class Tinkerforge::BrickletDualButton
Two tactile buttons with built-in blue LEDs
Constants
- CALLBACK_STATE_CHANGED
This callback is called whenever a button is pressed.
Possible states for buttons are:
-
0 = pressed
-
1 = released
Possible states for LEDs are:
-
0 = AutoToggleOn: Auto toggle enabled and LED on.
-
1 = AutoToggleOff: Auto toggle enabled and LED off.
-
2 = On: LED on (auto toggle is disabled).
-
3 = Off: LED off (auto toggle is disabled).
-
Public Class Methods
Creates an object with the unique device ID uid
and adds it to the IP Connection ipcon
.
# File lib/tinkerforge/bricklet_dual_button.rb, line 51 def initialize(uid, ipcon) super uid, ipcon, DEVICE_IDENTIFIER, DEVICE_DISPLAY_NAME @api_version = [2, 0, 0] @response_expected[FUNCTION_SET_LED_STATE] = RESPONSE_EXPECTED_FALSE @response_expected[FUNCTION_GET_LED_STATE] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_GET_BUTTON_STATE] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_SET_SELECTED_LED_STATE] = RESPONSE_EXPECTED_FALSE @response_expected[FUNCTION_GET_IDENTITY] = RESPONSE_EXPECTED_ALWAYS_TRUE @callback_formats[CALLBACK_STATE_CHANGED] = [12, 'C C C C'] @ipcon.add_device self end
Public Instance Methods
Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.
The position can be 'a', 'b', 'c', 'd', 'e', 'f', 'g' or 'h' (Bricklet Port). A Bricklet connected to an :ref:`Isolator Bricklet <isolator_bricklet>` is always at position 'z'.
The device identifier numbers can be found :ref:`here <device_identifier>`. |device_identifier_constant|
# File lib/tinkerforge/bricklet_dual_button.rb, line 121 def get_identity send_request FUNCTION_GET_IDENTITY, [], '', 33, 'Z8 Z8 k C3 C3 S' end
Returns the current state of the LEDs, as set by BrickletDualButton#set_led_state
.
# File lib/tinkerforge/bricklet_dual_button.rb, line 86 def get_led_state check_validity send_request FUNCTION_GET_LED_STATE, [], '', 10, 'C C' end
Registers a callback with ID id
to the block block
.
# File lib/tinkerforge/bricklet_dual_button.rb, line 126 def register_callback(id, &block) callback = block @registered_callbacks[id] = callback end
Sets the state of the LEDs. Possible states are:
-
0 = AutoToggleOn: Enables auto toggle with initially enabled LED.
-
1 = AutoToggleOff: Activates auto toggle with initially disabled LED.
-
2 = On: Enables LED (auto toggle is disabled).
-
3 = Off: Disables LED (auto toggle is disabled).
In auto toggle mode the LED is toggled automatically at each press of a button.
If you just want to set one of the LEDs and don't know the current state of the other LED, you can get the state with BrickletDualButton#get_led_state
or you can use BrickletDualButton#set_selected_led_state
.
# File lib/tinkerforge/bricklet_dual_button.rb, line 79 def set_led_state(led_l, led_r) check_validity send_request FUNCTION_SET_LED_STATE, [led_l, led_r], 'C C', 8, '' end
Sets the state of the selected LED (0 or 1).
The other LED remains untouched.
# File lib/tinkerforge/bricklet_dual_button.rb, line 105 def set_selected_led_state(led, state) check_validity send_request FUNCTION_SET_SELECTED_LED_STATE, [led, state], 'C C', 8, '' end