Embedded communication
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Flip to reveal answersCompare Bluetooth, Wi-Fi and 5G on range and power.
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All 4 Flashcards — Embedded communication
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Question
Compare Bluetooth, Wi-Fi and 5G on range and power.
Answer
Bluetooth about 10 m at very low power; Wi-Fi tens of metres at moderate to high power; 5G kilometres at high power. Reaching further always costs energy.
Question
What does each protocol require to work?
Answer
Bluetooth needs only the other device. Wi-Fi needs a router and a network. Cellular needs a network operator, a subscription and a SIM.
Question
Which three questions choose a protocol?
Answer
Is it battery-powered and must it last? Is it mains-powered inside a building with a network? Does it move, or is there no local network to join?
Question
What is the design rule for a connected product?
Answer
Keep the core function working without the network — a doorbell should still ring from its button if the server goes away.
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Topic 7.4 hub
Electronic systems applied
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Design Technology exam skills
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