03: Triggering different sequences based on context or interaction
How could we trigger different sequences based on user or context interaction? In this example, we will create a little ItsyCreature that sleeps peacefully until disturbed – in that case it wakes up and gets angry at the disturbance!
Connect the Chainable LED to pin D13, the Servo Motor to pin D2 and the Touch Sensor to D3. By default, the creature will “sleep” in peace, but when touched get angry until the sensor is released again.
##--- Library Imports
import time
import board
import neopixel
import pwmio
import digitalio
from adafruit_motor import servo
from varspeed import Vspeed
##--- VarSpeed Variables
MIN_LED = 0 # The minimum possible value of our component
MAX_LED = 255 # The maximum possible value of our component
vs_led = Vspeed(init_position=MIN_LED, result="int") # init_position = initial start position // result = float, int
vs_led.set_bounds(lower_bound=MIN_LED, upper_bound=MAX_LED) # make the output of the function be within the bounds set
MIN_SERVO = 0 # The minimum possible value of our component
MAX_SERVO = 180 # The maximum possible value of our component
vs_servo = Vspeed(init_position=MIN_SERVO,
result="int") # init_position = initial start position // result = float, int
vs_servo.set_bounds(lower_bound=MIN_SERVO,
upper_bound=MAX_SERVO) # make the output of the function be within the bounds set
##--- Hardware Setup
# Add a touch sensor
touch = digitalio.DigitalInOut(board.D3)
touch.direction = digitalio.Direction.INPUT
pin_leds = board.D13
num_leds = 1
leds = neopixel.NeoPixel(pin_leds, num_leds, auto_write=False, pixel_order=neopixel.GRBW)
pwm = pwmio.PWMOut(board.D2, duty_cycle=2 ** 15, frequency=50) # create a PWMOut object on Pin D2.
my_servo = servo.Servo(pwm) # Create a servo object, my_servo
my_servo.angle = MIN_SERVO # set the servo to a known starting point
##--- Custom Movement Sequence
# This is where we can define the brightness of our LDED
# The sequence will go through each entry and move to the next entry
# The sequence is defined in this format: (next-position,seconds-to-move,number-of-steps,easing function)
# Take a look at different easing functions here: https://easings.net
led_sequence_sleep = [
(80, 3, 80, "QuadEaseIn"),
(80, 2, 1, "LinearInOut"),
(0, 3, 80, "QuadEaseInOut"),
(0, 2, 1, "LinearInOut")
]
led_sequence_angry = [
(MAX_LED, 0.01, 1, "QuadEaseInOut"),
(MIN_LED, 0.01, 1, "QuadEaseInOut")
]
servo_sequence_sleep = [
(0, 1.0, 1, "LinearInOut"),
(10, 0.1, 2, "LinearInOut"),
(0, 0.1, 2, "LinearInOut"),
(10, 0.1, 2, "LinearInOut"),
(0, 0.1, 2, "LinearInOut"),
(0, 10.0, 11, "LinearInOut")
]
servo_sequence_angry = [
(10, 0.01, 1, "LinearInOut"),
(MIN_SERVO, 0.01, 1, "LinearInOut")
]
# Define what should happen when we get to the end of our LED sequence
led_looping = 0 # play the sequence in an endless loop forever
# led_looping = 1 # play the sequence only once
# led_looping = 10 # play the sequence 10 times
# led_looping = 15 # play the sequence 15 times
# Define what should happen when we get to the end of our servo sequence
servo_looping = 0 # play the sequence in an endless loop forever
# servo_looping = 1 # play the sequence only once
# servo_looping = 10 # play the sequence 10 times
# servo_looping = 15 # play the sequence 15 times
# Set the LEDs to off
leds.fill((0, 0, 0))
leds.show()
##--- Main loop
while True:
if touch.value == False:
print("sleeping 😴")
# Make a call to the library and request the desired of our LED
position_led, running_led, changed_led = vs_led.sequence(sequence=led_sequence_sleep, loop_max=led_looping)
# See if the values changed for the next move, then do so
if changed_led:
# print(f'Sequence Num: {vs_led.seq_pos}, Step: {vs_led.step}, Position: {position_led}')
# Turn LED White
led_value = int(position_led)
leds.fill((0, 0, 0, led_value))
leds.show()
# Make a call to the library and request the desired of our servo motor
position_servo, running_servo, changed_servo = vs_servo.sequence(sequence=servo_sequence_sleep,
loop_max=servo_looping)
# See if the values changed for the next move, then do so
if changed_servo:
# print(f'Sequence Num: {vs_servo.seq_pos}, Step: {vs_servo.step}, Position: {position_servo}')
my_servo.angle = position_servo
elif touch.value == True:
print("angry!!! 😡")
# Make a call to the library and request the desired of our LED
position_led, running_led, changed_led = vs_led.sequence(sequence=led_sequence_angry, loop_max=led_looping)
# See if the values changed for the next move, then do so
if changed_led:
# print(f'Sequence Num: {vs_led.seq_pos}, Step: {vs_led.step}, Position: {position_led}')
# Turn LED Red
led_value = int(position_led)
leds.fill((led_value, 0, 0))
leds.show()
# Make a call to the library and request the desired of our servo motor
position_servo, running_servo, changed_servo = vs_servo.sequence(sequence=servo_sequence_angry,
loop_max=servo_looping)
# See if the values changed for the next move, then do so
if changed_servo:
# print(f'Sequence Num: {vs_servo.seq_pos}, Step: {vs_servo.step}, Position: {position_servo}')
my_servo.angle = position_servo
time.sleep(0.05)