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CircuitPython Weekly for 9 September 2019

Welcome to the CircuitPython Weekly meeting notes! Feel free to add your notes for Hug Reports and Status Updates early. During the meeting, we go through them as a round robin sorted by username. If you can’t make the meeting and would still like to participate, add your notes with a “(missing meeting)” after your username and we’ll read them off for you.

Add any longer-form discussion topics or general questions you have to the “In the weeds” section.

Thanks! We hope to see you in the meeting!

Video is available here on YouTube.

Join here for the chat all week: http://adafru.it/discord

The weekly happens normally at 2pm ET/11am PT on Mondays. Check the #circuitpython channel on Discord for notices of change in time and links to past meetings.

CircuitPython development is sponsored by Adafruit. Please support them by purchasing hardware from https://adafruit.com.

Reminders: Podcast available on most services. Let us know if we’re missing some.

4:34 Community News

The Top Programming Languages 2019 - Python tops the charts with a CircuitPython nod! https://spectrum.ieee.org/computing/software/the-top-programming-languages-2019

CircuitPython 5.0.0 Alpha 2 Released! https://blog.adafruit.com/2019/09/04/circuitpython-5-0-0-alpha-2-released/

Machine Learning with Microcontrollers Hack Chat, lots of Python on Pi! 3pm ET Weds! https://hackaday.com/2019/09/09/machine-learning-with-microcontrollers-hack-chat/

Speaking of' Hackaday turned 15, tune in to the story and more https://youtu.be/kMkgwSLj0Uc

Feather STM32F405 – How did we do? https://blog.adafruit.com/2019/09/04/feather-stm32f405-how-did-we-do-st_world-stm32f405-stm32-stm-adafruit/

wiringPi, wiringPi GPIO library – deprecated… Lessons for the open-source community https://blog.adafruit.com/2019/09/02/wiringpi-wiringpi-gpio-library-deprecated-lessons-for-the-open-source-community-drogon/

8:21 State of CircuitPython + Libraries

8:44 Overall

  • 38 pull requests merged
    • 13 authors - makermelissa, hierophect, sommersoft, dhalbert, jepler, deshipu, jerryneedell, caternuson, hartzell, brentru, ntoll, tannewt, dastels
    • 10 reviewers - hierophect, sommersoft, dhalbert, kattni, siddacious, ladyada, caternuson, brentru, makermelissa, tannewt
  • 17 closed issues by 7 people, 17 opened by 7 people

10:15 Core

Download stats by board:

Board 4.1.0 5.0.0-alpha.2
arduino_mkr1300 43 0
arduino_mkrzero 23 0
arduino_zero 46 1
bast_pro_mini_m0 2 0
capablerobot_usbhub 0 0
catwan_usbstick 1 0
circuitplayground_bluefruit - 13
circuitplayground_express 1404 11
circuitplayground_express_4h 8 0
circuitplayground_express_crickit 82 0
circuitplayground_express_digikey_pycon2019 6 0
cp32-m4 - 0
datalore_ip_m4 - 0
datum_distance 0 0
datum_imu 1 0
datum_light 1 0
datum_weather 1 0
electronut_labs_blip 2 1
electronut_labs_papyr 0 0
escornabot_makech 1 0
feather_m0_adalogger 78 0
feather_m0_basic 65 0
feather_m0_express 256 3
feather_m0_express_crickit 13 0
feather_m0_rfm69 37 0
feather_m0_rfm9x 76 1
feather_m0_supersized - 0
feather_m4_express 389 3
feather_nrf52840_express 76 4
feather_radiofruit_zigbee 2 0
gemma_m0 205 0
gemma_m0_pycon2018 3 0
grandcentral_m4_express 91 1
hallowing_m0_express 82 3
hallowing_m4_express - 2
itsybitsy_m0_express 134 0
itsybitsy_m4_express 228 3
kicksat-sprite 1 0
makerdiary_nrf52840_mdk 11 2
makerdiary_nrf52840_mdk_usb_dongle 21 1
meowmeow 2 0
metro_m0_express 282 9
metro_m4_airlift_lite 55 0
metro_m4_express 142 2
metro_nrf52840_express - 0
mini_sam_m4 7 0
monster_m4sk - 1
particle_argon 6 1
particle_boron 3 0
particle_xenon 18 1
pca10056 22 5
pca10059 54 4
pewpew10 11 0
pewpew13 0 0
pirkey_m0 1 0
pybadge 127 0
pybadge_airlift 2 3
pygamer 254 3
pygamer_advance 17 0
pyportal 377 6
pyportal_titano - 0
pyruler 98 1
robohatmm1 3 -
robohatmm1_m0 - 0
robohatmm1_m4 - 0
sam32 11 0
snekboard - 0
sparkfun_lumidrive 2 0
sparkfun_nrf52840_mini 13 1
sparkfun_redboard_turbo 8 0
sparkfun_samd21_dev 5 0
sparkfun_samd21_mini 6 0
trellis_m4_express 126 3
trinket_m0 679 1
trinket_m0_haxpress - 0
uchip 4 0
ugame10 17 1
---------------------------------------------- -------- ----------------
Total 5741 91
---------------------------------------------- -------- ----------------

