67 lines
2.2 KiB
Markdown
67 lines
2.2 KiB
Markdown
# Officially supported microcontrollers
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While most CircuitPython devices are great for hand wired keyboards, most
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keyboards are designed to accept a Pro Micro. The boards listed below either
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are, or can be adapted to that pinout to use common keyboards already on the market.
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## nice!nano
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Features include
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- Pro Micro pinout
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- Both USB HID and Bluetooth support
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- Can do Bluetooth split keyboards with no wires at all
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- Has battery support including charging
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Downsides
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- $25 USD per microcontroller at most retailers
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### Pre-compiling KMK for nice!nano
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nice!nano has limited flash memory which does not fit CircuitPython, adafruit-ble, and KMK by default. You will need to use pre-compiled KMK to get it to fit. Grab [compatible mpy-cross](https://adafruit-circuit-python.s3.amazonaws.com/index.html?prefix=bin/mpy-cross/) and run `make compile` to generate `.mpy` version of KMK files before copying them over.
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Common Retailers
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- [Boardsource](https://boardsource.xyz/store/5f4a1733bbaa5c635b83ed67)
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- [Nice Keyboards](https://nicekeyboards.com/nice-nano/)
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## ItsyBitsy M4 Express
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Features include
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- Affordable at $15 USD
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- Can run most features of KMK including RGB
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Downsides
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- Needs adapted to work with Pro Micro pinout keyboards. Adapter can be found
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[HERE](https://github.com/KMKfw/kmk_firmware/tree/master/hardware)
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Common Retailers
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- [Adafruit](https://www.adafruit.com/product/3800)
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## RP2040
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Features include
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- Very affordable
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- Very powerful for the price
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Downsides
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- Little support for keyboard kits
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Common Retailers
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- [Adafruit](https://www.adafruit.com/pico?src=raspberrypi)
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- [SparkFun](https://www.sparkfun.com/products/17829?src=raspberrypi)
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## Adafruit ItsyBitsy nRF52840 Express
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Features include
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- Both USB HID and Bluetooth support
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- More affordable than the nice!nano at only $18
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Downsides
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- Needs adapted to work with Pro Micro pinout keyboards. Adapter can be found
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[HERE](https://github.com/KMKfw/kmk_firmware/tree/master/hardware)
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- No battery support without addon board found
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[HERE](https://www.adafruit.com/product/2124)
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Common Retailers
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- [Adafruit](https://www.adafruit.com/product/4481)
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## Other microcontrollers
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What you'll need to have at minimum
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- CircuitPython
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- 256KB of flash storage
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- HID over USB and/or Bluetooth.
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