ICYMI Python on Microcontrollers Newsletter: ALICE grabs and LOTS of projects! #Python #Adafruit #CircuitPython #ICYMI @micropython @ThePSF

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Happy Solstice! It’s time for the latest Python for Microcontrollers newsletter, brought you by the community! We’re on Discord, Twitter, and for past newsletters – view them all here. If you’re reading this on the web, subscribe here. Let’s get started!

ALICE the Robot learns to grip with CircuitPython


ALICE is a Kinect controlled FPV mini-mech. Her creator, Scott, is teaching ALICE to finally get a grip.

Powered by CircuitPython on Adafruit Feather – Twitter

ALICE’s code can be found on GitHub and she’s on Facebook.

The December 2020 release of the Python extension for VScode is out

Python extension for VScode

The December 2020 release of the Python extension for VScode is out.

This release closed 13 issues and includes:

  • Extract method and variable code actions with Pylance
  • Pylance insiders program
  • Ipywidgets support in Native Notebooks

More Microsoft Blog via Twitter.

GitHub now supports MOV and MP4 video

GitHub supports MOV and MP4

GitHub now supports MOV and MP4 with a maximum size of 10Mb. Being able to share screencasts, wiring, step by step, and use video in documentation is something Adafruit does wherever they can, and now it’s part of GitHub. With video now part of GitHub, Adafruit will be able to document better, share more, and have more content that helps people.

Communities can also use video to tell their story, maximize social coding together, and really enhance anything that is on GitHub – Adafruit Blog

CircuitPython Deep Dive Stream with Scott Shawcroft

Deep Dive with Scott

This week, Scott streams his work unboxing and ESP32-S2 Bug Hunting.

You can see the latest video and past videos on the Adafruit YouTube channel under the Deep Dive playlist – YouTube.

Adafruit Update


Adafruit is stocked and shipping orders!

Need a last minute gift? An Adafruit Gift Certificate is always welcome and available fast – Adafruit.

Or perhaps your Internet of Things is growing? An Adafruit IO+ subscription is a great bump in capability and extras – Adafruit IO+.

Shop Adafruit now

Brain interpretation of code

Brain interpretation of code

To the brain, reading computer code is not the same as reading language. Neuroscientists find that interpreting code activates a general-purpose brain network, but not language-processing centers. The two programming languages that the researchers focused on in this study are known for their readability — Python and ScratchJr – MIT News.

News from around the web!

Boot manager for the MagTag

A boot manager for the Adafruit MagTag – choose between many project from the Adafruit Learning System. With a little bit of CircuitPython in code.py, holding a button and turning on select one usage of the connected eInk display – Twitter and GitHub.


zoomout – a pull switch (or BYO button) that gets you out of video calls, quick. Uses an Adafruit Feather nRF52840 Express running CircuitPython – Twitter and GitHub.

Dripping icicles

Mark ported PaintYourDragon’s dripping icicle code to CircuitPython – Twitter and GitHub.

eInk display partial refresh on the MagTag

Trying out partial refresh in Arduino on the Adafruit MagTagTwitter.

CircuitPython first time tweet

Using CircuitPython the first time to program an Adafruit QT PyTwitter.

Control your TV

Control your TV using The Force! Build a gesture-controlled remote with an Adafruit Feather M4 Express and CircuitPython – sudomod.

Fortnite boogie bomb

WIP: Fortnite boogie bomb from RayGunProject for my 8 year old niece with an Adafruit Feather M0 Express + PropMaker FeatherWing. It lights! It will sound! Now to work on code in CircuitPython! – Twitter.

OpenBook ESP32-S2

Designing the ESP32-S2 Open Book – Twitter.

Cedar Grove Studios

Assembling and testing some PCBs with an Adafruit CLUE and ADC board – Twitter.

Play T-Rex game on Google Chrome

Play a T-Rex game on Google Chrome using Seeeduino XIAO (programmed in CircuitPython) and LIS3DH accelerometerHackster.io via Twitter.

Analog Meter Clock

Analog panel meter clock using CircuitPython and the new FeatherS2 by Unexpected Maker. It syncs with WorldTimeAPI on boot and every 12 hours – Twitter.

