PosConCM

class compas_fab.sensors.PosConCM[source]

Bases: SerialSensor

Provides an interface for the Baumer PosConCM round objects measurement sensor.

The sensor has different interfaces to retrieve its data. This class provides access to the serial interface (RS-485). This class is a context manager type, so it’s best used in combination with the with statement to ensure resource deallocation. The protocol of the sensor when operated via RS-485 indicates that access to it must be locked programmatically before starting operations and unlocked on completion. This is handled automatically if you use this class on a with statement, otherwise, the methods begin() and end() must be invoked by hand.

Examples

>>> from serial import Serial                                                   
>>> with Serial('COM5', 57600, parity=PARITY_EVEN, timeout=1) as serial:                            
>>>     with PosConCM(serial, PosConCM.BROADCAST_ADDRESS) as broadcast_query:   
...         addr = broadcast_query.get_address()                                
...                                                                             
...     with PosConCM(serial, addr) as sensor:                                  
...         sensor.set_measurement_type('X-Center')                             
...         sensor.set_precision(2)                                             
...         data = sensor.get_measurement()                                     

Attributes:

serialserial.Serial: Instance of the serial port used to communicate with the sensor.
addressint: PosConCM sensors have an address assigned, which defaults to 1. There’s also a broadcast address (PosConCM.BROADCAST_ADDRESS) that can be used to query the address of the sensor connected to the RS-485 bus. Only one sensor can be in the bus when using the broadcast address to query for sensor’s address.

Methods

`activate_flex_mount`	Activates the FLEX Mount feature of the sensor to allow positioning it on an angled installation.
`adjust_to_dark_object`	Adjusts the sensor to detect darker or lighter surfaces.
`begin`	Locks the sensor to start RS-485 communication.
`calculate_checksum`	Checks that message is complete.
`deactivate_flex_mount`	Deactivates the FLEX Mount feature.
`end`	Unlocks the sensor from RS-485 communication.
`format_command`	Formats the command.
`get_address`	Gets the address of the RS-485 sensors currently connected to the bus.
`get_measurement`	Retrieves the current measurement of the sensor according to the current settings.
`get_payload`	Gets payload.
`reset`	Resets the sensor to factory settings.
`send_command`	Sends a command to the sensor's address specified.
`set_flex_mount`	Sets the FLEX Mount feature to a specific angle and distance.
`set_measurement_type`	Defines the measurement type to use.
`set_precision`	Defines the precision the sensor will use to determine edges:
`teach_flex_mount`	Sets the FLEX Mount feature to a specific angle and distance.