VisaConfig#

class VisaConfig(
visa_resource: str,
visa_backend: str | None = None,
serial_config: SerialConfig = <factory>,
terminator: TerminatorConfig = <factory>,
timeout: TimeoutConfig = <factory>,
tcp_nodelay: bool = True,
)[source]#

Bases: object

Connection parameters for a VISA resource.

Variables:

  • visa_resource (str) – VISA resource string, e.g. TCPIP0::host::5025::SOCKET or USB0::0x2A8D::0x0101::MY12345::INSTR.

  • visa_backend (str | None) – pyvisa backend specifier. When unset (None), uses the system IVI VISA implementation (@ivi) and falls back to @py when no IVI backend is installed. An explicitly set backend is used as-is, with no fallback.

  • serial_config (SerialConfig) – Serial settings applied when the VISA resource is an ASRL (RS-232/RS-485) interface.

  • terminator (TerminatorConfig) – Read and write terminators.

  • timeout (TimeoutConfig) – Operation timeouts.

  • tcp_nodelay (bool) – Disable Nagle’s algorithm on raw TCP SOCKET connections. NI-VISA does this by default; pyvisa-py does not, which can wedge instruments that reset on coalesced writes (issue #156). No effect on non-socket transports. Defaults to True.

visa_resource: str#
visa_backend: str | None = None#
serial_config: SerialConfig#
terminator: TerminatorConfig#
timeout: TimeoutConfig#
tcp_nodelay: bool = True#