STM32WB Feather board

The new Reclaimer Labs STM32WB Feather board with Bluetooth – Reclaimer Labs.

Introduction to CircuitPython language and the nRF52840 chip

A new book: Introduction to CircuitPython language and the nRF52840 chip, by Michaël Bottin (in French) – elektor via Twitter.

CircuitPython on an MS88SF2 nRF52840 module

Tweaking the bootloader from the PCA10056 to get CircuitPython running on the MS88SF2 module, which uses an nRF52840 – Twitter.

Holiday Signage

Holiday Signage with NeoPixels and an Adafruit Circuit Playground ExpressTwitter.

Using the Pimoroni Enviro+ FeatherWing With the Adafruit Feather NRF52840 Express

A short guide explaining how to use the Pimoroni Enviro+ FeatherWing with the Adafruit Feather NRF52840 Express. It includes a few tips on soldering, a summary of pins used, how to workaround issues in a library and some ideas for further work – Instructables.

Bite-size Python book

Bite-Size Python: An Introduction to Python Programming by April SpeightVoge and Code and Twitter.

Python Turtle for Beginners

Python Turtle for Beginners – Twitter and Real Python.

Holiday Chimes

A battery powered musical chime set, loosely inspired by the Ye Merry Minstrel Caroling Christmas Bells. Built with a black walnut stand using copper tubing, 3D-printed hangers and controlled by an ESP32 running MicroPython – GitHub.

MicroPython-micro-bit Talking ML

MicroPython micro:bit Talking ML – Twitter.

Block-based programming

Block-based programming: does it help students learn? – Raspberry Pi Blog.

Python vs C++

Python vs C++: Selecting the Right Tool for the Job – Real Python.

#ICYDNCI What was the most popular, most clicked link, in last week’s newsletter? CircuitPython Getting Started Guide for Sony Spresense.

PyDev of the week: Martijn Faassen on Mouse vs Python

CircuitPython Weekly Meeting for December 21, 2020 (notes) on YouTube

Coming soon

BluePhage Express

BluePhage Express, a Bluetooth keyboard controller for use with CircuitPython/KMK, QMK, and ZMK – Reddit.


New boards based on the ESP32-S2 running CircuitPython from arturo coming soon – Twitter

TinyPICO V2 Play Shield prototype

Stage working on the TinyPICO V2 Play Shield prototype using MicroPython – Twitter.

New Boards Supported by CircuitPython

The number of supported microcontrollers and Single Board Computers (SBC) grows every week. This section outlines which boards have been included in CircuitPython or added to CircuitPython.org.

This week, no new boards were added but several are being worked on.

Looking for adding a new board to CircuitPython? It’s highly encouraged! Adafruit has four guides to help you do so:

New Learn Guides!

New Learn Guides

Ten amazing new, open source guides featuring CircuitPython, in the Adafruit Learning System this week!

MagTag Daily Weather Forecast Display from Carter Nelson

MagTag Covid Tracking Project IoT Display from Ladyada

Adabox 017 from John Park

MagTag Lists From Google Spreadsheets from Phil Burgess

EMC2101 Fan Controller and Temperature sensor from Bryan Siepert

WiFi-Controlled NeoPixel Matrix LED Sign from Noe and Pedro

MagTag Cat Fed Clock from Collin Cunningham

Creating MagTag Projects with CircuitPython from Melissa LeBlanc-Williams

MagTag Weekly Showtimes Event Notifier from John Park

Google Graveyard with Adafruit MagTag from Dylan Herrada

Updated Learn Guides!

CircuitPython Essentials from Kattni

CircuitPython Libraries!

CircuitPython Libraries

CircuitPython support for hardware continues to grow. We are adding support for new sensors and breakouts all the time, as well as improving on the drivers we already have. As we add more libraries and update current ones, you can keep up with all the changes right here!

For the latest libraries, download the Adafruit CircuitPython Library Bundle. For the latest community contributed libraries, download the CircuitPython Community Bundle.

