Wrap-Up and Next Steps

What You Learned

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The Mental Model

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Instantiate → Configure → Control — it works for every peripheral, every HAL, every driver crate.

The Ecosystem Layers

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BSP → Driver Crates → embedded-hal → HAL → PAC → Hardware

You now know what each layer does and how to read its documentation.

The Skills

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• Navigate crate documentation to find peripheral modules, examples, driver structs, and methods
• Apply the mental model across different HALs — you compared esp-hal, rp2040-hal, and stm32f4xx-hal
• Use the BSP layer to simplify the pattern to Instantiate → Control

The Workflow

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Find a basic example → Apply the mental model → Map to documentation → Modify

The example shows ONE way. The docs show ALL ways. Your job is to explore.

Where to Go From Here

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Keep Learning

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Your ESP32-C3 board has more peripherals to explore:

• SPI — faster serial communication (displays, SD cards)
• ADC — read analog values (potentiometers, light sensors)
• PWM — control LED brightness, servo motors
• ESP-NOW — wireless communication between ESP32 devices

Same pattern: find the module in esp-hal docs, Instantiate → Configure → Control.

Dig Deeper

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For a more comprehensive guide, check out the Simplified Embedded Rust: ESP Core Library Edition book.

Level Up with Async

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Embassy is an async runtime for embedded Rust. Instead of interrupt handlers with mutexes, you write async/await code:

// Instead of interrupt handler + AtomicBool flag:
let level = button.wait_for_falling_edge().await;
led.toggle();

Check out embassy.dev and the embassy-executor crate.

Stay Connected

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• The Embedded Rustacean — hi@theembeddedrustacean.com
• Newsletter — theembeddedrustacean.com/subscribe
• LinkedIn — The Embedded Rustacean
• Bluesky — @theembeddedrust.bsky.social

Thank you for attending. Now go build something.