Books by Marilyn Wolf

Extremetech reports hereon charger hacks.

Apache NuttX: https://nuttx.apache.org/

Zephyr: https://www.zephyrproject.org/

Extremetech reports here on right-to-repair and medical equipment.

UAVCAN is a bus protocol that can be implemented on any of several different physical layers.  Yukon is an associated project.

CNBC reports here on the initiation of Loon’s program to deploy Internet service in Africa using balloons.