Koios 1.2

Serial and GPIO device access: attach host hardware to Koios

Under active development

Koios 1.2 has not been released yet. This page previews changes that have already landed and will grow as the release comes together, so details may still change before general availability.

Serial and GPIO device access

Upcoming

Koios can now reach serial, GPIO, I2C, and SPI hardware attached to the host without a world-writable device node or a privileged container.

Expose a device node with --device, and Koios grants its services access through the node's owning group. Standard serial devices (the dialout group) work with no configuration. For other peripherals, the new KOIOS_EXTRA_GROUPS variable takes a comma-separated list of group names and/or numeric group IDs. Numeric IDs are the reliable choice, because a device's group ID varies between hosts. Root (group ID 0) is refused, and unresolvable entries are skipped rather than blocking startup.

See Environment Variables for KOIOS_EXTRA_GROUPS and the setup steps.

Migrating to v1.0.0 Version 1.1