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Shawn Hymel

@shawnhymel.bsky.social

1.5K followers 790 following 260 posts

Embedded Systems Educator & Course Developer | #IoT #EdgeAI | https://linktr.ee/shawnhymel

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Shawn Hymel @shawnhymel.bsky.social · Jul 29

I'm excited to announce my new course! 🚀 "IoT Firmware Development with ESP32 and ESP-IDF" is designed to take you beyond Arduino to building professional #IoT devices with #WiFi, HTTP/HTTPS, MQTT, and SSL/TLS.
👇
learnembedded.dev/courses/iot-...

#ESP32 #microcontroller #embedded #programming

IoT Firmware Development with ESP32 and ESP-IDF

Build Real IoT Devices. Master the Toolchain. Get Certified. Unlock the full potential of the ESP32 by learning how to write production-grade firmware using ...

learnembedded.dev

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Shawn Hymel @shawnhymel.bsky.social · 2d

If you are headed to @hackaday-feed.bsky.social #Supercon later this month and you've been curious about #Rust, check out my workshop! There are still seats available. You'll get a #RaspberryPiPico kit to take home and continue your embedded Rust journey 🦀
👇
hackaday.io/superconfere...

#embedded

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Shawn Hymel @shawnhymel.bsky.social · 5d

My latest tutorial is out! How to write a custom #WiFi driver from scratch on the #ESP32 using ESP-IDF. It involves a lot of event-driven code!
👇👇👇
shawnhymel.com/2967/esp32-c...

#IoT #microcontroller #embedded #programming #firmware

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Shawn Hymel @shawnhymel.bsky.social · 9d

New #ROS video out! In it, I walk through the process of creating custom publisher and subscriber nodes in Python to communicate over topics. Check it out!
👇👇👇
www.youtube.com/watch?v=9_Aa...

#robotics #Python #programming @openrobotics.bsky.social

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Shawn Hymel @shawnhymel.bsky.social · 12d

I'm just now learning about @meshtastic.org, an open-source project that uses #LoRa radios to create off-grid text networks. I wrote a blog post about it and ordered a @seeedstudio.com T1000-E to play with at @hackadayofficial.bsky.social #Supercon!

shawnhymel.com/2962/what-is...

#IoT #embedded

What is Meshtastic? - Shawn Hymel

A few years ago, James Provost built a handheld texting device, based on Arduino, to send short messages over a connected ham radio set. One of my many

shawnhymel.com

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Shawn Hymel @shawnhymel.bsky.social · 16d

lol nah, this was Kicad’s intended purpose 😜

Shawn Hymel @shawnhymel.bsky.social · 16d

SHOW ME WHAT YOU GOT

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Shawn Hymel @shawnhymel.bsky.social · 17d

Progress! #PCB #KiCad

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Shawn Hymel @shawnhymel.bsky.social · 19d

My latest tutorial is out! How to use I2C on the #ESP32. I show how to talk to a real TMP102 sensor using #ESPIDF (and a virtual TMP105 sensor with #QEMU).
👇👇👇
shawnhymel.com/2954/esp32-h...

#IoT #microcontroller #embedded #programming #firmware

Shawn Hymel @shawnhymel.bsky.social · 19d

It's been YEARS since I've done a board layout. It feels good to use these skills again! 💪 I'm making something fun for @hackaday-feed.bsky.social #Supercon 🤓 And of course, I have to use #KiCad 😁

#PCB #SAO #BadgeLife

Shawn Hymel @shawnhymel.bsky.social · 24d

New #ROS video out today! I go over the basics of topics and services with the command line in ROS 2. Check it out!
👇👇👇
www.youtube.com/watch?v=HTIc...

#robotics #electronics #programming #embedded @openrobotics.bsky.social

Shawn Hymel @shawnhymel.bsky.social · 29d

Finally figured out how to do bare metal hardware interrupt in embedded #Rust 😅😅😅 I think I’m gonna stick with Embassy…

#embedded #microcontroller #rp2350 #RaspberryPiPico

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Shawn Hymel @shawnhymel.bsky.social · Sep 9

Kconfig is a powerful tool that's been around for a while, and many #embedded frameworks (including ESP-IDF) have adopted it for configuring components. Check out my tutorial and video to see how to use it for your #ESP32 projects!
👇
shawnhymel.com/2935/esp32-h...

#IoT #programming

Shawn Hymel @shawnhymel.bsky.social · Sep 4

I'm excited to announce my next video series! If you've been following my feed, you probably know that I was playing around with #ROS. Well, here is the first video from all that learning and tinkering:
👇👇👇
www.youtube.com/watch?v=mjrx...

#robot #robotics #embedded #programming #RaspberryPi

Introduction to ROS Part 1: What is the Robot Operating System? | DigiKey

YouTube video by DigiKey

www.youtube.com

Shawn Hymel @shawnhymel.bsky.social · Sep 2

Choosing between a bare-metal approach and a real-time operating system (#RTOS) can be tricky. An RTOS is great for high complexity and strict timing, while simpler projects may benefit from a bare-metal superloop.
👇
shawnhymel.com/2928/when-to...

#embedded #embeddedsystems #Zephyr #IoT

When to Use an RTOS: An Important Decision for Embedded Projects - Shawn Hymel

The world of embedded systems seems to be composed of two types of developers: those who love real-time operating systems (RTOSs) and those that despise them,

shawnhymel.com

Shawn Hymel @shawnhymel.bsky.social · Aug 26

In #ESPIDF, `idf.py build` calls CMake under the hood. Ignoring Kconfig parameters, you can manually build #ESP32 projects with:

cmake -DIDF_TARGET=esp32s3 -G "Ninja" -S . -B build/
cmake --build build/

Check out my full post: shawnhymel.com/2920/esp32-h... #IoT #embedded

Shawn Hymel @shawnhymel.bsky.social · Aug 25

Awesome, thank you! ❤️

Shawn Hymel @shawnhymel.bsky.social · Aug 25

Good point--I've seen both. High to low addresses might make more sense.

Shawn Hymel @shawnhymel.bsky.social · Aug 24

I think I understand how the #RP2350 memory is mapped. If I missed something, let me know! #RaspberryPi #RaspberryPiPico

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Shawn Hymel @shawnhymel.bsky.social · Aug 24

Good catch, thanks! The plan is to show the subsequent use of `reading` on lines 78 and 79, which would be an error on line 73. I added a note on (now) line 78 about trying to use `reading` after a move. Hopefully that's clearer.

Shawn Hymel @shawnhymel.bsky.social · Aug 23

I think I've *finally* wrapped my head around the basic ownership and borrowing rules in #Rust. I put together a quick demo here: gist.github.com/ShawnHymel/e.... I know there are some esoteric rules I likely missed, but these should be the major ones. Let me know if I missed something! #programming

Rust ownership and borrowing rules demonstration

Rust ownership and borrowing rules demonstration. GitHub Gist: instantly share code, notes, and snippets.

gist.github.com

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Shawn Hymel @shawnhymel.bsky.social · Aug 17

Cool! Thats such an amazing memory ❤️ There’s something so satisfying about the *CHUG-chug-chug-chug* sound of the engine.

Shawn Hymel @shawnhymel.bsky.social · Aug 17

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Shawn Hymel @shawnhymel.bsky.social · Aug 17

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Shawn Hymel @shawnhymel.bsky.social · Aug 17

Had a blast doing the Georgetown Loop yesterday! Steam locomotives are ❤️ #Colorado

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