Bringing Legacy Machines Online: A Practical Guide to IoT Retrofitting

How low-cost ESP32 sensors and MQTT can bring 20-year-old manufacturing equipment into your ERP dashboard — without replacing a single machine.

IoT
2026-04-22
Dhaara Tech Team

Most Indian factories run machines that are 10-20 years old with no digital output. Retrofitting IoT sensors is the most cost-effective way to get real-time production data. This article covers sensor selection, ESP32 programming, MQTT setup, and integration with ERP dashboards.

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