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Connecting the scale

From your indicator to the ticket: one cable, one small device, nothing typed by hand.

This page is for whoever runs the scale room, or buys for it. In order: what the indicator needs, the two ways the reading travels, how a scale is registered and approved, what the operator sees, what happens when the internet drops, and who prepares what.

  1. Indicator
  2. Cable
  3. Agent or device
  4. Ticket

The one requirement: an indicator with a data output — RS-232 is the most common.

The system reads your existing indicator over its serial port (RS-232). Most digital indicators have one.

If yours only shows the number on its display, what gets replaced is the indicator, not the weighbridge. A mechanical weighbridge converts with load cells and a digital indicator; the platform stays where it is.

Send us the indicator model and a photo of the port. We answer before any contract.

CaseWhat it means
WorksA digital indicator that sends the reading on a serial port — usually RS-232, or USB that Windows shows as a COM port. The bridge stays; a cable and an agent or device are added.
Needs a new indicatorAn indicator that only displays the number with no data output, or a mechanical bridge with no digital indicator. The platform stays; a digital indicator goes in — and load cells, if there are none.

We do not promise that every model works. We answer every model sent to us before any contract.

Two ways

Two ways to deliver the reading: a Windows agent that runs when the PC starts, or an ESP32 device we program and ship.

Both deliver the reading to your account with the scale's own device token. No logged-in user — whatever their role — can write into the live feed.

Windows agent

DownloadA zip you download inside the system, with the device token from the scales page.
Runs onPowerShell and Task Scheduler on Windows 10 or 11. No Node, no installers, no build tools.
SetupA config.json with the COM port, baud rate, line ending and divisor. Then install.bat as administrator.
In serviceRuns hidden whenever the PC starts, with no browser and no logged-in user.
If the indicator goes quietDrops the reading after 3 seconds so no stale number stays on screen, and reopens a wedged port by itself after 20 seconds.
{
  "comPort": "COM3",
  "baudRate": 9600,
  "delimiter": "\r\n",
  "divisor": 1
}
config.json keys — alongside your company address and the device token

ESP32 device programmed and shipped by us

What it isA small device on the site WiFi. It plugs into the indicator's output and sends the reading itself.
PCNone needed. The scale room gets by with a phone, or any device that opens the system.
OrderingFrom inside the system. We program it with your scale's token and ship it ready.
AuthenticationThe same device token the Windows agent uses, and nothing else.

Which one? A Windows PC already in the scale room only needs the agent. A room with no PC, or a scale far from the office, suits the device.

Every scale is registered by name and branch and approved before it publishes its first reading.

The account owner registers the scale on the scales page; WeighHub approves it. Only approved scales count toward the plan limit, and only approved scales may publish.

Each scale has a device token copied with one button and placed in the agent or the device. The screens page shows every scale's current reading and whether it is online or offline.

Scale registerSample customer
ScaleBranchApprovalLink
Gate scaleMain branchApprovedOnline — 18,340 kg
Warehouse scaleIndustrial zoneAwaiting approval—
Register
The weighing screen

On the weighing screen: the reading every second, and a button that works only when it is stable.

The reading reaches the weighing screen every second, and the capture button works only when the reading is fresher than 12 seconds and stable. Every phone or PC on the branch sees the same number.

New weighing screen with the capture-from-scale button123
  1. The live reading as the indicator published it, with the stable flag.
  2. The capture button: enabled when the reading is stable and fresh, disabled otherwise.
  3. When the line goes quiet the screen says "bridge offline", and no stale number can be captured onto a ticket.
18,34018,34018,340Stable

The indicator itself flags the reading stable, and it is under 12 seconds old = stable. The button works.

— — —Bridge offline

A line quiet for more than 12 seconds. The button is disabled until the reading returns.

Manual entry is possible, but it is a permission granted per user for breakdowns, and whenever it is used the ticket itself prints "Entry method: manual". More in: Controls.

If the internet drops: the weight stays on screen, and quick weighings are kept and sent later without duplicates.

The link between the indicator and the PC is local, so weighing does not stop when the internet does.

Quick weighings recorded during the outage are queued on the device, each with a unique reference the server uses to prevent duplicates: if a weighing arrives twice, it is recorded once. A rejected weighing stays visible in the queue until you review it.

Reports, the phone dashboard and QR verification need a connection. We recommend a backup data SIM in the scale room.

#Q-0001Waiting to send
#0041Sent ✓

Local reference #Q-0001 became ticket #0041 when the connection returned, and was recorded once.

Who prepares what

What you prepare and what we prepare — as written in the terms, not in the advert.

You connect the indicator following our written guidance; we check the readings with you. Usually days, depending on the indicator and the cable.

You prepareWe prepare
The indicator wiring and the serial cable to the PC or device, following our written guidance.The account and your company's own address.
Stable power for the indicator and the PC.Scale registration, approval and its device token.
Internet in the scale room, plus a backup data SIM.The Windows agent, or an ESP32 programmed for your scale.
A Windows 10 or 11 PC that does not sleep, or a phone, and a ticket printer.Training at go-live.
Checking the first readings with us before the first ticket.Email support on every plan.
What we do not claim
  • WeighHub is a recording system. It does not measure and it does not calibrate — that is the indicator's job, and the calibration technician's.
  • We do not run the cable or open the indicator. You or your technician connect it with our guidance, and we confirm with you that what is on screen is what is on the indicator.

More in: Terms — clauses 5 and 12.

Optionally: every reading the scale published is kept, so you can see what the indicator showed at any moment.

Switched on per company, if you want it. A reading is stored on every change, not every second, so the log stays readable.

The reading review page filters by scale and date and exports CSV up to 2,000 rows. Recent readings stay in the database for a few days, then move to a separate archive so backups stay small.

Useful when someone says "the indicator showed a different number": go back to that minute and read it.

Reading reviewGate scale
10:41:02 · 0 · —10:41:05 · 17,960 · —10:41:07 · 18,340 · ✓10:41:26 · 18,340 · ✓10:41:40 · 0 · —
Time · weight in kg · stable

Send us the indicator model and a photo of the port, and we tell you before any contract whether it will work.

No commitment

A quote for your number of scales and branches.

A reply to your email within one business day, no commitment.

Request a quote

The weighing screen as the operator sees it.

No indicator is attached to the demo, so its weighing screen reads "bridge offline".

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