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DualButton Led will nicht

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Hallo zusammen,

ich habe folgendes Problem:

Ich habe einen DualButton und möchte Testweise die linke LED mit Python einschalten.

Ich habe das Beispielprogramm genommen und erweitert, aber es will nicht so wie ich will.


HOST = "localhost"
PORT = 4223
UID_dualButton = "MeA"                                                           # Change XYZ to the UID of your Dual Button Bricklet 2.0

from tinkerforge.ip_connection import IPConnection
from tinkerforge.bricklet_dual_button_v2 import BrickletDualButtonV2

def cb_state_changed(dualbutton_l, dualbutton_r, led_l, led_r):              # Callback function for state changed callback
    if dualbutton_l == BrickletDualButtonV2.BUTTON_STATE_PRESSED:
        print("Linker Button: gedrückt")
    elif dualbutton_l == BrickletDualButtonV2.BUTTON_STATE_RELEASED:
        print("Linker Button: nicht gedrückt")

    if dualbutton_r == BrickletDualButtonV2.BUTTON_STATE_PRESSED:
        print("Rechter Button: gedrückt")
    elif dualbutton_r == BrickletDualButtonV2.BUTTON_STATE_RELEASED:
        print("Rechter Button: nicht gedrückt")

if __name__ == "__main__":
    ipcon = IPConnection()                                                          # Create IP connection
    db = BrickletDualButtonV2(UID_dualButton, ipcon)                        # Create device object

    ipcon.connect(HOST, PORT)                                                   # Connect to brickd
    # Don't use device before ipcon is connected



 Dies sind meine Versuche
    #db.setLEDState(BrickletDualButton.LED_STATE_ON, BrickletDualButton.LED_STATE_OFF)
    # db.set_selected_led_state(BrickletDualButtonV2.LED_STATE_OFF, BrickletDualButtonV2.LED_STATE_ON)
    #db.BrickletDualButtonV2.set_selected_led_state(0, 2)
    # BrickletDualButtonV2.set_selected_led_state(0, 2)
    # BrickletDualButtonV2.set_led_state(2, 2)



    # Register state changed callback to function cb_state_changed
    db.register_callback(db.CALLBACK_STATE_CHANGED, cb_state_changed)
    db.set_state_changed_callback_configuration(True)                       # Enable state changed callback

    input("Press key to exit\n")

Wo ist da der Fehler?


Vielen Dank im Voraus.



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