Grapesss: a physical Shamir's Secret Sharing application [ESP32-C3 + Mobile] by ecandino

Description

A couple of years ago I created StegoSecretS, a small cli used to encrypt and split a secret into multiple keys, using the Shamir's Secret Sharing algorithm.

The idea is to re-implement the project using physical devices. One device alone will be useless, but when close together they can be used to decrypt the secret.

On a practical side the user encrypts the secret with a mobile application. The same application is used to split the secret, and load the partial keys into different micro-controllers. Another user will be able to decrypt the secret only having at least N devices close together (using the application).

I'm planning to use a couple of ESP32-C3 I bought, and build a very simple Android mobile application.

Goals

• Learn about Rust and micro-controllers (ESP32-C3)
• Learn about mobile applications (Android and Kotlin)

Resources

• Shamir's Secret Sharing
• The esp-rs Book
• Android - Kotlin

Capyboard, ESP32 Development Board for Education by emiler

Description

Capyboard is an ESP32 development board built to accept individual custom-made modules. The board is created primarily for use in education, where you want to focus on embedded programming instead of spending time with connecting cables and parts on a breadboard, as you would with Arduino and other such devices. The board is not limited only to education and it can be used to build, for instance, a very powerful internal meteo-station and so on.

I already have one initial prototype ready and tested. The next iteration addresses several issues the first prototype had. I am planning on finishing up the mainboard and one of the modules this week.

This project is also a part of my master's thesis.

Goals

• Finish testing of a new prototype
• Publish source files
• Documentation completion
• Finish writing thesis

Resources

• github.com/realcharmer/capyboard
• github.com/realcharmer/capyboard-starter
• github.com/realcharmer/capyboard-docs
• docs.capyboard.dev

Lawndon - Recycled electric mower converted into a 3D printable and autonomous hill climbing mower. by jordonleach

Description

Lawndon is currently a remote controlled mower built from a recycled electric push mower and modified with 3D printable parts. The main idea is to have a high torque, low power mower to be efficient and powerful enough to climb hills. Previous iterations have progressed the original idea into a 4x4 mower with printable tank tracks.

> Continuation of lawndon project.

Goals

My goal this year is to begin implementing autonomous capabilities that are economical and easily reproducible without the requirement of using GNSS. I plan on utilizing UWB technology to run the triangulation necessary for automatic navigation of the mower.

Update

I successfully built a few mechanisms to triangulate the position of a UWB tag using 3 anchors, along with a node.js backend and Vue.js frontend to display in real-time the position of the tag related to the anchors.

View post here: https://github.com/jordojordo/lawndon/wiki/Videos#nov-22nd-2024

Resources

Visit the Lawndon repository for information.