Download stats by language:

Board 4.1.0 5.0.0-alpha.2
ID 4 0
de_DE 136 0
en_US 5291 85
en_x_pirate 44 2
es 90 1
fil 8 1
fr 99 1
it_IT 17 0
pl 26 1
pt_BR 17 0
zh_Latn_pinyin 9 0
----------------- -------- ----------------
Total 5741 91
----------------- -------- ----------------

12:30 Libraries

14:30 Hug reports

19:43 @brentru

  • @jerryn for making CircuitPython_Requests compatible with Raspberry Pi and Particle boards.
  • Group hug

@cater (lurking) 20:05 @CGrover (lurking)

  • Group hug

20:20 @charlesburnaford

  • Group hug

21:03 @danh

  • @tannewt for alpha.2
  • @tannewt for polishing off displayio
  • @jepler for hard work on audio
  • @kattni for finding pin assignment bug in CPB

22:05 @Dave Briccetti

  • @siddacious for help with the CircuitPython Community Members directory

@DaveP (Lurking)

22:20 @deshipu

  • group hug
  • @danh for the USB endpoint configuration

22:43 @hierophect

  • @danh for HID updates
  • @thach for F412 update
  • @ladyada for F412 testing help
  • @tannewt for taking a look at PRs

23:34 @jasonp

  • Group hug
  • @anecdata for help with my CP 5 cutover last Friday
  • Adafruit, overall, for continuing to create inspiring products and community

24:13 @jepler

  • Group hug

24:31 @jerryn

  • Group hug

15:15 @kattni

  • @danh and @jepler for help with understanding and explaining capacitive touch on the nRF52840
  • @danh for fixing up the board def on the Circuit Playground Bluefruit
  • Justin for getting circuitpython.org ready for the /contributing updates
  • @sommersoft for work on the circuitpython.org/libraries/contributing updates

@KingerNorth (Lurking)

16:39 @MakerMelissa

  • @kattni for helping me out with some Macbook questions
  • @anecdata for doing some additional eInk testing
  • @hansoosterdorp for submitting a great Orange Pi Zero PR
  • Group Hug

17:05 @ntoll (missing meeting)

  • My Hug report is for @danh for his really helpful ideas last week while I was working on circup
  • A general TellyTubby like group hug!

