A university campus deploys 120 room temperature sensors (reporting every 5 minutes), 20 lecture hall CO₂ sensors (reporting every 2 minutes), and 8 building electricity meters (reporting every minute). The CO₂ sensors trigger ventilation alerts when readings exceed 1,000 parts per million, and the alert must reach the facilities team within 5 minutes. The campus has reliable Wi-Fi but occasionally experiences brief internet outages lasting 10 to 20 minutes. Which architecture decision best addresses both the alert requirement and the connectivity risk?

Question

Accepted Answer

Process CO₂ threshold checks at a local edge server that can issue alerts independently of internet connectivity, while sending all other sensor data to the cloud for storage and trend analysis

Answer

Store all sensor data locally on the edge server permanently and eliminate cloud connectivity entirely

Answer

Reduce the CO₂ reporting interval to every 15 minutes so that less data is affected during an internet outage

Answer

Send all sensor data directly to the cloud and rely on the cloud to check CO₂ thresholds, because Wi-Fi is generally reliable

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A university campus deploys 120 room temperature sensors (reporting every 5 minu...

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