Category: Raspberry

ARDUINO

Servo motor

 

RASPBERRY SENSE HAT

Värviline Digipurk

Erinevad programmid

projects.raspberrypi.org/en/projects/getting-started-with-the-sense-hat

RGB värvid

255	0	0	Punane
0	255	0	Roheline
0	0	255	Sinine
255	255	0	Kollane
255	0	255	Lilla
0	255	255	Siniroheline

Erinevad värvid

www.w3schools.com/colors/colors_picker.asp?colorhex=ff00ff

RGB kalkulaator

www.w3schools.com/colors/colors_rgb.asp

Tekst

from sense_hat import SenseHat
sense = SenseHat()
sense.show_message(“Hello world”)

RGB värv

from sense_hat import SenseHat
sense = SenseHat()
r = 255
g = 255
b = 255
sense.clear((r, g, b))

Liikuv tekst

from sense_hat import SenseHat
sense = SenseHat()
blue = (0, 0, 255)
yellow = (255, 255, 0)
sense.show_message(“Astro Pi is awesome!”, text_colour=yellow, back_colour=blue, scroll_speed=0.05)

Erinevat värvi tähed

from sense_hat import SenseHat
from time import sleep
sense = SenseHat()
red = (255, 0, 0)
blue = (0, 0, 255)
green = (0, 255, 0)
white = (255, 255, 255)
yellow = (255, 255, 0)
sense.show_letter(“L”, red)
sleep(1)
sense.show_letter(“a”, blue)
sleep(1)
sense.show_letter(“u”, green)
sleep(1)
sense.show_letter(“r”, white)
sleep(1)
sense.show_letter(“a”, yellow)

Suvalised värvid

from sense_hat import SenseHat
from time import sleep
from random import randint
sense = SenseHat()
red = (255, 0, 0)
blue = (0, 0, 255)
green = (0, 255, 0)
white = (255, 255, 255)
yellow = (255, 255, 0)
# Generate a random colour
def pick_random_colour():
random_red = randint(0, 255)
random_green = randint(0, 255)
random_blue = randint(0, 255)
return (random_red, random_green, random_blue)
sense.show_letter(“L”, pick_random_colour())
sleep(1)
sense.show_letter(“a”, pick_random_colour())
sleep(1)
sense.show_letter(“u”, pick_random_colour())
sleep(1)
sense.show_letter(“r”, pick_random_colour())
sleep(1)
sense.show_letter(“a”, pick_random_colour())
sleep(1)
sense.clear()

Pikslid

from sense_hat import SenseHat
sense = SenseHat()
blue = (0, 0, 255)
red = (255, 0, 0)
sense.set_pixel(0, 2, blue)
sense.set_pixel(7, 4, red)

---

from sense_hat import SenseHat
sense = SenseHat()
sense.set_pixel(2, 2, (0, 0, 255))
sense.set_pixel(4, 2, (0, 0, 255))
sense.set_pixel(3, 4, (100, 0, 0))
sense.set_pixel(1, 5, (255, 0, 0))
sense.set_pixel(2, 6, (255, 0, 0))
sense.set_pixel(3, 6, (255, 0, 0))
sense.set_pixel(4, 6, (255, 0, 0))
sense.set_pixel(5, 5, (255, 0, 0))

---

from sense_hat import SenseHat
sense = SenseHat()
# Define some colours
g = (0, 255, 0) # Green
b = (0, 0, 0) # Black
# Set up where each colour will display
creeper_pixels = [
g, g, g, g, g, g, g, g,
g, g, g, g, g, g, g, g,
g, b, b, g, g, b, b, g,
g, b, b, g, g, b, b, g,
g, g, g, b, b, g, g, g,
g, g, b, b, b, b, g, g,
g, g, b, b, b, b, g, g,
g, g, b, g, g, b, g, g
]
# Display these colours on the LED matrix
sense.set_pixels(creeper_pixels)

Õhurõhk

from sense_hat import SenseHat
sense = SenseHat()
sense.clear()
pressure = sense.get_pressure()
print(pressure)

