BlueMicro833

by JPConstantineau

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The BlueMicro833 is a nRF52833 controller with the footprint of an Arduino Pro Micro and a USB-C connector. It uses the EByte E73-2GM08S1E nRF52833 module, has a Neopixel and software controller 3.3 V regulator that can turn on/off power to external devices. It’s based on the BlueMicro840 design but uses the internal voltage regulator to run. Just like other Bluemicros, there is a LiPo battery charger on board.

Many DIY keyboards use the Arduino Pro Micro or the Arduino Micro as their microcontroller. These don’t support BLE communications natively. Because the nRF52 chips have a 32-bit ARM Cortex-M4F processor, they have plenty of processing power compared to the traditional AVR chips. The BlueMicro boards were inspired from the Adafruit nrf52 feathers but made to be used directly in DIY keyboards as a replacement for the atmega32u4 based controllers.

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CircuitPython 7.3.1

This is the latest stable release of CircuitPython that will work with the BlueMicro833.

Start here if you are new to CircuitPython.

Release Notes for 7.3.1

Built-in modules available: _bleio, adafruit_pixelbuf, analogio, atexit, audiocore, audiopwmio, board, busio, digitalio, errno, getpass, keypad, math, microcontroller, neopixel_write, os, pulseio, pwmio, rainbowio, random, rotaryio, rtc, storage, struct, supervisor, time, usb_cdc, usb_hid, watchdog

CircuitPython 8.0.0-alpha.1

This is the latest unstable release of CircuitPython that will work with the BlueMicro833.

Unstable builds have the latest features but are more likely to have critical bugs.

Release Notes for 8.0.0-alpha.1

Built-in modules available: _bleio, adafruit_pixelbuf, analogio, atexit, audiocore, audiopwmio, board, busio, digitalio, dotenv, errno, getpass, keypad, math, microcontroller, neopixel_write, os, pulseio, pwmio, rainbowio, random, rotaryio, rtc, storage, struct, supervisor, time, usb_cdc, usb_hid, watchdog

Absolute Newest

Every time we commit new code to CircuitPython we automatically build binaries for each board and language. The binaries are stored on Amazon S3, organized by board, and then by language. Try them if you want the absolute latest and are feeling daring or want to see if a problem has been fixed.

Past Releases

All previous releases are listed on GitHub, with release notes, and are available for download from Amazon S3. They are handy for testing, but otherwise we recommend using the latest stable release. Some older GitHub release pages include the same binaries for downloading. But we have discontinued including binaries as assets on newer release pages because of the large number of files for each release.

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Update UF2 Bootloader

Latest version: 0.6.4

The bootloader allows you to load CircuitPython, MakeCode, and Arduino programs. The bootloader is not CircuitPython. You can check the current version of your bootloader by looking in the INFO_UF2.TXT file when the BOOT drive is visible (FEATHERBOOT, CPLAYBOOT, etc.).

It is not necessary to update your bootloader if it is working fine. Read the release notes on GitHub to see what has been changed. In general, we recommend you not update the bootloader unless you know there is a problem with it or a support person has asked you to try updating it.

Updating the bootloader on nRF52840 boards is an involved process right now. Follow the instructions in this README.

After you update, check INFO_UF2.TXT to verify that the bootloader version has been updated. Then you will need to reload CircuitPython.