Capstone & Resources · Study deck
IoT Glossary: Terms From S Through V
A design review now covers sensors, security, storage, and wireless links.
Sammy is your guide for this deck.
After studying this chapter
Learning objectives
You will be able to:
- Explain: In simple terms: Computing without managing servers - write code that runs when needed without worrying about servers, scaling, or paying for idle time, like renting a taxi versus owning a car.
- Explain: In simple terms: A digital key card - proves who you are and what you're allowed to do, like a badge that gets you through certain doors for a limited time.
- Explain: In simple terms: Packing for shipment - converting complex data into a flat format that can be sent over a network or saved to disk, then unpacking it at the destination.
Major section
S
In simple terms: Hub-and-spoke design - every device connects to one central point, like streets radiating from a town center.
- Definition: The process of converting continuous signals into discrete values at regular intervals, with sampling rate determining how often measurements are taken.
- In simple terms: A data template - specifies what fields data should have and what types they should be, like a form that defines required fields and their formats.
- Simple, but the center becomes a critical dependency.
Major section
S (continued)
Definition: A proprietary LPWAN technology using ultra-narrowband modulation for very low-power, low-throughput IoT communication, associated with operated network services where coverage is available.
- Definition: A device that detects and measures physical properties (temperature, light, motion, pressure) and converts them into electrical signals that can be processed by electronic systems.
- In simple terms: Packing for shipment - converting complex data into a flat format that can be sent over a network or saved to disk, then unpacking it at the destination.
- In simple terms: A managed low-data IoT network - like a phone-network model for simple sensors, intended for devices that send very small payloads infrequently.
Major section
S (continued)
In simple terms: Computing without managing servers - write code that runs when needed without worrying about servers, scaling, or paying for idle time, like renting a taxi versus owning a car.
- Definition: A synchronous serial communication interface using four wires (clock, data in, data out, select) for high-speed communication between a microcontroller and peripheral devices.
- In simple terms: Fast wired communication - uses more wires than I2C but is faster, good for sensors and displays that need to transfer lots of data quickly.
- Definition: A client in publish-subscribe messaging that registers interest in specific topics and receives messages published to those topics, without direct connection to publishers.
Major section
T
Definition: The actual rate at which data is successfully transferred over a network connection, typically lower than bandwidth due to protocol overhead, errors, and congestion.
- In simple terms: Real-world speed - while bandwidth is the maximum theoretical capacity, throughput is how fast data actually moves in practice, accounting for all the overhead and delays.
- In simple terms: Data ordered by time - measurements collected over time, like temperature readings every minute, stored in time order so you can see trends and patterns.
- Definition: An open-source time series database built on PostgreSQL, combining full SQL support with time series optimizations for IoT, monitoring, and analytics workloads.
Major section
T (continued)
In simple terms: SQL-friendly time series database - handles sensor data efficiently while letting you use familiar SQL queries and benefiting from PostgreSQL's ecosystem.
- In simple terms: A date-time stamp - marks when something happened, like the postmark on a letter, essential for knowing when sensor readings were taken.
- In simple terms: A digital key card - proves who you are and what you're allowed to do, like a badge that gets you through certain doors for a limited time.
- Definition: A named channel or subject in publish-subscribe messaging systems that publishers send messages to and subscribers receive messages from, enabling message routing.
Deck summary
Key takeaways
In simple terms: Hub-and-spoke design - every device connects to one central point, like streets radiating from a town center.
- Definition: A proprietary LPWAN technology using ultra-narrowband modulation for very low-power, low-throughput IoT communication, associated with operated network services where coverage is available.
- In simple terms: Computing without managing servers - write code that runs when needed without worrying about servers, scaling, or paying for idle time, like renting a taxi versus owning a car.
- Definition: The actual rate at which data is successfully transferred over a network connection, typically lower than bandwidth due to protocol overhead, errors, and congestion.
Retrieval practice
Recall check
Test Tessa says: answer from memory, then check your reasoning.
Q1A smart building has 500 sensors, each sending temperature, humidity, and CO2 every 30 seconds. Operations needs 24-hour averages, retention and downsampling policies in the database service, and no custom rollup jobs or extensions for the first release. Which option most directly fits?
Show answer
Answer: C The workload is 500 x 3 x 2 = 3,000 metric readings per minute.
Print reference
Answers
Answer key.
- C · The workload is 500 x 3 x 2 = 3,000 metric readings per minute.