If you’d like to contribute, CircuitPython libraries are a great place to start. Have an idea for a new driver? File an issue on CircuitPython! Have you written a library you’d like to make available? Submit it to the CircuitPython Community Bundle. Interested in helping with current libraries? Check out the CircuitPython.org Contributing page. We’ve included open pull requests and issues from the libraries, and details about repo-level issues that need to be addressed. We have a guide on contributing to CircuitPython with Git and Github if you need help getting started. You can also find us in the #circuitpython channel on the Adafruit Discord.

You can check out this list of all the Adafruit CircuitPython libraries and drivers available.

The current number of CircuitPython libraries is 286!

Updated Libraries!

Here’s this week’s updated CircuitPython libraries:

What’s the team up to this week?

What is the team up to this week? Let’s check in!


This week, I’ve been working with the SCD30 from Sensirion: a NDIR (Non-Dispersive InfraRed) C02 sensor module with temperature and humidity measurements provided by an additional onboard sensor. As previously discussed, this NIDR sensor is basically an optics lab that you can carry in the palm of your hand! Some cursory search suggests that CO2 sensors tend to cost anywhere from around $100 to as much as $1000 or more. While the final price of the Adafruit SCD30 offering will depend on the costs associated with offering it for sale, It’s likely that it will cost significantly less than the $100 price point. As always, I’m excited to see what new and interesting uses the Adafruit community will find for the SCD30, especially given the role CO2 plays for living things.

CO2 level is often used as an indirect measure of air quality, since buildup of CO2 within an environment will happen when there is poor ventilation of a space, and the waste CO2 produced by humans collects instead of being removed. With poor ventilation, other airborne hazards will also build up to potentially dangerous levels. Mold, carbon monoxide, air pollution from cooking, and most importantly dog flatulence and cat litter box stink are generally not things that you want to be breathing in. Air quality and ventilation are especially relevant now given what is known about the COVID-19 transmission risks associated with indoor spaces.

As a personal project, I’m hoping to use the SCD30 to measure how the CO2 levels in my Dubia Roach enclosure change over time, with the intent to use it as a proxy for the metabolism of the colony as a whole. I’ve considered attaching small masks to the roaches to measure metabolism directly, however that approach seems challenging and given the availability of the SCD30, perhaps not necessary for now.


I finished implementing persistent memory that is maintained during CircuitPython deep sleep. This has been merged into the main branch. I’m finishing up a guide to sleep and alarms: it just needs a few demo videos. I will be reviewing and testing Scott’s support for pin alarms soon.

There were some BLE regressions in 6.x CircuitPython, so I’ll be debugging these over the next few days.

Jeff and I worked on getting the CircuitPython code base to compile with the latest ARM gcc toolchain, which is now based on gcc 10. There were some changes in what’s done for certain optimization levels, and we had to tune these settings to avoid overflowing flash on some builds. There is also improved error-checking in gcc 10: it detected some code bugs that we have fixed.


I had a couple of guides published in the Learn system last week. While there’s only a little Python in it, I’m most excited about the diy lofi hip hop raspberry pi radio with braincraft hat.


Another big development is the addition of support for “pcf” format fonts to adafruit_bitmap_font. These fonts load several times faster than “bdf” format fonts, and are also somewhat smaller on disk.



This week I added the QT Py to the CircuitPython Essentials guide. A lot of basic CircuitPython examples rely on the D13 LED, which isn’t present on the QT Py hardware. So for those examples, I included a wiring diagram showing how to wire up an LED to the QT Py, and updated the examples to include code for the external LED. Everything worked as expected except the Storage example, which fails to work on the latest CircuitPython, 6.1.0-beta.2. I filed a bug for that, but the issue may be a feature, and we may have to reconsider how we do that example for the future. We’ll find out!


This past week I’ve been working on the TCP Server API, implementing the Socket functions Bind(), Listen() and Accept() and corresponding test programs. These functions are used when creating a server on the ESP32-S2, which can accept connections from other devices and return data to them.


I’ve found a number of resources useful while working on the socket API, but none more useful than Beej’s Guide to Network Programming. To anyone looking to understand more about what’s going on with the ESP32-S2 network development, it’s an informative (and entertaining) place to start.

