scan_visa_resources()#

scan_visa_resources( backend: str | None = None, timeout: int = 2, *, rm: ResourceManager | None = None, ) → VisaScanResult[source]#

Scan VISA resources, query each for identity, and return matched instruments.

Pass an already-open rm (e.g. one a caller opened for its own backend diagnostics) to reuse it instead of opening a second one. backend is always the backend the caller asked for: None for the default with @py fallback, or an explicit specifier.

Each result records that requested backend, not the one it resolved to, so a None stays None and the VisaConfig and config block built from the result keep the default-then-fallback behavior instead of pinning whichever backend this machine happened to use.