Chandigarh Smart City Weighbridges

Chandigarh Municipal Corporation, as a smart city, wanted to know exactly how much waste it collects — dry and wet, by area — and how much recovered material is resold, so it can manage its resources properly. That meant capturing every vehicle weighing across 14 weighbridges spread over six to seven locations, reliably and in real time: confirming each vehicle was correctly positioned, recording visual proof, and feeding all of it into the city’s central SCADA system, with no lost data.

Indivar was the software partner to Maxim Mechatronics, which supplied and installed the 14 weighbridges. Indivar built the software that turns each weighbridge into a connected “worker node”: a Raspberry Pi running a Go application with a local SQLite store, publishing every weighing event over MQTT — a protocol chosen for guaranteed delivery, so no reading is ever lost. At each weighbridge, Indivar integrated multiple sensors to confirm the vehicle is correctly positioned, a traffic light to guide the driver into place, and a CCTV camera to capture a snapshot and video of every vehicle. The central control node — built on Node.js with a PostgreSQL database and a Next.js (React) front end — aggregates live data and reports from all 14 worker nodes and feeds the Chandigarh Municipal Corporation’s integrated SCADA system. Synchronisation runs both ways: weighing data flows up from the workers, while master data and configuration are pushed down from the central node to every weighbridge remotely — so the whole network is managed and updated without visiting a single site. Delivered over about five to six months as a pilot, it gives the administration live visibility of waste collected by type and area — and is now offered as a product: Indivar’s weighbridge software paired with Maxim’s hardware, for municipal and industrial weighing.