Refrigerated Fleet Telemetry

A logistics company operates 3 million refrigerated trucks, and each truck sends temperature and GPS information every 10 seconds. The platform must receive millions of messages, cope with devices connecting and disconnecting constantly, process telemetry in near real time, raise an alert whenever a temperature crosses a threshold, keep the history for analytics, and drive a dashboard showing the current status of every truck. The fleet is expected to reach 10 million devices, and the company does not want to operate persistent servers responsible for maintaining device connections.