17:21 @siddacious

  • @Dave Briccetti for putting together the CircuitPython community members spreadsheet
  • Pt, Limor and the Hackaday folks for a great overview of the past and future of Hackaday
  • @sajattack for becoming a Community Helper

17:53 @tannewt

  • MatthewNewberg for adding dithering to ColorConverter
  • Eric Traut for pyright and dan
  • @ladyada for lotsa reviews
  • @danh, @kattni, @jepler for hunting down incorrect CPB pin mapping

24:43 Status Updates

37:47 @brentru

  • LW:
    • Started class(es), looking fwd to the semester ahead :)
    • Worked on AirLift Bitsy guide, assembled a new circuitpython proto, iot newsletter
    • Building out Adafruit_ATECC module for the ATECC608A breakout we sell (and on most AirLift-compatibles). This is a hardware-accelerated cryptographic authentication module.
      • Working: sha-256 hashing, random value generation, nonce generation, monotonic counters, ECC key generation, chip configuration + locking
  • TW:
    • Continued work on Adafruit_ATECC, working towards more advanced modules/demos which “show off” the module and make it useful for #PythonHardware IoT Applications:
      • Started work on generating a Certificate Signing Request (CSR) for use with AWS -> Build out AWS MiniMQTT Wrapper Lib.
        • Then, JWS generation - update for CircuitPython Google Cloud IoT
          • Self-Signed cert. -> update CircuitPython Azure IoT
            • CircuitPython Azure IoT also needs update to use MiniMQTT, currently is REST-API only.
    • Future module work (TODO) would be for TinyLora with ATECC, would significantly speed up authentication (bring circuitpython devices online faster)

@cater (lurking)

@CGrover (lurking)

39:29 @charlesburnaford (lurking/already reported)

  • finally got keyboard project working, got the info from the documentation

39:40 @danh

  • Working on BLE bonding: choosing persistent storage mechanism. MicroPython PR for LittleFS (used in Arduino Bluefruit library) is available though not yet merged. Added it manually. It will be another mountable volume so users can examine and manipulate it via REPL and Python.
  • Fixing bugs in compile-time USB and HID configuration. Debugging gamepads on Windows.
  • Fixed pin assignment bug in CPB.
  • Sketching out simple library for CPB.
  • Discussing BLE APIs with MicroPython BLE implementers.

42:25 @Dave Briccetti

  • Here is the CircuitPython Community Members directory. Feel free to improve it, or make comments. Once the info we want to collect is somewhat stabilized, we can create a form, to make input easier.
  • I made a fun pair of programs that transmit messages over the CPX NeoPixels. The decoder program uses Python, OpenCV and numpy to see and decode the data. The encoder might make an interesting CircuitPython library example.

@DaveP (lurking)

44:19 @deshipu

  • more of the same

44:26 @Hierophect

  • Wrapped up flash PR
  • Github CI Support
  • Revamped stm32 pin system
  • Added F412 USB support
  • Should get Analogio in by today
  • Next up is busio/peripherals object, then QSPI flash and F405 support.
  • … Fix F412 support :(

45:35 @jasonp

  • No active project right now
  • Looking for ideas…
  • DMX lighting control on the table
  • CP on FPGA is a topic of specific interest to me

46:38 @jepler Last week:

  • Got nRF I2SOut to pull request status. Playing 16-bit mono samples works great. There were some glitches, but maybe just my mistakes or due to using debugging builds
  • That PR includes a fix for a bug I ran into with truncated WaveFiles that locks up circuitpython with nRF I2SOut (probably “harmless-ish” with other AudioOut devices)
  • A couple other minor PRs filed This week:
  • Further testing of nRF I2SOut. Some things that come to mind:
    • 8 bit WaveFile and RawSample
    • stereo
    • The new mixer (!!) Future:
  • Return to samd51 AnalogOut/AudioOut issues
    • Finish comparing relevant register states to Arduino
    • Ensure all Issues are updated with my findings
    • If further fixes not found, get an existing branch to non-draft PR status
  • Take some lessons learned while working on nRF I2SOut and apply to nRF PWMAudioOut
    • Improved memory usage
    • Potentially solves non-looping RawSample issue