Temperatuur

from sense_hat import SenseHat
sense = SenseHat()
sense.clear()
temp = sense.get_temperature()
print(temp)

Õhuniiskus

from sense_hat import SenseHat
sense = SenseHat()
sense.clear()
humidity = sense.get_humidity()
print(humidity)

Õhurõhk, temperatuur ja õhuniiskus

from sense_hat import SenseHat
sense = SenseHat()
while True:
# Take readings from all three sensors
t = sense.get_temperature()
p = sense.get_pressure()
h = sense.get_humidity()
# Round the values to one decimal place
t = round(t, 1)
p = round(p, 1)
h = round(h, 1)
# Create the message
# str() converts the value to a string so it can be concatenated
message = “Temperature: ” + str(t) + ” Pressure: ” + str(p) + ” Humidity: ” + str(h)
# Display the scrolling message
sense.show_message(message, scroll_speed=0.05)

---

from sense_hat import SenseHat
sense = SenseHat()
# Define the colours red and green
red = (255, 0, 0)
green = (0, 255, 0)
while True:
# Take readings from all three sensors
t = sense.get_temperature()
p = sense.get_pressure()
h = sense.get_humidity()
# Round the values to one decimal place
t = round(t, 1)
p = round(p, 1)
h = round(h, 1)
# Create the message
# str() converts the value to a string so it can be concatenated
message = “Temperature: ” + str(t) + ” Pressure: ” + str(p) + ” Humidity: ” + str(h)
if t > 18.3 and t < 26.7:
bg = green
else:
bg = red
# Display the scrolling message
sense.show_message(message, scroll_speed=0.05, back_colour=bg)

Liikumine

from sense_hat import SenseHat
sense = SenseHat()
sense.clear()
o = sense.get_orientation()
pitch = o[“pitch”]
roll = o[“roll”]
yaw = o[“yaw”]
print(“pitch {0} roll {1} yaw {2}”.format(pitch, roll, yaw))

---

---

from sense_hat import SenseHat
sense = SenseHat()
# Display the letter J
sense.show_letter(“J”)
while True:
acceleration = sense.get_accelerometer_raw()
x = acceleration[‘x’]
y = acceleration[‘y’]
z = acceleration[‘z’]
x=round(x, 0)
y=round(y, 0)
z=round(z, 0)
print(“x={0}, y={1}, z={2}”.format(x, y, z))
# Update the rotation of the display depending on which way up the Sense HAT is
if x == -1:
sense.set_rotation(180)
elif y == 1:
sense.set_rotation(90)
elif y == -1:
sense.set_rotation(270)
else:
sense.set_rotation(0)

Joystick – klaviatuuri noolte kasutamine

from sense_hat import SenseHat
sense = SenseHat()
while True:
for event in sense.stick.get_events():
print(event.direction, event.action)

---

from sense_hat import SenseHat
from time import sleep
sense = SenseHat()
e = (0, 0, 0)
w = (255, 255, 255)
sense.clear()
while True:
for event in sense.stick.get_events():
# Check if the joystick was pressed
if event.action == “pressed”:
# Check which direction
if event.direction == “up”:
sense.show_letter(“U”) # Up arrow
elif event.direction == “down”:
sense.show_letter(“D”) # Down arrow
elif event.direction == “left”:
sense.show_letter(“L”) # Left arrow
elif event.direction == “right”:
sense.show_letter(“R”) # Right arrow
elif event.direction == “middle”:
sense.show_letter(“M”) # Enter key
# Wait a while and then clear the screen
sleep(0.5)
sense.clear()

---

from sense_hat import SenseHat
sense = SenseHat()
# Define the functions
def red():
sense.clear(255, 0, 0)
def blue():
sense.clear(0, 0, 255)
def green():
sense.clear(0, 255, 0)
def yellow():
sense.clear(255, 255, 0)
# Tell the program which function to associate with which direction
sense.stick.direction_up = red
sense.stick.direction_down = blue
sense.stick.direction_left = green
sense.stick.direction_right = yellow
sense.stick.direction_middle = sense.clear # Press the enter key
while True:
pass # This keeps the program running to receive joystick events

