SafeSac

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  An overhead view of the completed circuit.

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  An alternate overhead view of the completed circuit.

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  Another prototyping attempt.

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  Our team prototyping with the projects.

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  A prototype of the 3D-printed chassis (coming soon!)

Inspiration

Walking around our university campus, we noticed the prevalence of signage recommending students to supervise their belongings. We recognized this as an issue affecting our colleagues which we could solve using our current electronics and coding knowledge.

What it does

SafeSac is the perfect way to alert others, as well as yourself, of an intruder tampering with your bag. You can use the companion app to disable or enable its features. When you turn it on, the app notifies you if the bag moves without your authorization, and makes a loud beep. A similar thing occurs when the bag is opened, using the Reed switch and a magnet connected to a zipper.

How we built it

We built it using ESP32 and multiple components, including an IMU and a Reed magnetic switch. We programmed it using the Arduino IDE.

Challenges we ran into

As first-time users of the ESP32, we took some time getting used to the small differences in working with the board, but we were able to get up and running relatively quickly. Working with the IMU was also a challenge at the start, but we were able to utilize it in a way that detects differences in acceleration magnitudes.

Accomplishments that we're proud of

We are proud of being able to complete this project, and were able to implement a relatively complex project in our very first hackathon.

What we learned

We learned a lot about using ESP32, and Blynk as well. We also gained a lot of knowledge about programming and elementary electronics.

What's next for SafeSac

Adding a GPS sensor is something we would love to implement in the future, to track how far away the bag is, and allow you to relocate it.

Built With

• adafruit-mpu6050
• blynk
• c
• esp32