Rigi — Vehicle Occupancy Detection System

Installation & User Guide

Hertzwell Pte. Ltd. · Version 1.0 · July 2026

1. What this system does

Rigi is a radar-based Vehicle Occupancy Detection (VOD) system. As a vehicle drives through the detection lane, the system measures how many people are inside it — without cameras, in any lighting or weather — and shows the result live on a web page.

The vehicle drives between the two sensor poles; the occupancy result appears on the web page within seconds.

2. What's in the kit — items shipped

The two photos below show every item shipped with the system:

Item	Picture	Qty	Label(s)
Radar sensors		6	TL CL BL (left pole) · TR CR BR (right pole) — each also has a TOP sticker
Radar mounting arms		6	labelled to match the radars (TL…BR)
Connector box (network + power for radars)		1	HERTZWELL, ports labelled P, PC/E, power CBP
Rigi computer (NUC)		1	PC / HERTZWELL
NUC power adapter		1	NUCP
Connector box power adapter		1	CBP
4G router (TP-Link TL-MR6400), with Hertzwell test nano-SIM installed		1	replace the SIM before use, see §3.6
Router power adapter		1	RP
Router antennas (with connecting cables)		2	screw onto the router's antenna connectors
Laser + mounting bracket + USB cable		1	L
USB extension cable (for the laser, if a longer run is required)		1	—
Waterproof Ethernet connector assemblies (radar-side sealing)		6 + spares	fit over the RJ45 plug of each radar cable — see §3.4
USB-to-Ethernet adapter with grey internet cable (router ↔ computer)		1	I

Not included — to be provided by the customer:

• the 6 radar Ethernet cables — lengths are site-specific (lane geometry and pole-to-connector-box distances); see §3.4 for the specification
• 1 Ethernet cable from the computer to the connector box — a standard Ethernet patch cable, length to suit where the computer is placed; it connects the connector-box port labelled PC/E to the computer's built-in network port labelled E (see §3.4 and §3.7)

The golden rule of assembly

Every cable and every port carries a matching label. Plug each labelled cable into the port with the same label. If every label matches, the wiring is correct.

3. Hardware installation

3.1 Set up the two sensor poles

Left / Right convention (used everywhere in this guide): stand in the lane facing the oncoming vehicle — the car drives toward you. From that viewpoint:

• everything labelled Left (TL CL BL) is on your left
• everything labelled Right (TR CR BR) is on your right

The lane has one direction of travel — the system is calibrated for vehicles driving toward this observer position. Keep this viewpoint in mind for every left/right instruction below.

The top view below summarises the layout: the lane, the two poles (3 m between pole centres), the direction of travel, and the system's coordinate reference (origin at lane-surface level midway between the poles; the ⊙ symbol is the z-axis pointing up out of the page; the vehicle travels in the −x direction):

Place the two poles on either side of the lane, facing each other, at the positions marked for the site. The lane passes between them.

Key dimension: place the poles 3 m apart, measured between the pole centres, directly opposite each other across the lane (the radar faces then sit ≈ 2.85 m apart, matching the factory calibration). Both poles stand at the same position along the lane.

Height datum: all mounting heights in this guide are measured from the lane surface — the road surface on which the vehicle's wheels run. If a pole stands on a kerb, plinth or any raised base, measure heights from the lane surface the vehicle drives on, not from the base of the pole.

3.2 Fix the mounting arms to the poles

Each white mounting arm is labelled (TL, CL, BL, TR, CR, BR). Fix each arm to its pole at its position — Top / Centre / Bottom — using the heavy cable ties through the bracket holes.

Mounting heights: each bracket carries a red reference line (shown below). Set the bracket so its red line is at the following height above the lane surface (see the height datum note in §3.1):

With the red lines at these heights, the radars automatically sit at their calibrated positions (radome centres at ≈1.2 / 1.4 / 1.6 m — exact values in §3.3).

3.3 Mount the radars on the arms

Each radar carries the same label as its arm — match radar CL to arm CL, and so on. Two rules:

1. Label matches label — radar TL on arm TL, radar BR on arm BR…
2. The "TOP" sticker faces up.

Fixing the radar to its mount: each radar ships with its 4 mounting screws and nuts loosely fitted on the radar's mounting plate. Use these 4 screws (marked 1–4 below) to fasten the radar to the mount, then tighten them.

⚠️ WARNING — do not touch any other screw on the radar. Only the 4 marked mounting screws may be loosened or tightened. Every other screw (enclosure and heatsink screws, marked ✗ below) is factory-set: disturbing them will de-calibrate the radar and can render it permanently unusable.