49:14 @jerryn

  • Spent most of last week in a canoe - off the grid - it was lovely!
  • Just for fun - hooked up an Airlift breakout to a Raspberry Pi Zero
    • With a minor tweak to Adafruit_Circuitpython_Requests, it works fine
    • Not sure how useful -- a WiFi Dongle is much less expensive and easier to use.
  • Started testing CircuitPlayground Bluefruit with Crickit. So far so good.
  • Hope to get back to some LoRa/LoRaWAN projects.
    • Want to look into issue with “garbage” transmissions with rfm9x

25:51 @kattni

  • Last week:
    • Updated the CircuitPython FAQ and Troubleshooting page with links to the final 3.x and 2.x bundles
    • Merged PR to deprecate old bundles, introduce 5.x bundle
    • Blogged ATECC608 guide release
    • Started on Circuit Playground Bluefruit guide
      • Pinouts, Guided Tour, Downloads pages are done
      • CP install page, and mirrored pages done
      • Started testing on CircuitPython Playground
      • Analog In done, Digital In/Out done
  • This week:
    • Library Monday!
      • Verify all libs are in bundle
      • Release circuitpython-build-tools
    • Continue CPB testing, currently doing cap touch
    • Test circup
    • Continue looking into updating circuitpython.org/libraries/contributing
    • Verify 5.x bunde, update cp.org/libraries
    • Update various libraries created before current cookiecutter

@KingerNorth (lurking)

30:36 @MakerMelissa

  • Last Week
    • Finished reviewing eInk PRs
    • Finished Raspberry Pi TensorFlow Lite guide
    • Verified an issue with labels and the monochrome eInk FeatherWing
    • Fixed a couple libraries with missing versions and repo URLs
    • Added HallowWing M4 to Arduino ST7789 Library Examples
    • Tested out PR for adding Blinka to Orange Pi Zero and got that merged in
    • Started guide for running Blinka on Nvidia Jetson Nano
      • Ran into some issues with enabling SPI being very complicated and not user-friendly
  • This Week:
    • Finish guide for Jetson Nano
    • Test a PR for the SSD1306 in Arduino
    • Revisit some previous Blinka guides with with a better understanding of some issues I couldn’t work out before plus some more testing

33:26 @siddacious

  • Finished the PCT2075 temp sensor drivers
  • Got the TLV493D guide ready but for pictures
  • Successfully tested the latest Rev. of the new OLED bonnet
  • Airlift BitsyWing/Add-On Released
  • This week: Working on the PCT2075 guide
  • SSD1305 displayio driver and framebuffer driver works to interface with the OLED bonnet
  • Likely bringing up a new board, starting drivers, etc.
  • Made a CP powered Trinket M0 ring light for my phone so the lighting of my pics doesn't’ suck so much anymore
  • Attended the Embedded.fm podcast’s 300th episode “Cats & Hacks” party, met lots of cool people, including Alvaro of the Unnamed Reverse Engineering Podcast who encouraged me to ...
  • Started hacking on my Droid Depot Droid. Pix here:

35:17 @tannewt

  • Last week
    • Started getting iOS dev setup
    • Polished up ePaper drivers and got them into the bundle. Added a number of missing drivers to the driver page.
    • Added .hidden to TileGrid and Group
    • Fixed I2CDisplay and released Alpha.2
    • Explored rst2pyi and pyright for mobile python structured editing
  • This week
    • PRs and testing
    • Prototyping file service over BLE

51:15 In The Weeds

51:54 Shall we talk FPGAs? -- @jepler

  • @tannewt - suggesting USB support focus
  • @jasonp - agrees with creating the CP experience, thinks we’re not so far off from making that happen

Greg? already has bin/gateware loading working using CircuitPython but the gateware is currently still generated by proprietary tools

  • @heirophect - good beginner project for FPGAs?
  • @tannewt: an alternate approach to the “fancy SOC” approach would be a über-seesaw approach that provides configurable io capabilities over i2c

1:10:15 Wrap-Up