`laser_at`¶

Driver for an inexpensive laser rangefinder module, made by Hi-AT, available on aliexpress.

Implementation Notes¶

Hardware:

Hi-AT laser range finder

Software and Dependencies:

Adafruit CircuitPython firmware for the supported boards: https://circuitpython.org/downloads

class laser_at.Laser(uart: busio.UART, speed: bytes = b'D')¶

Driver for low cost laser range finder by Hi-AT.

Parameters:

uart (UART) – The I2C bus the LSM6DS3 is connected to.
speed – The speed at which to take a measurement. Choices are Laser.FAST, Laser.MEDIUM, and Laser.SLOW

async async_read(timeout=None)¶

Make an asynchronous laser reading

Parameters:: timeout (int) – How long to wait for a reading in millisecond. Default depends on speed: 1000 for FAST, 3000 for MEDIUM, 6000 for SLOW.
Raises:: LaserError if a bad reading is done, LaserTimeoutError if the reading times out
Returns:: Distance in metres

property distance¶

Distance as measured by the device

Raises:: LaserError if a bad reading is done, LaserTimeoutError if the reading times out
Returns:: Distance in cm

property on¶: Whether the laser is currently on or not. You can turn the laser on or off by assigning to this property

read_measurement(timeout: Optional[int] = None) → float¶

Retrieve a reading form the laser

Parameters:: timeout (int) – How long to wait for a reading in millisecond. Default depends on speed: 1000 for FAST, 3000 for MEDIUM, 6000 for SLOW.
Raises:: LaserError if a bad reading is done, LaserTimeoutError if the reading times out
Returns:: Distance in metres