Open-source software

Power Manifold’s firmware is published under the MIT License, with its source code on GitHub. The hardware designs are published under CERN-OHL-P-2.0 and this documentation under CC BY 4.0.

The firmware also contains software written by others. Each piece comes under its own license, and most of those licenses ask for their copyright notices and license text to go with every copy.

Controller firmware

Software	What it does	License
Pico SDK, from Raspberry Pi	Runs the processor	BSD-3-Clause
printf by Marco Paland and USB descriptors from MicroPython, both part of the Pico SDK	Text formatting, USB device description	MIT
SEGGER RTT, part of the Pico SDK	Diagnostic output	SEGGER’s BSD-style license
lwIP	Networking: TCP/IP, DHCP, DNS, mDNS, MQTT, time, firmware downloads	BSD-3-Clause
Mbed TLS	Encryption for HTTPS and for MQTT over TLS	Apache-2.0
cyw43-driver	The Wi-Fi radio	Raspberry Pi’s license for its own chips
BTstack, from BlueKitchen, with Rijndael (AES) by Philip J. Erdelsky	The radio link a phone uses for Wi-Fi setup	Raspberry Pi’s license for BTstack on its products; public domain
TinyUSB	USB device support	MIT
Monocypher	Checks the signature on firmware updates	BSD-2-Clause
newlib	The C library	newlib’s licenses

The controller carries the charger module firmware to keep blades up to date, so it also contains everything in the next table.

Charger module firmware

Software	What it does	License
CMSIS, from Arm, and the STM32G0 device files, from ST	Starts the processor	Apache-2.0
STM32G0 low-layer drivers, from ST	The USB-C® and DMA hardware	BSD-3-Clause
USB Power Delivery stack, from ST	Negotiates power with the connected device	SLA0044
newlib and libgloss	The C library	newlib’s and libgloss’s licenses

ST’s USB Power Delivery stack is not open-source software. ST’s license for it, SLA0044, permits its use on ST microcontrollers only, and the charger module firmware contains it in binary form.

Full notices

Every firmware release on GitHub includes a notices file with each copyright notice and the full license texts, made from the files that went into that build:

• controller-notices.txt with each controller firmware release, covering the charger module firmware it carries as well
• charger-module-notices.txt with each charger module firmware release

The software bill of materials attached to the same release (controller.cdx.json or charger-module.cdx.json) gives the version of each component.