The mounting brackets are shipped pre-set to the correct angles — use the brackets themselves as the reference. Do not loosen or adjust the swivel joints. The values below are for verification only, or to restore a joint if it was disturbed during transport:

These values come from the system's factory calibration — the software assumes exactly this geometry. The photos in this guide show each radar at its correct angle — when in doubt, compare your pole against the matching photo.

Reference — exact sensor positions. When the poles stand 3 m apart (centre-to-centre) and the brackets' red reference lines are at the heights given in §3.2, each radar sits at the following position in the system's coordinate frame (origin at lane-surface level, midway between the poles; axes as in the §3.1 top-view diagram — +y toward the left pole, vehicle travelling in −x, z up):

When both poles are done, the lane looks like this:

3.4 Radar network cabling (customer-supplied) and connection

Cable procurement. The six radar Ethernet cables are not included in the kit, as the required lengths depend on the site layout. Provide six Ethernet cables (Cat5e or better; outdoor-rated recommended) with standard RJ45 connectors, each sized for its individual run — from the radar position on the pole (top / centre / bottom) down to the connector-box location — with adequate slack for routing and strain relief.

Waterproofing the radar-side connection. The kit includes six IP-rated waterproof Ethernet connector assemblies (shown below). Before connecting each cable at the radar end:

1. Slide the waterproof connector assembly over the RJ45 plug of the cable (radar end), so the assembly sits behind the plug.
2. Insert the RJ45 plug into the P connector on the back of the radar.
3. Screw the assembly's shell onto the threaded P port and tighten finger-tight — this compresses the seal and makes the radar-side connection weatherproof.

The connector-box end of each cable plugs in normally (the box P ports carry the same threaded weatherproof glands — tighten those finger-tight as well).

Connection. Run the six cables to the black connector box and plug each into any free port labelled P.

Then connect an Ethernet cable (customer-supplied, standard patch cable) from the connector-box port labelled PC / E to the computer's built-in network port labelled E (next step).

⚠️ DANGER — the P ports are for radars ONLY. The P ports carry power for the radars. Never plug the computer's Ethernet cable — or any other equipment — into a port labelled P: doing so will permanently destroy the computer. The computer connects only to the port labelled PC / E.

Finally connect the connector box power adapter labelled CBP:

3.5 Mount the laser

Mount the laser with its bracket on either pole (left or right — both work), observing the following placement:

Connect its USB cable labelled L — it goes to the computer front port labelled L.

Extended cable runs. If the distance between the laser position and the computer exceeds the length of the laser's own cable, use the USB extension cable supplied in the kit. Note that the plug-to-socket joint of a USB extension is not inherently weatherproof — if the joint is located outdoors or in an exposed position, seal it with self-amalgamating / waterproof tape (or house it inside a protected enclosure or conduit) so that no moisture can reach the connection.

3.6 Set up the 4G router

SIM card. The router is shipped with a nano-SIM installed (Hertzwell's test SIM — it will not provide service at your site). Before use:

1. Obtain a nano-size 4G SIM with a suitable data plan from a local operator. The system uses approximately 15–30 GB per month in normal operation — choose a plan with at least this allowance.
2. Open the router's SIM slot, remove the supplied SIM and keep it safe, and insert your SIM in its place.
3. When returning the system to Hertzwell, remove your SIM and re-insert the supplied SIM before shipping.

Changing the SIM — router settings. The router is a TP-Link TL-MR6400 (EU version). It configures the mobile connection (APN) automatically for most operators — with a standard consumer 4G SIM, no settings changes are normally needed: insert the SIM, power the router, and wait ~2 minutes for the internet indicator. If the internet indicator does not come on:

1. Connect a phone or laptop to the router (Wi-Fi or a LAN port) and open http://tplinkmodem.net (the admin password is printed on the router's label).
2. If the SIM has a PIN lock, enter or disable the PIN under Advanced → Network → PIN Management (or ask the operator for a SIM without PIN).
3. If the operator's APN was not detected automatically, create it under Advanced → Network → Internet using the APN name provided by the SIM operator.

Compatibility: the supplied router is the EU-specification model and supports the 4G bands used by the French mobile networks (including bands 1 / 3 / 7 / 8 / 20 / 28) — nano-SIMs from French operators (Orange, SFR, Bouygues, Free and their resellers) will work.

The nano-SIM slot is on the rear edge of the router, next to the WPS/RESET button (circled below — note the insert-direction icon beside the slot):

Fit the two antennas, connect the power adapter labelled RP, and connect the grey network cable labelled I — it goes to the computer's USB network adapter, which is also labelled I.

3.7 Connect the computer (NUC)

The computer has four connections. Match the labels:

Front — two USB cables:

• I → the USB network adapter (internet, from the 4G router)
• L → the laser USB cable

The I and L labels appear on both the cables and the computer's USB ports — plug each cable into the USB port carrying the same label.