Outside of sockets, I’ve been continuing to prowl around other bugs on the ESP32-S2 core modules, including continuing issues with Analog and the NeoPixel. While we’ve gotten important fixes in, such as the memory leak in the AnalogIO code, we’re still seeing some issues reported, so I’ll be tackling those this week as well.


This week, I finished up the Web Serial ESPTool and wrote up a guide page for using it. Web Serial ESPTool is an online tool that uses Web Serial to directly communicate with the ESP chips without needing to install any additional software besides the chrome browser. You can find the guide page in our MagTag guide or Metro ESP32-S2 guide.

After that was finished, I wrote up a guide on creating new projects for the MagTag. The guide goes through the different layers and a couple of code examples including one that uses deep sleep. You can find the guide here.


This week, I’ve been wrapping up pin level alarms. It’s mostly working but there are some weird bugs. I made a PR to get other eyes on it. After this I’m taking a break from the S2 features, may tackle some bugs or experiment with new things of interest. It should be a fun next few weeks amongst the holidays. I hope everyone has a good holiday season.

On January 1st, we’ll launch #circuitpython2021 where we hope to hear from all of our community members about what you’d like to see CircuitPython do. We’ll all post as well. So, start brainstorming what 2021 can bring to making things with CircuitPython.

Upcoming events!

Python Pizza New Year's

Python Pizza New Year’s Party, Remote @ home. Countdown edition on 31 December 10:00 (your time) – Python Pizza is a micro conference organized by the Python Hamburg Community. Submit your 10-min talk idea, it can be about anything UNBORING you want to share this New Year’s Eve with the community! Call For Proposals must be in by 25 December – Python Pizza.

linux.conf.au 2021

Australia’s grassroots Free and Open Source technologies conference linux.conf.au is scheduled for January 23-25 2021 online/worldwide. Limor “Ladyada” Fried, electrical engineer and founder of Adafruit, will be one of their keynote speakers. In her keynote, Limor will discuss how Python is snaking its way into hardware, Linux single board computers and more.

The schedule and tickets are available at lca2021.linux.org.auAnnouncement.

FOSDEM 2021 Python Developer Room

FOSDEM is a free and non-commercial event organised by the community for the community. Typically hosted in Brussels, Belgium, FOSDEM 2021 is taking place online February 6-7, 2021. This year, there will be a Python Developer Room. Details – Adafruit Blog.

PyCascades 2021

PyCascades is a regional PyCon in the Pacific Northwest, celebrating the west coast Python developer and user community. Held online February 19th — 21st, 2021 – PyCascades.

2021 Open Hardware Summit

The 2021 Open Hardware summit will be held online, Friday April 9, 2021. The summit will be livestreamed, but ticket holders will have access to additional interactive portions of the summit like meet-and-greets, workshops, and sponsor booths. Find details, including ticket and sponsorship information at 2021.oshwa.orgOSHWA.

PyCon US 2021

PyCon US, the annual official annual Python gathering, has been announced to be held online May 12-15, 2021. Sprints will be held May 16-18, 2021. More information and signups at https://us.pycon.org/2021/

Send Your Events In

As for other events, with the COVID pandemic, most in-person events are postponed or cancelled. If you know of virtual events or events that may occur in the future, please let us know on Discord or on Twitter with hashtag #CircuitPython.

Latest releases

CircuitPython’s stable release is 6.0.0 and its unstable release is 6.1.0-beta.2. New to CircuitPython? Start with our Welcome to CircuitPython Guide.

20201221 is the latest CircuitPython library bundle.

v1.13 is the latest MicroPython release. Documentation for it is here.

3.9.0 is the latest Python release. The latest pre-release version is 3.10.a3.

1942 Stars Like CircuitPython? Star it on GitHub!

Call for help – Translating CircuitPython is now easier than ever!

CircuitPython translation statistics on weblate

One important feature of CircuitPython is translated control and error messages.

With the help of fellow open source project Weblate, we’re making it even easier to add or improve translations.

Sign in with an existing account such as Github, Google or Facebook and start contributing through a simple web interface. No forks or pull requests needed!

