Specifications
Every figure with its condition.
The technical page of Loki. How a cell works, what each product is made of, what arrives with Loki 2, and what the law expects from the employer. What is not measured is not here.
Four or more anchors on the walls make a cell. The tag transmits a short signal; the anchors timestamp it and the engine on your server computes the position. Observed accuracy about 10 cm in a 25 m² cell with four anchors, line of sight. Larger cells are being characterised.
From the tag to your systems. The engine and Loki Manager run on your server, in Docker, also on an isolated network; positions reach your systems through the API.
| Parameter | Value | Condition |
|---|---|---|
| Accuracy indoors | ≈ 10 cm | Measured: 25 m² cell, four anchors, line of sight. Larger cells being characterised. |
| Position updates | 5 per second | Tag in motion; one every 2 s at rest. |
| Method | Time difference of arrival | Anchors timestamp the tag’s signal; 2D solve with an extended Kalman filter. Loki 2: two-way ranging in time slots, in development. |
| Anchors per cell | 4 or more | One sync master per cell; cells join by radio; handover between cells in test. |
| Cables between anchors | 0 | Each anchor needs power and Ethernet, or a Bluetooth gateway in range. |
| Calibration | Automatic | By ranging between the anchors of a cell. |
| Server | Your server, Docker | Engine and Loki Manager; Docker Compose on Ubuntu Server; offline install kit; isolated networks supported; no cloud, no licence fee. |
| Integrations | REST, WebSocket, SSE, webhooks | |
| Firmware updates | Over the air | Anchors from Loki Manager (first fleet campaign in test); tags over Bluetooth with a service tool. |
| Certifications | CE declaration for the boards: not issued yet | The radio module is certified. ATEX: not certified; zone 1 planned. |
| Warranty | 2 years | Against manufacturing defects. |
| Parameter | Value |
|---|---|
| Radio | UWB IEEE 802.15.4z, channel 5 (6.5 GHz), Qorvo DWM3001C module · Bluetooth LE for setup and updates |
| Update rate | 5 positions per second in motion, 1 every 2 seconds at rest (motion detected on board) |
| Power | CR2450 coin cell, replaceable. Autonomy being measured; order of magnitude months, published with its profile |
| Mount | Clip, lanyard or VHB adhesive; enclosure being finalised |
| Firmware | Signed images, updated over Bluetooth with a service tool |
| Alarms | SOS, fall, no movement: Loki 2, in development |
| Parameter | Value |
|---|---|
| Anchor radio | UWB IEEE 802.15.4z channel 5 (Qorvo DWM3001C), continuous receive · Bluetooth LE |
| Anchor power | USB-C, 5 V, about 1 W. No PoE, no battery (PoE with Loki 2, in development) |
| Anchor data path | Ethernet 10/100 (RJ45, one switch port per anchor), recommended; Bluetooth LE to an optional gateway for low-rate configurations |
| Gateway | Optional. Olimex ESP32-POE: PoE 802.3af or Wi-Fi, up to 7 anchors over Bluetooth; recommended only for low-rate configurations |
| Cell | 4 or more anchors, one sync master per cell, synchronisation over the air; multi-cell handover in test |
| Method | TDoA: anchors timestamp the tag's blink; 2D solve with extended Kalman filter. Loki 2: two-way ranging in time slots with angle of arrival, in development |
| Software | Loki Manager + engine, Docker Compose on Ubuntu Server, offline install kit, isolated networks supported |
| Accuracy | About 10 cm, observed in a 25 m² cell with four anchors in line of sight; larger cells being characterised |
Loki 2
What arrives with Loki 2.
The generation now in development: prototypes targeted for the end of 2026. Everything here carries its status; times in brackets are targets, to be measured at the pilot.
In development
| Event | What happens |
|---|---|
| SOS | Press and hold: the control room sees who and where in [3] seconds, and the tag confirms with a vibration. |
| Fall | A fall is detected on the tag and sent with the position; the wearer can cancel within [10] seconds. |
| No movement | After [60] seconds without movement the tag asks the wearer; after [30] more, the alarm goes out with the position. |
| Restricted area | Entering a restricted zone notifies the wearer and the control room; the zone and the time are logged. |
| Mustering | At the alarm, Loki counts who is at the assembly point and lists who is not, with their last position. |
Alarms depend on tag wear, coverage and network availability. They support the emergency plan; they do not replace it, and they do not eliminate operational risk.
Loki Tag 2
In developmentRechargeable wearable: SOS button, fall and no-movement detection, vibration and voice back, GNSS and an 868 MHz radio for the outdoors.
Node 2
In developmentInfrastructure node with PoE and angle of arrival, for Loki X and Loki One.
Two-way ranging in time slots
In developmentEach tag ranges against every anchor in its own slot, which also carries messages back to the tag. Replaces time difference of arrival.
The outdoor layer
In developmentOutdoor positions from the tag’s GNSS; alarms and status over the 868 MHz link through Loki Eagle, the base station under study.
Under D.Lgs. 81/2008 the obligations sit with the employer. Loki supports the risk assessment with data, feeds the emergency plan with a time-stamped log, and gives the safety manager who and where at the moment it matters. It does not make a plant compliant and it does not guarantee safety.
| D.Lgs. 81/2008 | Lone-worker and emergency measures: with Loki 2, alarms with position, mustering count, log for the DVR. |
| ISO 45001 | Emergency preparedness and response: with Loki 2, a tested alarm path with a measured time to alarm. |
| ATEX | The pilot runs in non-hazardous areas. Certification for zone 1 is planned; we publish the marking when we have it, not before. |
| INAIL ISI | Safety investments of this kind are eligible for the INAIL ISI grant; we provide the documentation. |
| Loki Tag | The tag on the person: today UWB positioning on a coin cell. With Loki 2: SOS button, fall and no-movement alarms, vibration and voice back, rechargeable, GNSS and long-range radio outdoors. | Available |
| Loki Tag+ | The Loki 2 tag with a high-capacity radio for continuous data outside the cells. Under study. | In development |
| Loki X | A cell of four or more anchors: about 10 cm indoors in line of sight, USB-C power, Ethernet data path, optional Bluetooth gateway for low-rate configurations. PoE and angle of arrival with Loki 2. | Available |
| Loki One | A whole cell in one ceiling unit, about 30 × 30 cm target: distance and direction from a single point. | In development |
| Loki Eagle | The outdoor layer: a long-range 868 MHz link for alarms and status where UWB does not reach, with the same tags. Under study. | In development |
| Loki Dock | Charging and check-in at the gate: the tag you pick up is the tag that counts you in. | In development |
| Loki Manager | One screen in the control room: live map, calibration, diagnostics, firmware, and an API for your systems. Alarms with position and mustering: Loki 2. | Available |
See a plant running Loki.
A site survey takes a morning. We come with four anchors and a laptop, map a cell, and leave you the data.