Email alerts on sensor thresholds in Raspberry Pi - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the main purpose of setting email alerts on sensor thresholds?

To notify users immediately when a sensor value goes above or below a set limit, helping to take quick action.

beginner

Which Python library is commonly used on Raspberry Pi to send emails?

The smtplib library is commonly used to send emails from Python scripts on Raspberry Pi.

beginner

Why do we check sensor values against thresholds in code?

To decide if the sensor reading is normal or if it needs attention, triggering alerts only when necessary.

intermediate

What information do you need to send an email alert from Raspberry Pi?

You need the SMTP server address, sender email, receiver email, and login credentials if required.

intermediate

How can you avoid sending too many email alerts when sensor values fluctuate around the threshold?

By adding a delay or checking if the alert was already sent recently to prevent repeated emails.

Which Python module helps send emails from Raspberry Pi?

A time

B os

C smtplib

D random

The smtplib module is used to send emails using SMTP protocol.

What should you compare sensor data against to trigger an email alert?

A Random numbers

B Threshold values

C Current time

D Sensor ID

Threshold values define limits that, when crossed, trigger alerts.

Which of these is NOT needed to send an email alert?

A Receiver email address

B Sender email address

C SMTP server address

D Sensor calibration data

Sensor calibration data is unrelated to sending emails.

How can you prevent sending too many emails when sensor values hover near the threshold?

A Add a delay or cooldown between alerts

B Send emails every second

C Ignore sensor data

D Change the sensor

Adding a cooldown prevents repeated alerts for small fluctuations.

What is a good reason to use email alerts on Raspberry Pi sensors?

A To get notified remotely about important sensor changes

B To increase sensor power

C To slow down the sensor

D To decorate the Raspberry Pi

Email alerts help users get notified remotely about sensor conditions.

Explain how you would set up an email alert system on a Raspberry Pi to notify when a temperature sensor exceeds a threshold.

Think about the steps from reading the sensor to sending the email.

Describe why it is important to manage how often email alerts are sent when monitoring sensor thresholds.

Consider what happens if alerts are sent too frequently.