displayio example

examples/bme680_displayio_simpletest.py

@@ -0,0 +1,50 @@
+# SPDX-FileCopyrightText: 2024 Tim Cocks for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+from adafruit_display_text.bitmap_label import Label
+from terminalio import FONT
+from displayio import Group
+import adafruit_bme680
+
+# create a main_group to hold anything we want to show on the display.
+main_group = Group()
+
+# 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 on a microcontroller
+bme680 = adafruit_bme680.Adafruit_BME680_I2C(i2c, debug=False)
+
+# change this to match the location's pressure (hPa) at sea level
+bme680.sea_level_pressure = 1013.25
+
+# You will usually have to add an offset to account for the temperature of
+# the sensor. This is usually around 5 degrees but varies by use. Use a
+# separate temperature sensor to calibrate this one.
+temperature_offset = -5
+
+# 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 built-in DISPLAY
+board.DISPLAY.root_group = main_group
+
+# begin main loop
+while True:
+    # Update the label.text property to change the text on the display
+    display_output_label.text = """Temperature: {:.1f} C
+Humidity: {:.1f} %""".format(
+        bme680.temperature + temperature_offset, bme680.relative_humidity
+    )
+
+    # wait for a bit
+    time.sleep(1)