io_pin : can you explain how to read/write to 1 particular pin? about kaspersmicrobit HOT 3 CLOSED

Hi @janickr ,
It works now! Thanks for your support :)

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Hi @idef1x, no worries I'm happy to help

Writing a to a single pin is supported: you can supply a list containing only one pin value, like this:

# wrapping the PinValue in [ ] creates a list
microbit.io_pin.write_data([PinValue(Pin.P1, 1)])

The bluetooth io pin service in the microbit bluetooth profile defines the result of the read operation to return the values for all input pins. Kaspersmicrobit cannot change that.

If you define a function which looks for the pin in the list and returns the value if it exists:

def pin_value(pin, values):
    return next((v.value for v in values if v.pin == pin), None)

Then you can select the value of a single pin:

value_of_p1 = pin_value(Pin.P1, your_microbit.io_pin.read_data())

An alternative could be a function to create a dict from the list of values:

from collections import defaultdict

def to_dict(values):
    return defaultdict(lambda:None, {p.pin: p.value for p in values})

this can help you access values from different pins:

pin_values = to_dict(your_microbit.io_pin.read_data())
value_of_p1 = pin_values[Pin.P1] 
value_of_p5 = pin_values[Pin.P5] 

Maybe I'll also include a function like this in a next release of Kaspersmicrobit .

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Hi @janickr ,

Thanks for your swift response! Will try it out after the weekend as it's to sunny atm here in the Netherlands ;-)
Will let you know if I succeed :-)

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