Add displayio example

examples/pm25_displayio_simpletest.py

@@ -0,0 +1,51 @@
+# 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
+
+from adafruit_pm25.i2c import PM25_I2C
+
+# 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
+pm25 = PM25_I2C(i2c, reset_pin=None)
+
+
+# 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:
+    try:
+        aqdata = pm25.read()
+    except RuntimeError:
+        continue
+    # Update the label.text property to change the text on the display
+    # show some of the values returned by the sensor read, one per line
+    display_output_label.text = f"PM 1.0: {aqdata["pm10 standard"]} \
+        \nPM 2.5: {aqdata["pm25 standard"]} \
+        \n1.0um / 0.1L: {aqdata["particles 10um"]} \
+        \n2.5um / 0.1L: {aqdata["particles 25um"]} "
+    # Wait a bit between reads
+    time.sleep(1)