Display Output on the OLED Display

Now we want to display something on the OLED display of the senseBox MCU-S2. For this, we use the SSD1306 CircuitPython library and the adafruit_display_text library. Extract the .zip files and copy the .mpy files from the lib folders to the lib folder of your senseBox (CIRCUITPY drive).

Here is an example code that displays "Hi senseBox! :)" on the display:

import board
import displayio
import digitalio
import terminalio
from adafruit_display_text import label
import adafruit_displayio_ssd1306

# IO Enable
io_enable_pin = digitalio.DigitalInOut(board.IO_POWER)
io_enable_pin.direction = digitalio.Direction.OUTPUT
io_enable_pin.value = False

displayio.release_displays()

# Use for I2C
i2c = board.I2C()
display_bus = displayio.I2CDisplay(i2c, device_address=0x3D)

WIDTH = 128
HEIGHT = 64
BORDER = 5

display = adafruit_displayio_ssd1306.SSD1306(display_bus, width=WIDTH, height=HEIGHT)

# Make the display context
splash = displayio.Group()
display.root_group = splash

color_bitmap = displayio.Bitmap(WIDTH, HEIGHT, 1)
color_palette = displayio.Palette(1)
color_palette[0] = 0xFFFFFF  # White

bg_sprite = displayio.TileGrid(color_bitmap, pixel_shader=color_palette, x=0, y=0)
splash.append(bg_sprite)

# Draw a smaller inner rectangle
inner_bitmap = displayio.Bitmap(WIDTH - BORDER * 2, HEIGHT - BORDER * 2, 1)
inner_palette = displayio.Palette(1)
inner_palette[0] = 0x000000  # Black
inner_sprite = displayio.TileGrid(
    inner_bitmap, pixel_shader=inner_palette, x=BORDER, y=BORDER
)
splash.append(inner_sprite)

# Draw a label with shorter text
text = "Hi senseBox!"
text_area = label.Label(
    terminalio.FONT, text=text, color=0xFFFFFF, x=12, y=HEIGHT // 2 - 1
)
splash.append(text_area)

# Draw smiley face on the right side
smiley_palette = displayio.Palette(1)
smiley_palette[0] = 0xFFFFFF  # White

# Left eye
left_eye = displayio.Bitmap(4, 4, 1)
left_eye_sprite = displayio.TileGrid(left_eye, pixel_shader=smiley_palette, x=95, y=20)
splash.append(left_eye_sprite)

# Right eye
right_eye = displayio.Bitmap(4, 4, 1)
right_eye_sprite = displayio.TileGrid(right_eye, pixel_shader=smiley_palette, x=110, y=20)
splash.append(right_eye_sprite)

# Mouth
mouth = displayio.Bitmap(25, 3, 1)
mouth_sprite = displayio.TileGrid(mouth, pixel_shader=smiley_palette, x=92, y=40)
splash.append(mouth_sprite)

# Mouth corners
left_corner = displayio.Bitmap(3, 3, 1)
left_corner_sprite = displayio.TileGrid(left_corner, pixel_shader=smiley_palette, x=90, y=38)
splash.append(left_corner_sprite)

right_corner = displayio.Bitmap(3, 3, 1)
right_corner_sprite = displayio.TileGrid(right_corner, pixel_shader=smiley_palette, x=114, y=38)
splash.append(right_corner_sprite)

while True:
    pass