As always, if you run into trouble join us on Discord, we’re here to help.

jobs.adafruit.com – Find a dream job, find great candidates!


jobs.adafruit.com has returned and folks are posting their skills (including CircuitPython) and companies are looking for talented makers to join their companies – from Digi-Key, to Hackaday, Microcenter, Raspberry Pi and more.

Job of the Week

Director of Resource Development – Python Software Foundation

The PSF is seeking to hire a Director of Resource Development to spearhead fundraising and sponsorship efforts! They are accepting resumes through January 14th, 2021 – Adafruit Jobs Board.

26,263 thanks!

26263 THANKS

Adafruit Discord

The Adafruit Discord community, where we do all our CircuitPython development in the open, reached over 26,263 humans, thank you! Adafruit believes Discord offers a unique way for CircuitPython folks to connect. Join today at https://adafru.it/discord.

ICYMI – In case you missed it


The wonderful world of Python on hardware! This is our Python video-newsletter-podcast! The news comes from the Python community, Discord, Adafruit communities and more and is reviewed on ASK an ENGINEER Wednesdays. The complete Python on Hardware weekly videocast playlist is here.

This video podcast is on iTunes, YouTube, IGTV (Instagram TV), and XML.

Weekly community chat on Adafruit Discord server CircuitPython channel – Audio / Podcast edition – Audio from the Discord chat space for CircuitPython, meetings are usually Mondays at 2pm ET, this is the audio version on iTunes, Pocket Casts, Spotify, and XML feed.

And lastly, we are working up a one-spot destination for all things podcast-able here – podcasts.adafruit.com

Codecademy “Learn Hardware Programming with CircuitPython”

Codecademy CircuitPython

Codecademy, an online interactive learning platform used by more than 45 million people, has teamed up with the leading manufacturer in STEAM electronics, Adafruit Industries, to create a coding course, “Learn Hardware Programming with CircuitPython”. The course is now available in the Codecademy catalog.

Python is a highly versatile, easy to learn programming language that a wide range of people, from visual effects artists in Hollywood to mission control at NASA, use to quickly solve problems. But you don’t need to be a rocket scientist to accomplish amazing things with it. This new course introduces programmers to Python by way of a microcontroller — CircuitPython — which is a Python-based programming language optimized for use on hardware.

CircuitPython’s hardware-ready design makes it easier than ever to program a variety of single-board computers, and this course gets you from no experience to working prototype faster than ever before. Codecademy’s interactive learning environment, combined with Adafruit’s highly rated Circuit Playground Express, present aspiring hardware hackers with a never-before-seen opportunity to learn hardware programming seamlessly online.

Whether for those who are new to programming, or for those who want to expand their skill set to include physical computing, this course will have students getting familiar with Python and creating incredible projects along the way. By the end, students will have built their own bike lights, drum machine, and even a moisture detector that can tell when it’s time to water a plant.

Visit Codecademy to access the Learn Hardware Programming with CircuitPython course and Adafruit to purchase a Circuit Playground Express.

Codecademy has helped more than 45 million people around the world upgrade their careers with technology skills. The company’s online interactive learning platform is widely recognized for providing an accessible, flexible, and engaging experience for beginners and experienced programmers alike. Codecademy has raised a total of $43 million from investors including Union Square Ventures, Kleiner Perkins, Index Ventures, Thrive Capital, Naspers, Yuri Milner and Richard Branson, most recently raising its $30 million Series C in July 2016.


The CircuitPython Weekly Newsletter is a CircuitPython community-run newsletter emailed every Tuesday. The complete archives are here. It highlights the latest CircuitPython related news from around the web including Python and MicroPython developments. To contribute, edit next week’s draft on GitHub and submit a pull request with the changes. You may also tag your information on Twitter with #CircuitPython.

Join our Discord or post to the forum for any further questions.

Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards

Join Adafruit on Mastodon

Adafruit is on Mastodon, join in! adafruit.com/mastodon

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Join over 36,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org

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Python for Microcontrollers — Python on Microcontrollers Newsletter: Silicon Labs introduces CircuitPython support, and more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi

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EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — #NewProds 7/19/23 Feat. Adafruit Matrix Portal S3 CircuitPython Powered Internet Display!

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