Serving sensor data as JSON API in Raspberry Pi - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a JSON API in the context of serving sensor data?

A JSON API is a way to send sensor data from a Raspberry Pi to other devices using a simple text format called JSON. It makes data easy to read and use by programs.

beginner

Why use JSON format to serve sensor data?

JSON is easy to read for both humans and computers. It is lightweight and works well over the internet, making it perfect for sharing sensor data from a Raspberry Pi.

beginner

Which Python library is commonly used on Raspberry Pi to create a simple JSON API?

Flask is a popular Python library used to create web servers that can serve JSON data easily on a Raspberry Pi.

intermediate

How do you convert sensor readings into JSON format in Python?

You can use Python's built-in json module. For example, use json.dumps() to turn a Python dictionary of sensor readings into a JSON string.

beginner

What is the role of an endpoint in a JSON API?

An endpoint is a specific URL on the Raspberry Pi server where sensor data is available. When you visit this URL, you get the sensor data in JSON format.

What does JSON stand for?

A JavaScript Online Network

B Java Standard Output Network

C JavaScript Object Notation

D Java Object Notation

JSON stands for JavaScript Object Notation, a lightweight data format.

Which Python library helps create a web server to serve JSON data on Raspberry Pi?

A Matplotlib

B NumPy

C Pandas

D Flask

Flask is a lightweight web framework used to create servers that can serve JSON data.

What is the main purpose of an API endpoint?

A To provide a URL where data can be accessed

B To store sensor hardware

C To convert data to binary

D To power the Raspberry Pi

An endpoint is a URL where clients can request and receive data.

Which Python function converts a dictionary to a JSON string?

A json.load()

B json.dumps()

C json.parse()

D json.read()

json.dumps() converts Python objects to JSON strings.

Why is JSON a good choice for sensor data sharing?

A It is easy to read and lightweight

B It is heavy and complex

C It only works on Raspberry Pi

D It requires special software to read

JSON is easy to read and lightweight, making it ideal for sharing data.

Explain how you would set up a simple JSON API on a Raspberry Pi to serve temperature sensor data.

Think about reading data, converting it, and making it available via a web address.

Describe the benefits of serving sensor data as a JSON API compared to other methods.

Consider why JSON is popular for data sharing.