The Pico Display Pack for the Raspberry Pi Pico

# This example takes the temperature from the Pico's onboard temperature sensor, and displays it on Pico Display Pack, along with a little pixelly graph.
# It's based on the thermometer example in the "Getting Started with MicroPython on the Raspberry Pi Pico" book, which is a great read if you're a beginner!
 
import machine
import utime
import gc
 
# Pico Display boilerplate
import picodisplay as display
width = display.get_width()
height = display.get_height()
gc.collect()
display_buffer = bytearray(width * height * 2)
display.init(display_buffer)
 
# reads from Pico's temp sensor and converts it into a more manageable number
sensor_temp = machine.ADC(4)
conversion_factor = 3.3 / (65535)
temp_min = 10
temp_max = 30
bar_width = 5
 
# Set the display backlight to 50%
display.set_backlight(0.5)
 
temperatures = []
 
colors = [(0, 0, 255), (0, 255, 0), (255, 255, 0), (255, 0, 0)]
 
 
def temperature_to_color(temp):
    temp = min(temp, temp_max)
    temp = max(temp, temp_min)
 
    f_index = float(temp - temp_min) / float(temp_max - temp_min)
    f_index *= len(colors) - 1
    index = int(f_index)
 
    if index == len(colors) - 1:
        return colors[index]
 
    blend_b = f_index - index
    blend_a = 1.0 - blend_b
 
    a = colors[index]
    b = colors[index + 1]
 
    return [int((a[i] * blend_a) + (b[i] * blend_b)) for i in range(3)]
 
 
while True:
    # fills the screen with black
    display.set_pen(0, 0, 0)
    display.clear()
 
    # the following two lines do some maths to convert the number from the temp sensor into celsius
    reading = sensor_temp.read_u16() * conversion_factor
    temperature = 27 - (reading - 0.706) / 0.001721
 
    temperatures.append(temperature)
 
    # shifts the temperatures history to the left by one sample
    if len(temperatures) > width // bar_width:
        temperatures.pop(0)
 
    i = 0
    for t in temperatures:
        # chooses a pen colour based on the temperature
        display.set_pen(*temperature_to_color(t))
 
        # draws the reading as a tall, thin rectangle
        display.rectangle(i, height - (round(t) * 4), bar_width, height)
 
        # the next tall thin rectangle needs to be drawn
        # "bar_width" (default: 5) pixels to the right of the last one
        i += bar_width
 
    # heck lets also set the LED to match
    display.set_led(*temperature_to_color(temperature))
 
    # draws a white background for the text
    display.set_pen(255, 255, 255)
    display.rectangle(1, 1, 100, 25)
 
    # writes the reading as text in the white rectangle
    display.set_pen(0, 0, 0)
    display.text("{:.2f}".format(temperature) + "c", 3, 3, 0, 3)
 
    # time to update the display
    display.update()
 
    # waits for 5 seconds
    utime.sleep(5)

# This example shows you a simple, non-interrupt way of reading Pico Display's buttons with a loop that checks to see if buttons are pressed.
 
import picodisplay as display
import utime
 
# Initialise display with a bytearray display buffer
buf = bytearray(display.get_width() * display.get_height() * 2)
display.init(buf)
display.set_backlight(0.5)
 
 
# sets up a handy function we can call to clear the screen
def clear():
    display.set_pen(0, 0, 0)
    display.clear()
    display.update()
 
 
while True:
    if display.is_pressed(display.BUTTON_A):              # if a button press is detected then...
        clear()                                           # clear to black
        display.set_pen(255, 255, 255)                    # change the pen colour
        display.text("Button A pressed", 10, 10, 240, 4)  # display some text on the screen
        display.update()                                  # update the display
        utime.sleep(1)                                    # pause for a sec
        clear()                                           # clear to black again
    elif display.is_pressed(display.BUTTON_B):
        clear()
        display.set_pen(0, 255, 255)
        display.text("Button B pressed", 10, 10, 240, 4)
        display.update()
        utime.sleep(1)
        clear()
    elif display.is_pressed(display.BUTTON_X):
        clear()
        display.set_pen(255, 0, 255)
        display.text("Button X pressed", 10, 10, 240, 4)
        display.update()
        utime.sleep(1)
        clear()
    elif display.is_pressed(display.BUTTON_Y):
        clear()
        display.set_pen(255, 255, 0)
        display.text("Button Y pressed", 10, 10, 240, 4)
        display.update()
        utime.sleep(1)
        clear()
    else:
        display.set_pen(255, 0, 0)
        display.text("Press any button!", 10, 10, 240, 4)
        display.update()
    utime.sleep(0.1)  # this number is how frequently the Pico checks for button presses