Piunora

by Diodes Delight

Image of Board

Piunora is a compact, easy-to-use development board for electronics prototyping with Linux. It has a familiar form factor, legible pin labels, and a design that’s well suited to space-constrained applications.

As a carrier board for the Raspberry Pi Compute Module 4 (CM4), Piunora is essentially a tiny version of the Raspberry Pi 4 Single Board Computer (SBC) with added flexibility to accommodate custom form factors. CM4-based devices like Piunora are fully compatible with software that was written for the Raspberry Pi 4, as long as that software accounts for the hardware peripherals in use. There are also versions of the CM4 that include eMMC memory, which is more reliable than a traditional SD card.

It may be small, but Piunora is packed with powerful peripherals that will come in handy for rapid prototyping and embedded machine-learning applications. Examples include an HDMI port, camera-input connectors, and PCI-e support, which is not present on a standard Raspberry Pi 4. Finally, the M.2 B-Key port on the rear of the board is not only useful for SSD storage, it can also host a diverse range of PCI-e expansion boards.

Technical details

  • Arduino UNO R3 / Adafruit Metro compatible form factor (3.3 V logic, may not be compatible with all Shields)
  • PCI-e through M.2 B-Key connector on the rear of the board with dedicated 3.3 V/3 A supply
  • Analog to Digital Converter (MCP3008)
  • On-the-fly switching between USB host (USB Type-A) and device mode (USB-C)
  • Qwiic/Stemma QT connector to easily interface with I2C devices
  • A full-sized camera connector that supports all Pi-compatible cameras
  • A full-sized HDMI 2.0 port
  • A WS2812 Smart RGB LED for user status
  • Optional Wi-Fi or eMMC options depending on your choice of CM4
  • Slim design with the Piunora Lite measuring 8-12 mm and the Piunora Pro measuring 11-13 mm
  • Two user-controllable buttons (including software that turns one of them into a safe-shutdown button)

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CircuitPython 7.3.3

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

Start here if you are new to CircuitPython.

Release Notes for 7.3.3

Built-in modules available: _bleio, adafruit_bus_device, adafruit_pixelbuf, aesio, atexit, binascii, bitbangio, bitmaptools, board, busio, digitalio, displayio, errno, fontio, framebufferio, getpass, gifio, json, keypad, math, microcontroller, msgpack, neopixel_write, onewireio, os, rainbowio, random, re, sdcardio, sdioio, sharpdisplay, storage, struct, supervisor, terminalio, time, touchio, traceback, ulab, usb_cdc, usb_hid, usb_midi, vectorio, zlib

CircuitPython 8.0.0-beta.1

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

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

Release Notes for 8.0.0-beta.1

Built-in modules available: _bleio, adafruit_bus_device, adafruit_pixelbuf, aesio, atexit, binascii, bitbangio, bitmaptools, board, busio, digitalio, displayio, dotenv, errno, fontio, framebufferio, getpass, json, keypad, math, microcontroller, msgpack, neopixel_write, onewireio, os, rainbowio, random, re, sdcardio, sdioio, sharpdisplay, storage, struct, supervisor, terminalio, time, touchio, traceback, ulab, usb_cdc, usb_hid, usb_midi, vectorio, zlib

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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