viam.components.power_sensor.power_sensor
Classes
PowerSensor reports information about voltage, current and power. |
Module Contents
- class viam.components.power_sensor.power_sensor.PowerSensor(name: str)[source]
Bases:
viam.components.component_base.ComponentBase
PowerSensor reports information about voltage, current and power.
This acts as an abstract base class for any sensors that can provide data regarding voltage, current and/or power. This cannot be used on its own. If the
__init__()
function is overridden, it must call thesuper().__init__()
function.from viam.components.power_sensor import PowerSensor
For more information, see Power Sensor component.
- SUBTYPE: Final
The Subtype of the Resource
- abstract get_voltage(*, extra: Dict[str, Any] | None = None, timeout: float | None = None, **kwargs) Tuple[float, bool] [source]
- Async:
Return the voltage reading of a specified device and whether it is AC or DC.
my_power_sensor = PowerSensor.from_robot(robot=robot, name='my_power_sensor') # Get the voltage reading from the power sensor voltage, is_ac = await my_power_sensor.get_voltage() print("The voltage is", voltage, "V, Is AC:", is_ac)
- Returns:
A float representing the voltage reading in V. A bool indicating whether the voltage is AC (true) or DC (false).
- Return type:
Tuple[float, bool]
For more information, see Power Sensor component.
- abstract get_current(*, extra: Dict[str, Any] | None = None, timeout: float | None = None, **kwargs) Tuple[float, bool] [source]
- Async:
Return the current of a specified device and whether it is AC or DC.
my_power_sensor = PowerSensor.from_robot(robot=robot, name='my_power_sensor') # Get the current reading from the power sensor current, is_ac = await my_power_sensor.get_current() print("The current is ", current, " A, Is AC: ", is_ac)
- Returns:
A tuple which includes a float representing the current reading in amps, and a bool indicating whether the current is AC (true) or DC (false).
- Return type:
Tuple[float, bool]
For more information, see Power Sensor component.
- abstract get_power(*, extra: Dict[str, Any] | None = None, timeout: float | None = None, **kwargs) float [source]
- Async:
Return the power reading in watts.
my_power_sensor = PowerSensor.from_robot(robot=robot, name='my_power_sensor') # Get the power reading from the power sensor power = await my_power_sensor.get_power() print("The power is", power, "Watts")
- Returns:
The power reading in watts.
- Return type:
float
For more information, see Power Sensor component.
- async get_readings(*, extra: Dict[str, Any] | None = None, timeout: float | None = None, **kwargs) Mapping[str, viam.utils.SensorReading] [source]
Get the measurements or readings that this power sensor provides. If a sensor is not configured correctly or fails to read a piece of data, it will not appear in the readings dictionary.
my_power_sensor = PowerSensor.from_robot(robot=robot, name='my_power_sensor') # Get the readings provided by the sensor. readings = await my_power_sensor.get_readings()
- Returns:
- The readings for the PowerSensor. Can be of any type. Includes voltage in volts (float), current in
amperes (float), is_ac (bool), and power in watts (float).
- Return type:
Mapping[str, Any]
For more information, see Power Sensor component.
- classmethod from_robot(robot: viam.robot.client.RobotClient, name: str) typing_extensions.Self
Get the component named
name
from the provided robot.- Parameters:
robot (RobotClient) – The robot
name (str) – The name of the component
- Returns:
The component, if it exists on the robot
- Return type:
Self
- abstract do_command(command: Mapping[str, ValueTypes], *, timeout: float | None = None, **kwargs) Mapping[str, ValueTypes]
- Async:
Send/Receive arbitrary commands to the Resource
command = {"cmd": "test", "data1": 500} result = component.do(command)
- Parameters:
command (Mapping[str, ValueTypes]) – The command to execute
- Raises:
NotImplementedError – Raised if the Resource does not support arbitrary commands
- Returns:
Result of the executed command
- Return type:
Mapping[str, ValueTypes]
- async get_geometries(*, extra: Dict[str, Any] | None = None, timeout: float | None = None) List[viam.proto.common.Geometry]
Get all geometries associated with the component, in their current configuration, in the frame of the component.
geometries = await component.get_geometries() if geometries: # Get the center of the first geometry print(f"Pose of the first geometry's centerpoint: {geometries[0].center}")
- Returns:
The geometries associated with the Component.
- Return type:
List[Geometry]
- classmethod get_resource_name(name: str) viam.proto.common.ResourceName
Get the ResourceName for this Resource with the given name
# Can be used with any resource, using an arm as an example my_arm_name = Arm.get_resource_name("my_arm")
- Parameters:
name (str) – The name of the Resource
- Returns:
The ResourceName of this Resource
- Return type:
- get_operation(kwargs: Mapping[str, Any]) viam.operations.Operation
Get the
Operation
associated with the currently running function.When writing custom resources, you should get the
Operation
by calling this function and check to see if it’s cancelled. If theOperation
is cancelled, then you can perform any necessary (terminating long running tasks, cleaning up connections, etc. ).- Parameters:
kwargs (Mapping[str, Any]) – The kwargs object containing the operation
- Returns:
The operation associated with this function
- Return type:
- async close()
Safely shut down the resource and prevent further use.
Close must be idempotent. Later configuration may allow a resource to be “open” again. If a resource does not want or need a close function, it is assumed that the resource does not need to return errors when future non-Close methods are called.
await component.close()