Projekt – reaktsiooni kiiruse mäng

# IMPORT the required libraries (sense_hat, time, random)
from sense_hat import SenseHat
from time import sleep
from random import choice
# CREATE a sense object
sense = SenseHat()
# Set up the colours (white, green, red, empty)
w = (150, 150, 150)
g = (0, 255, 0)
r = (255, 0, 0)
e = (0, 0, 0)
# Create images for three different coloured arrows
arrow = [
e,e,e,w,w,e,e,e,
e,e,w,w,w,w,e,e,
e,w,e,w,w,e,w,e,
w,e,e,w,w,e,e,w,
e,e,e,w,w,e,e,e,
e,e,e,w,w,e,e,e,
e,e,e,w,w,e,e,e,
e,e,e,w,w,e,e,e
]
arrow_red = [
e,e,e,r,r,e,e,e,
e,e,r,r,r,r,e,e,
e,r,e,r,r,e,r,e,
r,e,e,r,r,e,e,r,
e,e,e,r,r,e,e,e,
e,e,e,r,r,e,e,e,
e,e,e,r,r,e,e,e,
e,e,e,r,r,e,e,e
]
arrow_green = [
e,e,e,g,g,e,e,e,
e,e,g,g,g,g,e,e,
e,g,e,g,g,e,g,e,
g,e,e,g,g,e,e,g,
e,e,e,g,g,e,e,e,
e,e,e,g,g,e,e,e,
e,e,e,g,g,e,e,e,
e,e,e,g,g,e,e,e
]
# Set a variable pause to 3 (the initial time between turns)
# Set variables score and angle to 0
# Create a variable called play set to True (this will be used to stop the game later)
pause = 3
score = 0
angle = 0
play = True
sense.show_message(“Keep the arrow pointing up”, scroll_speed=0.05, text_colour=[100,100,100])
# WHILE play == True
while play:
# CHOOSE a new random angle
last_angle = angle
while angle == last_angle:
angle = choice([0, 90, 180, 270])
sense.set_rotation(angle)
# DISPLAY the white arrow
sense.set_pixels(arrow)
# SLEEP for current pause length
sleep(pause)
acceleration = sense.get_accelerometer_raw()
x = acceleration[‘x’]
y = acceleration[‘y’]
z = acceleration[‘z’]
x = round(x, 0)
y = round(y, 0)
print(angle)
print(x)
print(y)
# IF orientation matches the arrow…
if x == -1 and angle == 180:
# ADD a point and turn the arrow green
sense.set_pixels(arrow_green)
score += 1
elif x == 1 and angle == 0:
sense.set_pixels(arrow_green)
score += 1
elif y == -1 and angle == 90:
sense.set_pixels(arrow_green)
score += 1
elif y == 1 and angle == 270:
sense.set_pixels(arrow_green)
score += 1
else:
# SET play to `False` and DISPLAY the red arrow
sense.set_pixels(arrow_red)
play = False
# Shorten the pause duration slightly
pause = pause * 0.95
# Pause before the next arrow
sleep(0.5)
# When loop is exited, display a message with the score
msg = “Your score was %s” % score
sense.show_message(msg, scroll_speed=0.05, text_colour=[100, 100, 100])

Veel ideid

• Tell a joke on the LED screen.
• If your Sense HAT is connected to the internet, you could use a Twitter API library to make it display incoming tweets.
• Create your own images to display on the LED matrix.
• Can you alternate between images to create an animation? Check out this Geek Gurl Diaries video for some inspiration.
• Create an electronic dielike this one. Shaking the Pi triggers the roll of the die.
• Create a simple graphical thermometer which outputs different colours or patterns depending on the temperature.
• Write a program that displays an arrow (or other symbol) on screen; this symbol could be used to point to which way is down. This way, astronauts in low gravity always know where the Earth is.
• Use the accelerometer to sense small movements — this could form part of a game, alarm system, or even an earthquake sensor.
• Make use of the humidity sensor to detect breath and display a colour depending on the humidity.