
⚖️ Side-by-Side Comparison: Omi DevKit 2 (Open-Source nRF5340 AI Necklace) vs. AI Wearables & Audio Peers
Direct specification comparison against leading competing devices in the AI Wearables & Audio category.
| Specification | Omi DevKit 2 (Open-Source nRF5340 AI Necklace) (Current) | PLAUD NotePin Pro Magnetic AI Memory Capsule → | Limitless Pendant 2 All-Day AI Clasp → | Bee Pioneer AI Wearable Band & Clip → |
|---|---|---|---|---|
| Brand | Based Hardware | PLAUD.AI | Limitless | Bee Computer |
| Retail Price | $89 | $179 | $129 | $99 |
| Lab Rating | ||||
| Edge SoC | Nordic nRF5340 Dual Arm Cortex-M33 | Custom Dual-Core Noise-Canceling DSP + BLE 6.0 SoC | ARM Cortex-M55 + Ethos-U55 microNPU | Ambiq Apollo4 Plus Sub-Threshold MCU |
| AI Model Stack | Custom Webhook / Local Whisper + Llama | Whisper-Large-v3 + Claude 4 / GPT-4o | Limitless Cloud Memory Engine | Cloud Agent Graph + Local VAD Gate |
| Display / Optics | Screenless + Programmable RGB Ring | Micro-perforated status LED + Linear haptic motor | Privacy Recording Status LED | Screenless + Physical Mute Button |
| Camera | Optional OpenMV Camera Hat | None | None | None |
| Weight | 14.5g | 22.0g | 17.5g | 15.0g |
| Battery | 32h Continuous Opus Streaming | 24h continuous recording / 45-day standby | 100 hours active recording | 7 Days Mixed Use / 40h Continuous |
📚 Related Engineering Teardowns & Reviews
Browse All 83 Articles →Omi DevKit 2 ($89) Review & Teardown: The Best Open-Source nRF5340 AI Wearable for Builders
RECIWO Labs audited the open-source Omi DevKit 2 (Based Hardware) across BLE 5.4 Opus packet stability, Zephyr RTOS battery drain, and custom webhook memory plugins.
2026 Compliance Guide for AI Hardware Founders: FCC RF, CE RED, UL 62368-1 Battery & EU AI Act Transparency
Why using pre-certified RF modules (ESP32-S3-WROOM / nRF5340) saves hardware startups $45,000 and 14 weeks of FCC/CE unintentional-radiator lab testing.
Sub-$100 AI Voice Wearables Shootout: Bee Pioneer Band ($99) vs. Omi DevKit 2 ($89) vs. Xiaozhi Cube ($39)
RECIWO Labs tested the three best sub-$100 AI voice devices on the market in 2026, proving you do not need to spend $300+ to get reliable agentic voice memory and MCP automation.
Meta Ray-Ban Display & sEMG Neural Band Teardown: Inside the 5,000-Nit Waveguide and Wrist Neuromotor Interface
RECIWO Labs disassembled the $799 Meta Ray-Ban Display and IPX7 sEMG Neural Band, benchmarking its 5,000-nit 42-PPD geometric waveguide, 69g thermal profile, and 14ms wrist neuromotor gesture latency against Xiaomi AI Glasses and Even Realities G2 Air.
