Add displayio example

Author: snkYmkrct

examples/scd4x_displayio_simpletest.py

@@ -0,0 +1,50 @@
+# SPDX-FileCopyrightText: 2024
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+from adafruit_display_text.bitmap_label import Label
+from displayio import Group
+from terminalio import FONT
+
+import adafruit_scd4x
+
+# Create sensor object, communicating over the board's default I2C bus
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector
+scd4x = adafruit_scd4x.SCD4X(i2c)
+
+print("Serial number:", [hex(i) for i in scd4x.serial_number])
+
+# Put sensor into working mode, one measurement every 5s
+scd4x.start_periodic_measurement()
+ 
+ 
+# Example written for boards with built-in displays
+display = board.DISPLAY
+
+# Create a main_group to hold anything we want to show on the display.
+main_group = Group()
+
+# Create a Label to show the readings. If you have a very small
+# display you may need to change to scale=1.
+display_output_label = Label(FONT, text="", scale=2)
+
+# Place the label near the top left corner with anchored positioning
+display_output_label.anchor_point = (0, 0)
+display_output_label.anchored_position = (4, 4)
+
+# Add the label to the main_group
+main_group.append(display_output_label)
+
+# Set the main_group as the root_group of the display
+display.root_group = main_group
+
+# Begin main loop
+while True:
+    if scd4x.data_ready:
+        # Update the label.text property to change the text on the display
+        # one sensor value per line
+        display_output_label.text = f"CO2: {scd4x.CO2} ppm \
+            \nTemperature: {scd4x.temperature:.1f} C \
+            \nHumidity: {scd4x.relative_humidity:.1f} %"