Positioning · Connectivity · Voice · Vision · Asset tracking — five field-proven technology stacks, delivered from schematics to mass production. See also EGO data-collection ODM and MagNav PDR.
Outdoor BeiDou satellites, indoor Bluetooth beacons — one terminal plus one network closes the "last hundred metres" gap in airports, hospitals and warehouses.
Seamless GNSS ↔ BLE handover by signal strength and motion state; uplink path selectable between BLE and LoRaWAN gateways by power and data-fee budget
| GNSS module | Channels Tau1202: dual-band multi-constellation (BDS-3/GPS/GLONASS/Galileo), PPP satellite augmentation, 1 m accuracy, AGNSS |
| Indoor beacons | BLE 5.x iBeacon (UUID/Major/Minor), 1-10 Hz, coin cell for 2-5 years |
| Uplink gateway | BLE gateway (Wi-Fi/4G) or LoRaWAN gateway (SX1302) — dual-path selection |
| Fusion | Optional BLE 5.1 AoA down to sub-metre; weighted filtering against RSSI jitter |
Kilometre-range coverage on a coin cell lasting years — the standardised "cloud-pipe-device" architecture, the default answer beyond 100 nodes.
Class A power-sipping / B scheduled / C real-time downlink — per-scenario selection; OTAA join with dual-layer NwkSKey + AppSKey encryption
| Radio | Semtech SX1262 / LLCC68, +14 dBm, -148 dBm sensitivity, km-scale line of sight |
| Gateway | SX1302/SX1308 concentrator, 8 uplink channels, 4G / Ethernet backhaul |
| Server | Self-hosted ChirpStack (open source) or TTN; FUOTA firmware update |
The open-source XiaoZhi ecosystem (github.com/78/xiaozhi-esp32, MIT, 29k★) on a domestic Wi-Fi 6 audio SoC — the low-cost path to putting LLMs into speakers, pendants and robots.
Bidirectional MCP: device-side control (volume / LED / servo / GPIO), cloud-side smart-home and knowledge tools; private server deployment supported
| SoC | Beken BK7258: Wi-Fi 6 + BLE 5.4, ARM M33F @480 MHz, 8-16 MB PSRAM, H.264 HW encode, QFN88 9×9 mm |
| Audio chain | Dual ADC + DAC + DMIC + APLL, 4-band HW EQ, AEC full-duplex echo cancellation |
| Cloud | Streaming ASR + Qwen/DeepSeek + TTS; open-source server for private deployment |
Benchmarked against Looki L1 (30 g / 12 h / event segmentation / daily vlog): the white-label and industry path to always-on first-person capture plus cloud multimodal storytelling.
E907 real-time MCU keeps idle capture alive while the main cores sleep — millisecond cold start (AOV); EIS stabilisation + AI-ISP 2.0 for all-day image quality
| SoC | Allwinner V881: dual-core RISC-V C907 @1.4 GHz + E907 MCU, 1 TOPS NPU, 4K30 H.265, dual-band Wi-Fi 6 + BT5.4, Tina Linux |
| Imaging | Up to 24 MP sensor, AI-NR / EIS / LDC hardware, 8192×8192 JPEG snapshot |
| Cloud pipeline | Whisper-class ASR + Qwen-VL → event segmentation → minutes / vlog / comic / weekly digest → vector memory → proactive AI |
Beacon broadcast × tag-relay scan × LoRaWAN backhaul — wire-free, subscription-free, maintenance-free metre-level asset tracking across a five-hop chain, widely deployed in overseas projects.
Tags never connect to the internet — they only "listen" to beacons and "shout" onward; IMU dual mode (high-rate scan on motion, fixed heartbeat at rest) gives years of battery life, thousands of tags sharing one network
| Beacon layer | iBeacon fixed broadcast, 1-10 Hz, coin cell 2-5 years, density-grid deployment |
| Tag layer | Low-power BLE tag with IMU: event-driven + fixed-heartbeat dual mode; scans beacon ID+RSSI → rebroadcasts (relay fingerprint) |
| Backhaul | BLE-to-LoRaWAN bridge + SX1302 concentrator, 4G/Ethernet to ChirpStack |
| Platform | RSSI fingerprint / centroid positioning + audit, geofencing, alerts, REST API |
All five stacks share the same APQP cadence with transparent stage reviews
Spec freeze · design review · quote
Schematics → samples → function test
Mechanical freeze · reliability
Pilot run · quality SOP
Mass production · long-term support
Each stack starts independently — or combine them (e.g. BeiDou positioning + LoRaWAN backhaul)
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