Note

Ophyd async is included on a provisional basis until the v1.0 release and may change API on minor release numbers before then

ophyd_async.core.SignalRW

class ophyd_async.core.SignalRW(backend: SignalBackend[T], timeout: float | None = 10.0)

Bases: SignalR[T], SignalW[T], Locatable

Signal that can be both read and set

Methods

children
clear_sub	Remove a subscription.
connect
describe	Return a single item dict with the descriptor in it
get_value	The current value
locate
read	Return a single item dict with the reading in it
set	Set the value and return a status saying when it's done
set_name
stage	Start caching this signal
subscribe	Subscribe to updates in the reading
subscribe_value	Subscribe to updates in value of a device
unstage	Stop caching this signal

Attributes

name
parent	The parent Device if it exists
source	//PV_PREFIX:SIGNAL, or "" if not set

clear_sub(function: Callable[[T], None]) → None

Remove a subscription.

async describe() → Dict[str, DataKey]

Return a single item dict with the descriptor in it

async get_value(cached: bool | None = None) → T

The current value

async read(cached: bool | None = None) → Dict[str, Reading]

Return a single item dict with the reading in it

set(value: T, wait=True, timeout='USE_DEFAULT_TIMEOUT') → AsyncStatus

Set the value and return a status saying when it’s done

property source: str

//PV_PREFIX:SIGNAL, or “” if not set

Type:

Like ca

stage() → None

Start caching this signal

subscribe(function: Callable[[Dict[str, Reading]], None]) → None

Subscribe to updates in the reading

subscribe_value(function: Callable[[T], None])

Subscribe to updates in value of a device

unstage() → None

Stop caching this signal