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.

https://learnembedded.dev/courses/iot-firmware-development-with-esp32-and-esp-idf/

Dear Lazyweb,
What 32-bit #microcontroller (i.e., Cortex-M or RV32, not a Linux application processor) has the highest Coremark/mW, or lowest uA/MHz? A quick search suggests Ambiq Apollo 4 or ST STM32U3, but are there others I should look at?
I want the maximum CPU performance I can get powered by a CR2032 coin cell at under 1 mA current. (CR2032 useful lifetime decreases dramatically above that.)

Our second episode of #DayGlowShow streams live July 10 at noon Pacific (tomorrow / 7pm UTC)!

@ishotjr and I are digging into the #PicoCalc – a #microcontroller development platform based on the #RaspberryPi Pico. Plus, reflections from #Teardown2025

YT: https://www.youtube.com/watch?v=sPp7DoGUKdI&list=PLwWiFinxwDlgomKdWjfaavDbMRdhHhfqQ&index=2
LinkedIn: https://www.linkedin.com/events/7348491364998750209/comments https://chaos.social/@alexglow/114675046320716100

Lichtspiele

Letzte Woche habe ich renoviert, denn mein Sohn sollte in das Zimmer seiner Schwester umziehen die nun bei ihrem Freund wohnt. Und ein Wunsch des Sohnes war ein LED-Streifen, im alten Zimmer hatten wir einen billigen Streifen aus dem Baumarkt direkt an sein Hochbett geklebt, für das neue Zimmer hatte ich aber besseres im Sinn.

Proof of Concept

https://koenig-haunstetten.de/2025/07/07/lichtspiele-2/

7-Segment-Anzeige Grove TM1637 mit #Microcontroller NodeMCU LoLin V3 #ESP8266. Es wird über WiFi eine Verbindung ins Internet aufbebaut und von einem NTP-Server die aktuelle Uhrzeit geholt. Danach zählt der Prozessor selbst weiter und zeigt die Uhrzeit an.
Nachdem es technisch funktioniert hat, habe ich selbst aus Klemmbausteinen ein würfel-förmiges Gehäuse gebaut. #diy

Thursday...and that means a new #Zephyr video I cover using LCD drivers and LVGL to make basic GUIs. Check it out!

https://youtu.be/Kfgln6RdoYc

#IoT #microcontroller #electronics #embedded #RTOS @zephyr

Update on the Finder and UF2 files... it can also cause slowdowns as well as lockups.

https://rasterweb.net/raster/2025/05/04/macos-finder-and-usb-flashing-format-uf2/

I wrote up a post about the issues I've been having with macOS and the USB Flashing Format (UF2) file type.

https://rasterweb.net/raster/2025/05/04/macos-finder-and-usb-flashing-format-uf2/

New #Zephyr video! One big benefit of using an #RTOS is the ability to run multiple threads, and that's exactly what I cover. Check out the full video!

https://www.youtube.com/watch?v=3OSKV2jrAHM

#embedded #microcontroller #ESP32 #IoT @zephyr

Tomorrow is the day! Come hang out and learn about writing device drivers in #Zephyr. Even if you don't have hardware, you can still follow along. And yes, the webinar will be recorded.

https://event.on24.com/wcc/r/4870160/B0654D058D6BC12D5A08B9607370682A?partnerref=sh3

In my latest #Zephyr video, I demonstrate how to connect OpenOCD to GDB and perform step-through debugging. It takes a little bit of configuring, but the toolchain is worth it for #embedded #programming.

https://www.youtube.com/watch?v=XGTtMYa7IiM

#IoT #microcontroller #ESP32
@zephyr

This is ... interesting. MCU software development for improvised computers in a post-SHTF world.

collapseos.org

#TexasInstruments just released a #microcontroller so small you could lose it in your pocket. The #MSPM0C1104 is only 1.38 mm², smaller than a grain of rice, but still acts as a tiny computer. It has a 32-bit processor running at 24 MHz, with 1KB of memory and 16KB of storage. It can even sense things like temperature or movement. Power use is minimal, running on just 87μA per MHz and dropping to 5μA in standby. This makes it ideal for tiny devices that need to last a long time on small batteries. It is also built to handle extreme conditions, working in temperatures from –40°C to 125°C. https://www.ti.com/product/MSPM0C1104

“Raspberry Pi RP2350 #microcontroller now available to mere mortals: ‘There are also #RP2350-based devices out there, such as the Thumby Color, a wearable keychain controller with a 128x128 16-bit color screen.

Upton wrote: "One of the coolest things about working at #RaspberryPi is seeing the brilliant products and projects that businesses and hobbyists create using our technology.’”

#hardware / #silicon <https://theregister.com/2025/03/18/raspberry_rp2350_microcontroller_now_available/>

I just backed this project on Kickstarter: https://www.kickstarter.com/projects/openmv/openmv-n6-and-ae3-low-power-python-programmable-ai-cameras

OpenMV LLC makes some incredibly powerful, small-form-factor #IoT cameras perfect for tinkering, prototyping, and making slick projects. I taught my Computer Vision with #AI course using their cameras. I'm excited about this new series: full object detection for a few mW. #EdgeAI #ComputerVision #Arduino #MicroPython #embedded #microcontroller

Wieder einen Meilenstein erreicht. Schaltung in Gehäuse eingebaut, ich habe einfache eine Blechdose genommen. Dann noch den Microcontroller ProMicro anstatt dem Arduino programmieren. Dazu habe ich 4 Tage investieren müssen, und jetzt läuft's! #microController #Elektronik #diy

TI's tiny #microcontroller is the world's smallest and costs less than 20 cents - https://www.zdnet.com/article/tis-tiny-microcontroller-is-the-worlds-smallest-and-costs-less-than-20-cents/ " This remarkable device is only a little larger than a pepper flake." insane

Digging through an old box and found these from back when I'd get any new microcontroller... sigh. Anyone have a use for them?

#microcontroller #electronics #maker

Right, some initial notes on these #RP2350 Melopero Perpetuo #LoRa boards: https://yvan.seth.id.au/melopero-perpetuo-first-notes.html

Long story short: they work... I can make LEDs flash, that's the key thing... right? Can also read the internal temperature sensor and check battery status.

A few "bugs" in the examples and a slightly faulty board.

So far, so good... Next job is to get one of them transmitting the temp and battery status to the other. Will need to think about how to "package" that data for reliable tx/rx, probably need some redundancy, etc, maybe a buffer window of data. Then I need to dig out some of my various sensors and decide what to hook up to the "remote" to send to the local. The local will probably then relay data to a connected computer via the serial console I guess.

Project #Polytunnel Telemetry is GO! Well, if I can get a signal that far, otherwise this becomes project #Greenhouse Telemetry... the greenhouse is about 30 metres away, the polytunnel is a kilometre.

Und die 7-Segment-Anzeige geht auch 2stellig! Was für ein Hexenwerk!
#Arduino #microController #diy