Arduino Nano RP2040 Alarm Detection and Notification (for bread maker)

This project uses the Arduino Nano RP2040 Connect to detect the beep sound of a bread maker (Panasonic SD-MDX4-K [Home Bakery Bistro]) and send a notification via Pushover. It detects frequency & duration of alarm to only pick up an alarm from the machine.

For detailed instructions, code, and explanation, visit the blog post.

Key Features

• Detects specific audio frequencies using FFT.
• Analyzes beep duration to reduce false positives.
• Sends real-time notifications using the Pushover API.

Acknowledgement

Code to perform FFT (ApproxFFT.ino) is from Instructables, https://www.instructables.com/ApproxFFT-Fastest-FFT-Function-for-Arduino/, by abhilash_patel

References

• Example of detecting sounds and sending notifications: マイコン技術Navi: 【ESP32】特定の音が鳴ったらLINEで通知する（ご飯よ〜！を家族全員にお知らせシステム）
• FFT for analyzing beep sound: Instructables
• Get clock time: DigiKey