Rear — network and power:

• E → the Ethernet cable from the connector box (PC/E port), into the built-in network port
• NUCP → the power adapter labelled NUCP

Important: the E cable must go into the computer's built-in network port (labelled E on the computer body). The internet comes in only through the USB adapter labelled I. If these two are swapped, the system will not work.

⚠️ At the connector-box end, this cable goes only into the port labelled PC / E — never into a P port (P ports carry radar power and will permanently destroy the computer).

3.8 Power on — in this order

Each power label (CBP, RP, NUCP) appears on both the power adapter and the matching power-inlet port of its device — connect each adapter to the inlet carrying the same label, then switch on in this order:

1. CBP — connector box (the radars power up; small green lights appear on the radar faces)
2. RP — 4G router (wait until it shows an internet connection)
3. NUCP — the computer

The computer starts everything automatically. Allow about 2 minutes after power-on. No screen, keyboard, or any interaction is needed — the system is completely headless.

ℹ️ After a power cut the whole system recovers by itself — everything switches back on and resumes automatically when power returns.

4. Using the system

4.1 Open the live view

On any phone, tablet or computer with internet access:

1. Open a web browser
2. Go to: https://flamingo.hertzwell.app
3. Log in when asked:
4. Username: user
5. Password: 0114

4.2 Drive a vehicle through

Direction matters: the lane works in one direction only — the vehicle drives through in the calibrated direction of travel (toward the observer position that defines Left/Right, see §3.1). A vehicle crossing the opposite way is reported as Reversing and is not counted.

Drive through the lane slowly and steadily (walking-to-jogging pace), one vehicle at a time:

4.3 Reading the display

Idle — no vehicle in the lane:

Inspecting — a vehicle was detected and its occupancy is being computed:

Result — the number of people detected, with the crossing logged in the Data Logs panel (per-lane average and vehicle count update automatically):

Radar health indicators: the two nested-square icons at the bottom of the detection pane show the state of each of the 6 radars individually:

• Left icon = left pole, right icon = right pole (Left/Right as defined in §3.1)
• Within each icon: outer ring = top radar · middle ring = centre radar · centre square = bottom radar

Partial failure example — here exactly two radars are offline: the top-left radar (outer ring of the left icon, red) and the bottom-right radar (centre square of the right icon, red); all other elements remain gray:

All radars offline — e.g. connector box unpowered — every element shows red:

A normal forward drive-through produces a result within a few seconds of the vehicle clearing the lane.

4.4 Getting a good reading

• Drive through slowly and steadily — do not stop inside the lane
• One vehicle at a time; leave a gap before the next vehicle enters
• Occupants seated normally

4.5 Data logging and export

Automatic logging. Every completed crossing is logged automatically — no action is needed. Each entry records the timestamp, the PAX count, a sequential vehicle number (V0001, V0002, …) and a status (OK, or ALERT for unusually high counts). The most recent entries appear live in the Data Logs panel on the right of the page, and the per-lane average and vehicle count in the Active Lanes panel update with each crossing. Logs are stored on the system day by day and survive restarts and power cuts.

Downloading the data. Click Export (top-right of the Data Logs panel) to open the export dialog:

1. Filter by — choose the period: Current Session, Last 24 Hours, or Date Range (pick from/to dates; up to 92 days per export)
2. Lane — choose a specific lane, or all lanes
3. Click DOWNLOAD CSV

The download is a standard CSV file with the columns lane, timestamp, pax, vehicle, status — it opens directly in Excel or any spreadsheet application for record-keeping, validation or reporting. Export as often as you like; downloading does not modify or delete the stored logs.

5. Troubleshooting

If a problem persists, contact Hertzwell (below). The system is remotely serviceable — in most cases Hertzwell can diagnose and fix issues without a site visit, as long as the computer has power and internet.

6. Do's and Don'ts

Do: - Keep the computer, connector box and router powered at all times - Keep the radar faces and the laser lens clean and unobstructed - Keep the weatherproof glands screwed finger-tight

Don't: - Don't connect a monitor, keyboard or USB drive to the computer — not needed - Don't loosen the radar swivel joints — the angles are pre-set and calibrated - Don't swap cables between ports — labels must always match - Don't press the router's WPS/RESET button — a factory reset erases the router configuration the system depends on - Don't press the computer's power button while it is running (power-cycling at the mains is the correct way to restart)

7. Support

Hertzwell Pte. Ltd.

• Contact: Bhaskar Jyoti Dutta
• Email: bhaskar.dutta@hertzwell.com
• Phone: +65 8269 1083

When contacting support, please describe what you see on the web page and, if possible, the approximate time of the issue.

© 2026 Hertzwell Pte. Ltd. — All rights reserved. This system and its software are the property of Hertzwell. Do not open the computer or the connector box, and do not modify the installation.