Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

device identity

What a device is (its ID and the secret that proves it), as opposed to where it currently is on the network.

A device identity is a stable identifier bound to a credential -- a key pair and certificate or a per-device secret -- that the service authenticates; it is independent of the device's IP address, which can change.

Examples

  • The ID gh-a1b2c3d4e5f6, built from the chip's MAC, is the node's client ID and topic level; its password or certificate proves the ID is its own.

  • If the node moves from 192.168.1.37 to .52, its identity is unchanged; only its address moved.

See also

client ID IP address secure element eFuse
Read the full section →