I’ve created a custom integration to track the status and health of AREDN nodes. It includes a binary sensor to indicate whether the desired node is currently reachable, and pulls in statistics and details for the other mesh nodes it’s connected to (via RF, DtD, Wireguard), CPU and memory usage, mesh RF status, a device tracker (if coordinates are set), and optional SNR details for RF-connected nodes.
The configuration step will attempt to auto-discover your immediately-connected node and its neighbors, but you can enter any arbitrary hostname/IP address, as long as it supports the v2 sysinfo API (firmware version >= 4.26.1.0 or babel-only nightly builds).