Program never progresses

[EclecticInventor]

Using the latest beta, v3.3.0b8 (Pybricks Beta v2.2.0-beta.8), the code never detects white. running the example color detection code shows the sensor is detecting white. Is this a bug or something I'm missing?

from pybricks.hubs import InventorHub
from pybricks.pupdevices import Motor, ColorSensor, UltrasonicSensor, ColorDistanceSensor
from pybricks.parameters import Button, Color, Direction, Port, Side, Stop
from pybricks.tools import wait, StopWatch, run_task, multitask

gameStatus = 0

hub = InventorHub()
hub.display.orientation(up=Side.RIGHT)
coinSensor = ColorSensor(Port.A)

async def coinScan():
    while coinSensor.color() != Color.WHITE:
        await wait(20)
    print ("white")

async def attractMode():
    await multitask(coinScan())

#attract mode
run_task(attractMode())
gameStatus = 1

[laurensvalk]

All sensor methods are awaitables, too.

Change this:

coinSensor.color()

to

await coinSensor.color()

An upcoming documentation update will include await on each method where it is needed to make this easier to see.

Thanks!

[EclecticInventor]

I tried changing it to
await coinSensor.color() == Color.WHITE

and removing the wait but it just skips over it.

[laurensvalk]

Why remove the wait? That would leave an empty loop.

Happy to have a look at your new script :)

[laurensvalk]

I also noticed you changed != to ==, so it would only wait while white. It it doesn’t see white, the loop ends right away.

If in doubt, try a test program without await and multitasking first.

[EclecticInventor]

I just figured it out. I had it as await while, instead of while await