EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·10d ago·5 min read
Driving the GDEH0154D67 e-paper display with Rust
TL;DR
A developer rewrote the firmware for the SQFMI Watchy e-paper watch in Rust to improve functionality and overcome limitations of the original C++ code. This transition allowed for better control over the display and sensors, enhancing the watch's capabilities.
✦ Why It Matters
Consider exploring Rust for your next embedded systems project to enhance performance and maintainability.
Key Takeaways
- Explore Rust for embedded systems to improve code safety.
- Utilize open-source firmware to customize hardware functionality.
- Implement deep sleep mode for better battery management.
- Leverage Docker for managing complex development environments.
Full Summary
The SQFMI Watchy is an open-source e-paper smartwatch powered by an ESP32 microcontroller, originally programmed in C++ using Arduino libraries. The developer faced challenges with the existing firmware, including poor documentation and limited functionality, prompting a decision to rewrite it in Rust, a systems programming language known for safety and concurrency.
Initially, Rust support for ESP32 was experimental, leading to difficulties in implementing essential features like deep sleep mode. After overcoming setup hurdles with Espressif's LLVM and rustc, the developer successfully created a more robust firmware.
This new implementation allows for customizable watch faces, notifications via Bluetooth Low Energy (BLE), and configurable alarms, significantly enhancing the user experience. The project highlights the potential of Rust in embedded systems, particularly for developers seeking better control and reliability.