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Case study · 16

MeshPot

SmartTruck (TRAXON onboard) — a phone becomes a mobile weighbridge, no fixed scale required.

React NativeBluetooth (HC-05)Onboard Load CellsGPS Telemetry
MeshPot
Overview

MeshPot SmartTruck (TRAXON onboard) is a React Native mobile app for iOS and Android that turns a smartphone into a mobile weighbridge terminal for dump trucks and material haulers. It pairs with an onboard Bluetooth load-cell controller and uses GPS-driven trip automation to weigh loads on the move — so a truck no longer has to visit a fixed weighbridge to record what it is carrying.

The challenge

Fixed weighbridges force trucks to detour and queue, and manual weighment relies on someone pressing the right button at the right moment. Doing it onboard means reading noisy load-cell signals over Bluetooth, deciding when a weight is trustworthy, and detecting loading and unloading automatically from the truck’s movement — all from a phone, with no operator input.

What we built
01

Onboard Bluetooth weighing

Pairs with an HC-05 Bluetooth module wired to up to six load cells on the truck’s suspension or bucket, continuously streaming raw ADC counts and converting them to a live weight.

02

Automatic trip detection

An 11-stage GPS and telemetry state machine automatically detects loading and unloading cycles from the truck’s movement — no manual start/stop and no button presses.

03

Hands-free trip reports

Each completed trip produces a full report on its own — Gross, Tare, and Net weight, GPS locations, distance travelled, and timestamps.

04

No fixed weighbridge required

Because weighing happens onboard, trucks are measured wherever they are, removing detours to and queues at a static weighbridge.

Under the hood
01

React Native (iOS + Android)

A single React Native codebase (internally named bar_weighment) delivers the mobile weighbridge terminal on both iOS and Android.

02

Bluetooth load-cell link

Reads raw ADC counts from an HC-05 Bluetooth-connected controller wired to up to six load cells, applying calibration to produce a live weight on the phone.

03

GPS + telemetry state machine

An 11-stage state machine fuses GPS position and sensor telemetry to recognise trip phases and trigger weight capture automatically.

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