AWS IoT Core in Production: How We Built OTA Firmware Pipelines for 300+ Physical EV Chargers
Most articles about AWS IoT Core are written by people who started with it from day one.
We didn't. We started with a raw MQTT broker, hit its limits across four dimensions simultaneously, and migrated to IoT Core mid-production. That migration — and everything we learned building OTA infrastructure for 300+ deployed EV chargers afterward — is what this article covers.
This is not a tutorial. It is a production architecture guide written by someone who owned this system end-to-end.
Two Things You Need to Know Before We Start
If you come from a DevOps or cloud background without IoT experience, two terms need a quick definition before this article makes full sense.
AWS IoT Coreis Amazon's managed cloud service for connecting, managing, and communicating with physical devices at scale. Think of it as the cloud backbone for your device fleet — it handles device registration, MQTT messaging, device...
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