Publishing sensor data in Raspberry Pi - Mini Project: Build & Apply

Publishing sensor data

📖 Scenario: You have a Raspberry Pi connected to a temperature sensor. You want to collect the temperature readings and send them to a server for monitoring.

🎯 Goal: Build a simple Python program that reads temperature data from a sensor, prepares it for sending, and prints the data to simulate publishing it.

📋 What You'll Learn

Create a dictionary with sensor data

Add a configuration variable for the sensor ID

Use a dictionary comprehension to prepare the data for publishing

Print the final data dictionary

💡 Why This Matters

🌍 Real World

This project shows how Raspberry Pi can collect and prepare sensor data for sending to monitoring systems.

💼 Career

Skills in handling sensor data and preparing it for communication are important for IoT and embedded systems jobs.

1

Create sensor data dictionary

Create a dictionary called sensor_data with these exact entries: 'temperature': 22.5, 'humidity': 45, 'pressure': 1013

Raspberry Pi

# Your code here

Need a hint?

Use curly braces to create a dictionary with keys and values.

2

Add sensor ID configuration

Create a variable called sensor_id and set it to the string 'sensor_01'

Raspberry Pi

sensor_data = {'temperature': 22.5, 'humidity': 45, 'pressure': 1013}
# Your code here

Need a hint?

Assign the string 'sensor_01' to the variable sensor_id.

3

Prepare data for publishing

Create a new dictionary called publish_data using a dictionary comprehension that copies all items from sensor_data and adds a new key 'id' with the value from sensor_id

Raspberry Pi

sensor_data = {'temperature': 22.5, 'humidity': 45, 'pressure': 1013}
sensor_id = 'sensor_01'
# Your code here

Need a hint?

Use a dictionary comprehension to copy sensor_data, then add the 'id' key.

4

Print the published data

Write a print statement to display the publish_data dictionary

Raspberry Pi

sensor_data = {'temperature': 22.5, 'humidity': 45, 'pressure': 1013}
sensor_id = 'sensor_01'
publish_data = {key: value for key, value in sensor_data.items()}
publish_data['id'] = sensor_id
# Your code here

Need a hint?

Use print(publish_data) to show the final dictionary.