Ensure your device works with this simple test.
examples/ccs811_simpletest.py 1# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
2# SPDX-License-Identifier: MIT
3
4import time
5
6import board
7
8import adafruit_ccs811
9
10i2c = board.I2C() # uses board.SCL and board.SDA
11# i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector on a microcontroller
12ccs811 = adafruit_ccs811.CCS811(i2c)
13
14# Wait for the sensor to be ready
15while not ccs811.data_ready:
16 pass
17
18while True:
19 print(f"CO2: {ccs811.eco2} PPM, TVOC: {ccs811.tvoc} PPB")
20 time.sleep(0.5)
DisplayIO Simpletest
This is a simple test for boards with built-in display.
examples/ccs811_displayio_simpletest.py 1# SPDX-FileCopyrightText: 2024 Tim Cocks for Adafruit Industries
2# SPDX-FileCopyrightText: 2024 Jose D. Montoya
3#
4# SPDX-License-Identifier: MIT
5
6import time
7
8import board
9from adafruit_display_text.bitmap_label import Label
10from displayio import Group
11from terminalio import FONT
12
13import adafruit_ccs811
14
15# Simple demo of using the built-in display.
16# create a main_group to hold anything we want to show on the display.
17main_group = Group()
18# Initialize I2C bus and sensor.
19i2c = board.I2C() # uses board.SCL and board.SDA
20ccs811 = adafruit_ccs811.CCS811(i2c)
21
22# Wait for the sensor to be ready
23while not ccs811.data_ready:
24 pass
25
26# Create Label(s) to show the readings. If you have a very small
27# display you may need to change to scale=1.
28display_output_label = Label(FONT, text="", scale=2)
29
30# place the label(s) in the middle of the screen with anchored positioning
31display_output_label.anchor_point = (0, 0)
32display_output_label.anchored_position = (
33 4,
34 board.DISPLAY.height // 2 - 60,
35)
36
37# add the label(s) to the main_group
38main_group.append(display_output_label)
39
40# set the main_group as the root_group of the built-in DISPLAY
41board.DISPLAY.root_group = main_group
42
43# begin main loop
44while True:
45 # update the text of the label(s) to show the sensor readings
46 display_output_label.text = f"CO2: {ccs811.eco2} PPM\nTVOC: {ccs811.tvoc} PPB"
47 # wait for a bit
48 time.sleep(0.5)
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