Simple test

Ensure your device works with this simple test.

examples/si7021_simpletest.py

# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

"""
Initializes the sensor, gets and prints readings every two seconds.
"""

import time

import board

import adafruit_si7021

# Create library object using our Bus I2C port
i2c = board.I2C()  # uses board.SCL and board.SDA
# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
sensor = adafruit_si7021.SI7021(i2c)

# If you'd like to use the heater, you can uncomment the code below
# and pick a heater level that works for your purposes
#
# sensor.heater_enable = True
# sensor.heater_level = 0  # Use any level from 0 to 15 inclusive

while True:
    print(f"\nTemperature: {sensor.temperature:0.1f} C")
    print(f"Humidity: {sensor.relative_humidity:0.1f} %")
    time.sleep(2)

DisplayIO Simpletest

This is a simple test for boards with built-in display.

examples/si7021_displayio_simpletest.py

# SPDX-FileCopyrightText: 2024 Tim Cocks for Adafruit Industries
# SPDX-FileCopyrightText: 2024 Jose D. Montoya
#
# 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_si7021

# Simple demo of using the built-in display.
# create a main_group to hold anything we want to show on the display.
main_group = Group()
# Initialize I2C bus and sensor.
i2c = board.I2C()  # uses board.SCL and board.SDA
si = adafruit_si7021.SI7021(i2c)

# Create Label(s) 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(s) in the middle of the screen with anchored positioning
display_output_label.anchor_point = (0, 0)
display_output_label.anchored_position = (
    4,
    board.DISPLAY.height // 2 - 60,
)

# add the label(s) 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 text of the label(s) to show the sensor readings
    display_output_label.text = f"Temp: {si.temperature:.1f}C\nHum: {si.relative_humidity:.1f}%\n"
    # wait for a bit
    time.sleep(0.5)